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Author SHA1 Message Date
8c49ef1e7a famous last words 2025-04-27 11:38:00 +02:00
a321798b37 small words big typos 2025-04-24 13:25:34 +02:00
41 changed files with 867 additions and 868 deletions

20
app.py
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@ -24,20 +24,6 @@ now = datetime.now()
word_count = 0
ins_count = 0
def imageSpread(params):
global documents
param = params.split(" ")
print(param[1])
for item in documents[param[0]]:
print(item.get("filename"))
d = [item for item in documents[param[0]] if item.get("filename") == param[1]]
print(d)
template = env.select_template(["snippets/spread-images.jinja"])
html = template.render(documents=documents, content=d[0], type=param[1])
return html
# jinja filter that can list documents
def listDocuments(params):
param = params.split(" ")
@ -75,8 +61,6 @@ def count_words_in_markdown(text):
# Remove enumerations
text = re.sub(r"[0-9#]*\.", "", text)
print("counting!")
print(text)
return len(text.split())
@ -93,7 +77,7 @@ def get_ins_count(html_string):
# jinja filter to replace shortcodes in HTML
def shortcode_filter(value):
shortcode_callbacks = {"show": listDocuments, "showImages": imageSpread}
shortcode_callbacks = {"show": listDocuments}
def shortcode_replacer(match):
@ -238,7 +222,7 @@ def preload_documents():
.strip()
)
documents["meta"] = {"now": now.strftime("%d %B %Y - %H:%M:%S"), "version": version}
documents["meta"] = {"now": now.strftime("%d %B %Y"), "version": version}
for subdir in os.listdir(CONTENT_D):
path = os.path.join(CONTENT_D, subdir)

File diff suppressed because it is too large Load Diff

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@ -1,3 +1,7 @@
:root {
--header-offset: 32mm;
}
* {
box-sizing: border-box;
}
@ -23,7 +27,7 @@ article header {
}
article header {
min-height: 32mm;
min-height: var(--header-offset);
}
aside+section p:first-child {
@ -171,7 +175,6 @@ figcaption:before {
.image-list {
break-inside: avoid;
break-before: page;
break-after: page;
width: calc(100% + var(--footnote-w));
margin-right: calc(var(--footnote-w) * -1);
}
@ -183,6 +186,11 @@ figcaption:before {
align-items: flex-end;
}
.image-list img {
max-width: calc(100% - var(--footnote-w) + 2rem);
.image-list figcaption {
max-width: var(--footnote-w);
}
.image-list img {
height: 50mm;
object-fit: cover;
}

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@ -72,7 +72,15 @@ body {
background: yellow;
@top-left {
content: "blank " counter(page);
content: none;
}
@top-right {
content: none;
}
@bottom-right {
content: none;
}
}
@ -126,27 +134,27 @@ body {
display: grid;
grid-template-columns: 1fr;
grid-template-rows: 1fr;
grid-template-areas: "nul";
grid-column-gap: 4mm;
grid-template-areas: "zero";
grid-gap: 4mm;
overflow: hidden;
}
header[data-length="2"] {
grid-template-columns: 1fr;
grid-template-rows: 50% 50%;
grid-template-areas: "nul" "1";
grid-template-rows: 1fr 1fr;
grid-template-areas: "zero" "one";
}
header[data-length="3"] {
grid-template-columns: 2fr 1fr;
grid-template-rows: 50% 50%;
grid-template-areas: "nul 1" "nul 2";
grid-template-rows: 1fr 1fr;
grid-template-areas: "zero one" "zero two";
}
header[data-length="4"] {
grid-template-columns: 1fr 1fr;
grid-template-rows: 50% 50%;
grid-template-areas: "nul 1" "2 3";
grid-template-rows: 1fr 1fr;
grid-template-areas: "zero one" "two three";
}
img {
@ -162,19 +170,19 @@ body {
}
figure[index="0"] {
grid-area: nul;
grid-area: zero;
}
figure[index="1"] {
grid-area: 1;
grid-area: one;
}
figure[index="2"] {
grid-area: 2;
grid-area: two;
}
figure[index="3"] {
grid-area: 3;
grid-area: three;
}
figure img {
@ -253,7 +261,11 @@ article>*:first-of-type:is(table) {
}
.fix-break-left {
break-after: right;
break-before: left;
}
.fix-break {
break-before: page;
}
h2:has( + p ), h3:has( + p ), h4:has( + p ), h5:has( + p ), h6:has( + p ) {

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@ -44,4 +44,3 @@ body {
display: inline-block;
}
}

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@ -16,11 +16,21 @@ tr {
td, th {
padding: 0.25em;
font-size: 9px;
font-size: 10px;
height: 30px;
overflow-wrap: break-word;
}
tr th:first-of-type, tr td:first-of-type {
padding-left: 0;
}
tr th:last-of-type, tr td:last-of-type {
padding-right: 0;
}
th {
padding: 0.25em;
height: 40px;
@ -51,11 +61,16 @@ div.table-wide table, table.table-wide, .table-inline {
border-collapse: collapse;
table-layout: fixed;
-fs-table-paginate: paginate;
page-break-inside: auto;
page-break-inside: avoid;
clear: both;
margin-bottom: .5rem;
}
.table-wide {
page-break-before: page;
page-break-inside: avoid;
}
.table-wide td, .table-wide th, .table-inline td, .table-inline th {
height: auto;
}
@ -67,9 +82,43 @@ div.table-wide table, table.table-wide, .table-inline {
table.table-wide tr, .table-wide table tr {
border-bottom: 1px dotted grey;
display: grid;
grid-template-columns: 70px 65px 3fr 3fr 45px;
grid-template-columns: 90px 65px 3fr 3fr 45px;
width: calc(100% + var(--footnote-w));
min-height: 30px;
align-items: center;
max-width: calc(var(--pagedjs-pagebox-width) - var(--pagedjs-margin-right) - var(--pagedjs-margin-left))
}
.table-wide table {
margin-top: var(--header-offset) !important;
}
td > * {
vertical-align: middle;
line-height: 0;
}
.table-wide h2 {
line-height: 0;
}
table mark {
background: none;
display: inline-flex;
justify-content: center;
align-items: center;
gap: .5rem;
color: inherit;
}
table mark:before {
font-weight: bold;
content: "•";
color: var(--accent);
font-size: 20px;
line-height: 1px;
}
colgroup {
display: none !important;
}

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@ -8,74 +8,65 @@ front: false
>> The real long-term future of computing consists of figuring out how to make the best possible use we can out of the literal millions of devices which already exist.
<cite>(Solderpunk, 2020, Cited in de Valk, 2022)
<span style="display: none;">[@devalkSalvagedComputing]</span></cite>
<span style="display: none;">[@devalkSalvagedComputing2024]</span></cite>
Beware! If youve picked up this publication expecting to learn how to make a flawless, DAW-less, in tune and always working polysynth, think again. However, if you, like me, are interested in making screamy, dreamy, sound devices using an alternative resource: trash, youve come to the right place.
Beware! If youve picked up this publication expecting to learn how to make a flawless, DAW-less, in tune and always working polysynth, think again. However, if you, like me, are interested in making screamy, dreamy, sound devices using components you can find *in the wild*, you've come to the right place.
When I first read about salvage computing, I got very excited. Being part of the DIY Sound community, as a sound practitioner and hardware hacker, Ive developed a growing discomfort with some aspects of the practice. Over the past few years, Ive hosted workshops around circuit bending[^circuit-bending] and LOFI sound devices in and around Rotterdam. These workshops are meant as an accessible way to get people tinkering with electronics, through something infinitely playful: making instruments[^playful].
When I first read about salvage computing, I got very excited. Being part of the DIY Sound community, as a sound practitioner and hardware hacker, Ive developed a growing discomfort with some aspects of the practice. Within the DIY Sound community, DIWO workshops are a common way of sharing knowledge [@richardsDIYMakerCommunities2017], covering a wide range of topics, from the construction to bending and hacking and live coding. Over the past few years, Ive hosted workshops around circuit bending[^circuit-bending] and LOFI sound devices in and around Rotterdam. These workshops are meant as an accessible way to get people tinkering with electronics, through something infinitely playful: making instruments[^playful].
[^circuit-bending]: the practice around hacking discarded toys to find sonic potential through creating shorts, or sometimes literally bending the circuit.
[^playful]: Making instruments is an engaging way to learn about and work with the flow of electricity
[^playful]: Making instruments is an engaging way to learn about and work with the flow of electricity.
In an ecosystem where a printer is only printing with a costly subscription [^printer-subscription], disruptive products become obsolete within a year[^AI-pin], fixing your own flat tires is outsourced [^swapfiets] and some smartphones literally have to be frozen to be able to replace the battery [^frozen], its clear were no longer in charge of our own devices. Warranty-void stickers and lengthy terms and conditions scare us into compliance.
Ive noticed how empowering these first-time soldering workshops can be in taking back this autonomy by making (or breaking) a circuit together. They are a shared attempt to uncover some of the black boxes in our own products [@hertzZombieMediaCircuit2012]. However, the toys and materials used in the workshops are single-use [^single-use] and, with ease, thrown out afterward. The carelessness notion creeps in that waste has no value, and is easily replaceable, and broke my heart a bit, one workshop at a time.
First time soldering workshops can be very empowering in taking back this autonomy by making (or breaking) a circuit together[^exchange]. They are a shared attempt to uncover some of the black boxes in our own products [@hertzZombieMediaCircuit2012]. However, the toys and materials used in the workshops are single-use [^single-use] and, with ease, thrown out afterward. The carelessness notion creeps in that waste has no value, and is easily replaceable, and broke my heart a bit, one workshop at a time.
[^exchange]: Especially during a [workshop in collaboration with the kunsthal](https://www.kunsthal.nl/nl/plan-je-bezoek/activiteiten/friday-night-live-operator/), where it was the first time making a circuit for many attendees. It was great to see how people without much electronics experience figured out circuit making and playing, together.
[^printer-subscription]: HPs “all-inclusive” printers can only be used with an active subscription [@hachmanNightmareRealHP2024].
[^AI-pin]: Humane Inc. Ai Pin closed their servers within one year after releasing their *A.I. Pin*. Now, you can only ask this piece of hardware how many batteries it has left. [@chokkattuWhatYourDefunct2025]
[^AI-pin]: Humane Inc. Ai Pin closed their servers within one year after releasing their *A.I. Pin*. Now, you can only ask this piece of hardware how many batteries it has left [@chokkattuWhatYourDefunct2025].
[^swapfiets]: Swapfiets promote their bike subscriptions as “We give you a bike that you never have to repair”
[^swapfiets]: Swapfiets promote their bike subscriptions as “We give you a bike that you never have to repair”.
[^frozen]: The Nothing Phone scored a 1/10 in iFixit's repairability score [@havardEssentialPhoneTeardown2017]
[^frozen]: The Nothing Phone scored a 1/10 in iFixit's repairability score [@havardEssentialPhoneTeardown2017].
[^single-use]: and often require much preparation in terms of collecting, transporting, repairing, testing, and cleaning.
This is where the field guide comes into play: Can we shift the practice of playful tinkering to acknowledge, rather than ignore, the waste streams they are part of? Limiting ourselves to only use salvaged components and discovering; is it possible to live off (create with) electronic components salvaged in the wild? And what would such a practice entail?
Because salvage is not just about reusing materials; but about confronting the systems that create the waste in the first place. Not only the obsolete media but also the by-product of the entire production lifecycle of an electronic product; From the mining of minerals that make up the hardware to the inevitable disposal site [@gabrysSalvage2012]. Since the rate at which waste is collected and recycled isn't growing at the same pace as our collective buying and production, the landfills will continue to grow. Parikka even goes as far to say as that recycling is ultimately "trade-waste", where our abandoned devices are shipped across the ocean <ins>hier moet nog wat achter</ins>[@parikkaDustMatter2012].
Because salvage is not just about reusing materials; but about confronting the systems that create the waste in the first place. Not only the obsolete media but also the by-product of the entire production lifecycle of an electronic product; From the mining of minerals that make up the hardware to the inevitable disposal site [@gabrysSalvage2012]. Since the rate at which waste is collected and recycled isn't growing at the same pace as our collective buying and production, the landfills will continue to grow. Parikka even goes as far to say as that recycling is ultimately "waste-trade", where our abandoned devices are shipped across the ocean [@parikkaDustMatter2012].
## Beyond the kit
The preference for buying new is noticeable in the DIY synth community as well. When publishing a project, it's common to share a pre-filled webshop cart along with the schematics or even sell it as a pre-compiled kit[^KIT]. To me, this goes against the ethos of DIY that resonates with me the most: making do with what you have, with a focus on doing, and not the outcome [@hertzArtDIYElectronics2023]. Instead, a whole new market is created consisting of Lego-like kits. These kits gloss over the actual challenges and difficulties of creating sound devices, preventing the development of much-needed problem-solving skills, and not actually discovering anything new [@CooperativeExperimentalismSharing].
The preference for buying new is noticeable in the DIY synth community as well. When publishing a project, it's common to share a pre-filled webshop cart along with the schematics or even sell it as a pre-compiled kit[^KIT]. To me, this goes against the ethos of DIY that resonates with me the most: making do with what you have, with a focus on doing, and not the outcome [@hertzArtDIYElectronics2023]. Instead, a whole market is created for Lego-like kits. These kits gloss over the challenges and difficulties of creating sound devices, preventing the development of much-needed problem-solving skills, and not actually discovering anything new [@CooperativeExperimentalismSharing].
[^KIT]: ![Kit from Bastl Instruments](/chapters/bastl_kit.webp)
Instead, what you will learn to build using this guide is a starting point. Small electronic circuits that produce sound on their own, but can also be duplicated, manipulated, and modulated into something completely different. The chaos is up to you. Some experience with electronics is preferred, as the guide will not go into detail about voltages and amps, or how to solder. There are other, more suitable resources for that. On that note, I am by no means an expert in electronics. This guide represents my personal understanding of electronics, which, in no doubt, contains incorrect assumptions or oversimplifications. It can however offer you insights and practical tools to incorporate salvaging into your own practice.
Instead, what you will learn to build using this guide is a starting point. Small electronic circuits that produce sound on their own, but can also be duplicated, manipulated, and modulated [^disclaimer], while diving into the questions around the practice of salvaging. The guide is tested, tinkered, and tweaked during (un)repair cafe evenings at the Klankschool[^klankschool]. In these hangouts we modify, hack and repair devices together.
Within the DIY Sound community, DIWO workshops are a common way of sharing knowledge [@richardsDIYMakerCommunities2017], covering a wide range of topics, from the construction to bending and hacking and live coding. Where it is not only about sound <ins>afmaken</ins>
[^klankschool]: Klankschool is a loose-knit group of sonic practitioners based in Rotterdam who share a common interest in performances, sound art, improvisation and noise. Everyone involved is a teacher, student, musician, janitor and more. Check the [calendar](https://calendar.klank.school/) for the next event!
In the DIY synth community, DIWO (Do It With Others) is a common way of sharing knowledge. These often very horizontal workshops are a way of skillsharing [^horizontal-workshops]. The field guide is no exception on that, and partly came together during (un)repair cafe events at klank.school. I think these DIWO practices are very powerfull. Not only saves it you from having to make an investment in specific tools, working with electronics and waste can be a frustrating process, and DIWO can help share the leed. Having conversations about the material whilest working with the material cna be a way to deepen the relationship with the mateiral.<ins>afmaken</ins>
[^disclaimer]: *I am by no means an expert in electronics. This guide represents my personal understanding of electronics, which, in no doubt, contains incorrect assumptions or oversimplifications.*
[^horizontal-workshops]: <ins>uitleggen</ins>
Repair is often and historically organised as a social activity - opening up workplaces and sharing knowledge[@matternStepStepThinking2024]. <ins>expand more on the social</ins>. This notion is a major part of the DIY Synth community [@richardsDIYElectronicMusic2013]. By being part of workshops and gatherings around DIY sound and repair I've noticed how empowering these exchanges can be [^exchange]. This guide itself is created during and around so-called *(un)repair nights[^unrepair-night]* at the klankschool[^about-klankschool]. . The frustrating process that can be learning electronics is much better to manage when shared.
[^exchange]: Especially during a [workshop in collaboration with the kunsthal](https://www.kunsthal.nl/nl/plan-je-bezoek/activiteiten/friday-night-live-operator/), where it was the first time making a circuit for many atendees. It was great to see how people without much electronics experience, figured out circuit making and playing, together.
[^unrepair-night]: The (un)repair cafe is a by-weekly hangout at the Klankschool, where we modify, hack and repair devices. Check the [calendar](https://calendar.klank.school/) for the next event!
[^about-klankschool]: Klankschool is a loose-knit group of sonic practitioners based in Rotterdam who share a common interest in performances, sound art, improvisation and noise. Everyone involved is a teacher, student, musician, janitor and more.
This field guide came together during and with the help of (un)repair nights at the klank.school. <ins>uitbreiden</ins>
![A sound device](/chapters/transistorOSC_white.webp){.img--fullpage}
The guide is split up into five chapters, each focusing on a different stage of salvaging for sound devices.
The guide is split up into the different stages of salvaging:
#### 1. Gathering hardware
*We trace where to find discarded electronics, what to look for, and how industry practices like planned and stylistic obsolescence shape what ends up in the trash.*
*We trace where to find discarded electronics and how industry practices shape what ends up in the trash.*
#### 2. Dismantling devices
*Opening up devices to uncover design strategies that prevent access: proprietary screws, glued casings, encryption, and the disappearance of service manuals.*
*Opening up devices to uncover design strategies that prevent access*
#### 3. Components to salvage
*A practical guide to identifying and extracting useful components—motors, sensors, chips—and understanding how their design reflects built-in lifespans and disposability.*
*Identifying and extracting useful components—motors, sensors, chips, while diving deeper in their material.*
#### 4. Recipes for making
*Methods for prototyping, modifying, and reusing salvaged parts*
*Methods for building sound devices.*
#### 5. Taking inventory
*A moment of reflection on what worked, what didnt, and what patterns emerge when working with discarded electronics at scale.*
*Time to clean the workbench and reflect*
Happy scavenging!
![A sound device](/chapters/transistorOSC_white.webp){.img--fullpage}

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@ -5,18 +5,20 @@ slug: true
front: true
---
When salvaging for parts, we are looking for abandoned hardware. Hardware that is still fine on the inside but no longer deemed as functional by its previous owners[^no-longer-functional]. These devices can be a literal goldmine of working parts that could be repurposed, as they probably still function, its the stylistic obsolescence that is the problem.
When salvaging for parts, we are looking for abandoned hardware. Hardware that is still fine on the inside but no longer considered as functional by its previous owners[^no-longer-functional]. These devices can be a literal goldmine of working parts that could be repurposed, as they probably still function, its the stylistic obsolescence that is the problem.
Remy & Huang argue that the core goals of ICT are simply researching new technologies and selling more products [@remyLimitsSustainableInteraction2015]. To achieve the latter, manufacturers have embraced structured obsolescence: the idea that a product has a limited lifespan and ought to be consumed and upgraded within a few years [@sterneOutTrashFuture2007]. This strategy is embedded in the manufacturing, marketing and even the naming of products [^naming]. Its been embedded in consumer culture since the late 19th century, originally invented as a solution for overproduction [@hertzZombieMediaCircuit2012]. As a result, many devices have since been upgraded, replaced, devalued, and thrown out, before ever reaching their full potential [@parksFallingApartElectronics2007]. It is exactly these machines we are looking for. So, where to find them?
[^naming]: Samsung Galaxy S8, iPhone 12s, Dyson V12 Absolute. The naming itself implies theres a next version, making yours outdated by default.
[^no-longer-functional]: The spectrum of "still fine" and "no longer deemed as functional" is very wide; printers with discontinued cartridges, Blu-ray players, the infamous E.T. game that was buried, an iPhone 8 with a bad battery, or Spotifys “Car Thing.”
[^no-longer-functional]: The spectrum of "still fine" and "no longer deemed as functional" is very wide; printers with discontinued cartridges, Blu-ray players, an iPhone 8 with a bad battery, or Spotifys “Car Thing.”
Ive identified 3 strategies for gathering electronic hardware.
#### 1. Institutional discards
Offices, schools, museums, or other companies often replace their hardware every 5 years, whether its broken or not, due to tax incentives<ins>reference: nieuw kopen is ingecalculeerd</ins>. If electronics arent central to their operations, their leftovers often gather dust. Keep your ears open, utilise your network, these forgotten machines could be your best source.
Offices, schools, museums, or other companies often replace their hardware every 5 years, whether its broken or not, due to tax regulations[^regulations]. If electronics arent central to their operations, their leftovers often gather dust. Keep your ears open, utilize your network, these forgotten machines could be your best source.
[^regulations]: Business assets such as laptops and computers are given a depreciation rate of 20%, implying a standard lifespan of 5 years for tax purposes.
#### 2. Browsing the streets
I feel like good waste “comes to you”. Keep your eyes open, look around. Actively going on waste walks has not paid off [^unbinair-waste]. Their chances depend heavily on local waste policies [^should-be-communicated] and activities[^waste-activities].
@ -25,17 +27,17 @@ I feel like good waste “comes to you”. Keep your eyes open, look around. Act
[^waste-activities]: In Rotterdam, there are various WhatsApp & Facebook groups exchanging geo locations for great trash.
[^should-be-communicated]: The municipality waste guide website & app of Rotterdam is not functioning and has not been updated since 2022
[^should-be-communicated]: The municipality waste guide website & app of Rotterdam is not functioning and has not been updated since 2022.
#### 3. Donations from friends & family
As you enthusiastically keep your friends & family in the loop about your salvaging endeavors, youll notice the phenomenon of donations. Since a sizable portion of our replaced computing devices still reside in our storage units, waiting to be of any value, most would be happy to find such a good destination as you [@gabrysDigitalRubbishNatural2011].
As you enthusiastically keep your friends & family in the loop about your salvaging endeavors, youll notice the phenomenon of donations. Since a sizeable portion of our replaced computing devices still reside in our storage units, waiting to be of any value, most would be happy to find such a good destination as you [@gabrysDigitalRubbishNatural2011].
## Infiltrating the waste stream
My attempts to create a consistent waste-income through more official routes have not been successful. These established waste streams, where trash is being collected, organized, and processed in multiple facilities, are difficult to trace. Rotterdam collects e-waste via official centers and drop-off bins, usually placed inside supermarkets. The emphasis is on bringing waste in. What happens after is vague and leans heavily on a promise of a circular economy[^circular-economy].
[^circular-economy]: A model where everything is recycled, nothing is wasted, and new raw materials are never needed. A seductive but mostly mythical narrative, that keeps consumers consuming.
Alternatively, the devices can be returned to the manufacturer through recycling programs. However, its unclear what exactly happens with the recycled material, and is always part of a customer journey [^samsung]<ins>onduidelijke einde zin</ins>. This relieves the consumer of the disposal responsibility but keeps the cycle of buying new unaltered.
Consumer devices can be returned to the manufacturer through recycling programs. Here too, its unclear what exactly happens with the returned devices, and the program is always part of a customer journey [^samsung]. This relieves the consumer of the disposal responsibility but keeps the cycle of buying new unaltered.
[^samsung]: For instance, Samsungs recycle program starts with “Step 1. Buy your new device with trade-in discount on samsung.com”.
@ -44,8 +46,6 @@ Trying to engage with these streams differently, by salvaging, not just discardi
[^solo]: My attempts to establish a relationship with the thrift shop failed. Out of pity I was allowed to snoop in their garbage bin (which was locked away and filled with goodies). Their waste was already part of a monetized system, and my presence didnt fit.
## Pick your battles
When inspecting a device for salvage possibilities, I try to imagine what the inside of the device looks like. What kind of components might I find? Are there any motors or moving parts? What kind of material is the device made of? What time period does it come from? Which companies manufactured the device and its parts? Do I see any use for it now?
Great devices are; things that have an audio input and output, radios, casette players, anything that has parts that move, <ins>hier verder op uitpakken</ins>
When inspecting a device for salvage possibilities, I try to imagine what the inside of the device looks like. What kind of components might I find? Are there any motors or moving parts? What kind of material is the device made of? What time period does it come from? Which companies manufactured the device and its parts? Is there an audio signal on the inside? Do I see any use for it now?
If I dont expect much, Ill leave it for the next person to salvage.

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@ -9,14 +9,14 @@ Once you've found a piece of hardware, it's time to start dismantling the device
#### To open devices
- A set of screwdrivers with various bits and sizes [^bits]
- Plastic spudger or pick — *Used to pry open seams without damaging the casing.*
- Saw or utility knife - *cut through plastic cases or stubborn sections.*
- Plastic spudger or pick — *Used to pry open seams without damaging the casing*
- Saw or utility knife - *cut through plastic cases or stubborn sections*
- Flat pliers - *for heavy duty pulling*
- Drill - *to drill through stuck and damaged screws*
- Tweezers
#### For salvaging & making
- Multimeter — *Tests components for continuity, resistance, or voltage.*
- Multimeter — *Tests components for continuity, resistance, or voltage*
- Soldering iron & solder
- Desoldering pump
- Solder wick
@ -33,15 +33,15 @@ Once you've found a piece of hardware, it's time to start dismantling the device
![Create a toolkit that works for you!](/chapters/toolkit_edited.webp){.img--fullpage}
## Opening up
It's not always clear where to start. Grabbing a heavy duty tool immediatly could result in permanent damage. It is better to start more carefully. In some cases, product manufacturers provide service manuals[^repair-manual]. But in most cases, were left to figure it out ourselves. Fortunately, online communities like IFixIt create their own teardown guides, that can sometimes give us a head start.
It's not always clear where to start. Grabbing a heavy duty tool immediately could result in permanent damage. It is better to start more carefully. In some cases, product manufacturers provide service manuals[^repair-manual]. But in most cases, were left to figure it out ourselves. Fortunately, online communities like IFixIt create their own teardown guides, that can sometimes give us a head start.
[^repair-manual]: These manuals contain valuable information that can help you to understand the device and to take it apart. [![This repair manual that passed the (un)Repair Cafe contains a schematic, disassembly information, parts list and multiple trouble shooting guides](./chapters/trouble-shoot.png)](https://elektrotanya.com/panasonic_rs-768us.pdf/download.html#dl)
Lets take a look at the device. Can you spot any screws? They might be hidden behind warranty stickers[^warranty] or tucked away behind obscure corners. I find it helpful to follow the seams of the casing. Especially with plastic enclosures, its not just screws—look for small tabs or glue holding things together.
Lets take a look at the device. Can you spot any screws? They might be hidden behind warranty stickers[^warranty] or tucked away in obscure corners. I find it helpful to follow the seams of the casing. Especially with plastic enclosures, its not just screws—look for small tabs or glue holding things together.
[^warranty]: Warranty stickers are not legally binding, as warranties are dictated by consumer laws [@aragonWarrantyVoidStickers2023].<ins>komt nog niet helemaal over, terugrelateren over waarom het kut is</ins>
[^warranty]: Warranty stickers seem intimidating but are not legally binding, as warranties are dictated by consumer laws [@aragonWarrantyVoidStickers2023].
![Following the seams of the device](https://placehold.co/600x400)
![Following the seams of the device](/chapters/openingup.webp "Following the seams of the device")
If you manage to create a small slit gap in a seam, insert a thin plastic pic and carefully push it along the seam. There might be small tabs holding the casing together. If the manufacturer really didnt want you to get in there, theyve glued it all up, and it is impossible to get in the device without causing permanent damage[^permanent].
@ -54,15 +54,14 @@ Through design choices like hiding screws, heat stakes[^heat-stakes], strong adh
The act of black boxing are an attempt to keep us unconsciously incompetent, and increases the distance between the consumer and the materiality of the device. The modern laptop is silent, not giving any indication of whatever is happening on the inside, or its material origins. It is only when something breaks, that their materiality becomes a reality again [@hertzZombieMediaCircuit2012] [@emersonSixDifficultInconvenient2021].
[^heat-stakes]: Plastic pins that are melted to hold parts in place
[^heat-stakes]: Plastic pins that are melted to hold parts in place.
It is by opening the devices, however, that we can rediscover materiality. Then it becomes clear that what may appear so robust, seamless, and futuristic on the outside is fragile, breakable and almost futile on the inside. With the Multimeter we can track the traces from the speaker to the microchip to the microphone. Or is there something else in between?
[^inside]: The inside can tell you more about the time the device was made in. For instance, I mostly find aluminum and iron type materials on the inside of older machines.
<ins>wat hier nog een beetje in mist is de eigen practice</ins>
::: {.image-list}
## Discoveries at the (un)repair cafe
![The PCB has used ribbon wires to make an angled connection. This makes disconnecting, and later putting it back, a difficult task](/chapters/angles_2_edited.webp)
@ -73,7 +72,4 @@ It is by opening the devices, however, that we can rediscover materiality. Then
![Manufacturer deliberately obscured the label of this chip](/chapters/obscure_labels.webp)
![The camera contained a variety of screw sizes](/chapters/smallscrews.webp)
### Open Lab
These investigations were done during the open lab in the unrepair cafe.
:::

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@ -6,7 +6,7 @@ nested: "components"
front: true
---
Once youve broken your device down into its individual puzzle pieces, we can zoom in on them more closely. Is there anything that immediatly sparks your interest? Did you already uncover unexpected materials? Chances are you uncovered one or more Printed Circuit Boards (PCBs), and—very generally speaking—some kind of input and output components, all connected by several types of wire[^wires]. For example, inside a digital picture frame I found a power input, a battery, a screen, speakers, a two-sided PCB, and an antenna.
Once youve broken your device down into its individual puzzle pieces, we can zoom in on them more closely. Is there anything that immediately sparks your interest? Did you already uncover unexpected materials? Chances are you uncovered one or more Printed Circuit Boards (PCBs), and—very generally speaking—some kind of input and output components, all connected by several types of wire[^wires]. For example, inside a digital picture frame I found a power input, a battery, a screen, speakers, a two-sided PCB, and an antenna.
PCBs are populated with either “through hole" (THT) or "surface mount" (SMD) components. SMD components are very small and soldered directly onto the board's surface. Their size makes labels hard to read, and theyre designed for automated assembly, making them impractical for salvage[^tried]. Thats why I rarely salvage from computer-type devices. These usually contain nothing but SMD components and lack interesting interactions or mechanical parts.
@ -17,50 +17,52 @@ PCBs are populated with either “through hole" (THT) or "surface mount" (SMD) c
## Desoldering
Desoldering components is generally more difficult than soldering and requires patience and practice. Ironically, desoldering guns are much more expensive than soldering irons, so heres how I do it, without one.
In a well-ventilated[^well-ventilated] room, heat up the blob of solder that connects the component to the PCB using a soldering iron. After a couple of seconds, youll notice the solder becomes liquid[^liquid]. Then, using tweezers or a plier, I carefully pull the leg out from the backside of the board, and then do the same for the other legs. This process can take somewhere between 10 seconds and 10 minutes and can be both frustrating and meditative.
In a well-ventilated[^well-ventilated] room, heat up the blob of solder that connects the component to the PCB using a soldering iron. After a couple of seconds, youll notice the solder becomes liquid[^liquid].
[^liquid]: How fast this happens depends on the temperature of the soldering iron and the melting point of the solder that is on the board. If it wont melt, adding a bit of your own solder helps.
Then, using tweezers or a plier, I carefully pull the leg out from the backside of the board, and then do the same for the other legs. This process can take somewhere between 10 seconds and 10 minutes and can be both frustrating and meditative.
[^well-ventilated]: whilst modern devices cannot contain lead anymore, older solder will. Do not lick the PCB, clean your hands after and open a window.
[^liquid]: How fast this happens depends on the temperature of the soldering iron and the melting point of the solder that is on the board. If it wont melt, adding a bit of your own solder helps.
## Common components
In the next few pages, Ill briefly address some of the more common components. If you want to know more about what each component specifically does, I recommend *Getting started in electronics* [@mimsGettingStartedElectronics1983].
In the next few pages, Ill briefly address some of the more common components. If you want to know more about what each component specifically does, I recommend Getting started in electronics [@mimsGettingStartedElectronics1983].
Many components, like transistors and chips, have datasheets available online. You can usually find them by entering the part number, often printed directly on the component[^unless], into a search engine. While datasheets can be overwhelming and full of technical jargon, they typically show a pinout, explaining what each leg does, and a description of the component's behavior.
<ins>iets toevoegen over wat we met die componenten die gaan doen</ins>
In the next chapter, well get into making with the salvaged components. The recipes need some specific components, which are highlighted below. It's always wise to have some extra! Components might break, speaking from experience, having to stop because you've run out of working components, is very discouraging.
[^unless]: Since the manufacturer didnt think you ever needed to know which oddly specific chip youre looking at, they sometimes deliberately scratched it off.
::: {.table-wide}
## Overview of common components
| **Name** | **Category** | **Description** | **Found in** | **Symbol** |
|------------------------------------|--------------------------|------------------------------------------------------------------|-----------------------------------------------|----------------------------------------------------------|
| **555 Timer** | Chip | A small chip that generates pulses | Timers, LED dimmers | |
| **Capacitor** | Capacitor | Store a voltage | Everywhere! | ![](./assets/schematics/Capacitor-IEC-Polarized.svg) |
| **Coil** | Passive | These funky components can create sounds on their own | Transformers, relays, wireless charging | ![](./assets/schematics/Inductor-COM-Air.svg) |
| **<mark>Capacitor</mark>** | Capacitor | Store a voltage | Everywhere! | ![](./assets/schematics/Capacitor-IEC-Polarized.svg) |
| **<mark>Coil</mark>** | Passive | These funky components can create sounds on their own | Transformers, relays, wireless charging | ![](./assets/schematics/Inductor-COM-Air.svg) |
| **Crystal Oscillator** | Passive | Generates a frequency that is often used as a clock | Devices that have processors | |
| **Diode** | Passive | Forces current to flow in one direction | Everywhere! | ![](./assets/schematics/Diode-COM-Standard.svg) |
| **Displays** | Output | Display information | Monitors, calculators, embedded systems | |
| **LED** | Output | Emit a small light | Everywhere! | ![](./assets/schematics/Diode-COM-LED.svg) |
| **<mark>LED</mark>** | Output | Emit a small light | Everywhere! | ![](./assets/schematics/Diode-COM-LED.svg) |
| **Logic chips** | Chip | Create logic and switches | Computers, microcontrollers, control circuits | |
| **MOSFET** | Chip | Not sure yet | Power supplies, motor control | |
| **Magnet** | Misc | Electromagnetic applications, motors | Speakers, hard drives | |
| **<mark>Magnet</mark>** | Misc | Electromagnetic applications, motors | Speakers, hard drives | |
| **Microcontroller** | Chip | Programmable chip, for example the ATmega328 | Embedded systems, Arduino, automation | ![](./assets/schematics/Capacitor-IEC-Polarized.svg) |
| **Microphone** | Input | Record sound | Phones, vapes | ![](./assets/schematics/Audio-IEEE-Microphone.svg) |
| **Motor** | Output | Spins when a power is applied | Printers, blenders, vacuums | ![](./assets/schematics/motor.png) |
| **<mark>Motor</mark>** | Output | Spins when a power is applied | Printers, blenders, vacuums | |
| **NPN Transistor** | Transistor | Amplification/switching | Everywhere! | ![](./assets/schematics/Transistor-COM-BJT-NPN.svg) |
| **Op-Amp** | Chip | Amplifying signals | Audio circuits, sensors, control systems | ![](./assets/schematics/IC-COM-OpAmp.svg) |
| **PNP Transistor** | Transistor | Amplification/switching | Everywhere! | ![](./assets/schematics/Transistor-COM-BJT-PNP.svg) |
| **<mark>PNP Transistor</mark>** | Transistor | Amplification/switching | Everywhere! | ![](./assets/schematics/Transistor-COM-BJT-PNP.svg) |
| **Piezo disc** | Ouput/Input | Records or creates vibrations | Buzzers, sensors | |
| **Potentiometer** | Resistor | Limiting voltage through a knob | Volume knobs, light dimmers | ![](./assets/schematics/Resistor-IEEE-Potentiometer.svg) |
| **<mark>Potentiometer</mark>** | Resistor | Limiting voltage through a knob | Volume knobs, light dimmers | ![](./assets/schematics/Resistor-IEEE-Potentiometer.svg) |
| **Relay** | Switch | Switches power | Household appliances | ![](./assets/schematics/Relay-COM-COM-SPDT.svg) |
| **Resistor** | Resistor | Limiting voltage | Everywhere! | ![](./assets/schematics/Resistor-IEEE-Standard.svg) |
| **<mark>Resistor</mark>** | Resistor | Limiting voltage | Everywhere! | ![](./assets/schematics/Resistor-IEEE-Standard.svg) |
| **Speaker** | Ouput | Outputs sound | Toys, (portable) radios | ![](./assets/schematics/Audio-COM-Loudspeaker.svg) |
| **Switches & buttons** | Input | Interact with the device | Light switches, keyboards | ![](./assets/schematics/Switch-COM-SPST.svg) |
| **Thermistor** | Resistor | Limiting voltage dependent on temperature | Not sure yet | ![](./assets/schematics/Resistor-IEEE-Thermistor.svg) |
| **Trimpots** | Resistor | Limit voltage through a small knob adjustable with a screwdriver | Audio circuits, calibration devices | ![](./assets/schematics/Resistor-IEEE-Trimmer.svg) |
| **Voltage regulators** | Chip | Not sure yet | Power supplies, embedded systems | | | |{#link-sf .btn-read-more}
| **Voltage regulators** | Chip | Not sure yet | Power supplies, embedded systems | | | |
:::
<ins>in dit hoofdstuk benoemen dat je extra zooi nodig hebt voor het geval je iet sopblaast</ins>

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@ -6,53 +6,45 @@ front: true
nested: "recipes"
---
# Footnote over triple check valt van het papier
Hopefully, youve salvaged a variety of components by now, and we can start building sound with them. In this chapter you'll find a bunch of recipes; the starting points for sound devices. These modular recipes can be used standalone or connected together into a bigger system. This modularity makes problem-solving slightly easier[^easier], and you can pick and choose your modules based on your salvaged inventory.
Hopefully, youve salvaged a variety of components by now, and we can start to actually build some sound with them. In this chapter you'll find a bunch of recipes; the starting points for sound devices. These modular recipes can be used standalone or connected together into a bigger system. This modularity makes problem-solving slightly easier[^easier], and you can pick and choose your modules based on your salvaged inventory.
[^easier]: Still a headache! But now you only have to triple check a handful of components, instead of 120.
[^easier]: Still a headache! But now you only have to triple check a handful of components, instead of 120
Every recipe contains a paper circuit[^paper-circuit-ciat] to print. These circuits are the blueprint of your device, between a schematic and an industrial PCB. The biggest advantage of using paper, apart from being able to solder the connections of your components right on top of the circuit, is that it is flexible. You can take notes, draw lines, and adjust the schematic as you go.
Every recipe contains a paper circuit[^paper-circuit-ciat] to print. These circuits are the blueprint of your device, between a schematic and an industrial PCB. The biggest advantage of using paper, apart from being able to solder the connections of your components right on top of the circuit, is that it is flexible. You can take notes, draw lines and adjust the schematic as you go. This saves you from either having to use toxic chemicals to etch your own circuit boards, or outsource the development.<ins>laatste zin ff checken</ins>
[^paper-circuit-ciat]: A method introduced by synthesizer builder Ciat Lonbarde, who used paper circuits as a way to distribute circuits and ideas for free @blasserStoresMall2015 .
[^paper-circuit-ciat]: A method introduced by synthesizer builder Ciat Lonbarde, who used paper circuits to distribute his circuits and ideas for free [@blasserStoresMall2015].
### Assembling the circuit
1. Cut out the circuit and fold it in half, creating a two sided print
2. Gather the components listed in the "Bill of Materials" (BOM)
1. Cut out the circuit and fold it in half, creating a two-sided print [^print].
2. Gather the components listed in the "Bill of Materials" (BOM).
3. Populate the first components by pinning the legs through the paper in their designated areas. Keep an eye on the orientation[^orientation]. Start small (resistors) then move to larger parts.
4. Create the connections according to the circuit by soldering the legs together. I've found bare copper wire is the quickest.
4. Create the connections according to the circuit by soldering the legs together using (copper) wire.
5. Repeat until all components are in place!
6. Test & triple-check all connections [^triple-check].
[^print]: printing on thicker paper is advised
[^orientation]: Some capacitors, LED's and other components all have a specific polarity/orientation.
[^triple-check]: With salvaged components you'll have a limited supply. Test to prevent component loss.
There is no need to understand every single component on each recipe [^no-need], but try to follow the connections on the circuit. Which road is the audio signal taking? This will help you a lot with troubleshooting.
There is no need to understand every single component on each recipe [^no-need] but try to follow the connections on the circuit. Which road is the audio signal taking? This will help you a lot with troubleshooting.
[^no-need]:Rule #17 from Handmade Electronic Music states "If it sounds good and doesnt smoke, dont worry if you dont understand it." @collinsHandmadeElectronicMusic2009.
[^no-need]: Rule #17 from Handmade Electronic Music states, "If it sounds good and doesnt smoke, dont worry if you dont understand it." [@collinsHandmadeElectronicMusic2009].
### !Safety notes!
!Safety notes!
- **Audio can be surprisingly loud**. Use small speakers (never headphones![^headphones]) you wouldnt miss if they break, and keep your hand on the volume dial when plugging in your sound device for the first time
- **Use batteries**. Plugging into a wall (120V) can be incredibly dangerous. Always unplug the power from the circuit when making changes, to prevent shorts
- **Audio can be surprisingly loud**. Use small speakers (never headphones! [^headphones]) you wouldnt miss if they break and keep your hand on the volume dial when plugging in your sound device for the first time.
- **Use batteries**. Plugging into a wall (120V) can be incredibly dangerous. Always unplug the power from the circuit when making changes, to prevent shorts.
- **Watch that smell**. “Magic smoke” has a certain smell. Unplug immediately when something smells/smokes!
- **Two know more than one**. If you're not sure, invite a friend and I'm sure you'll figure it out together
- **Two know more than one**. If you're not sure, invite a friend and I'm sure you'll figure it out together.
[^headphones]: Your hearing is precious, and accidently blasting an overpowered sine-wave Through your ears can cause permanent damage.
[^headphones]: Your hearing is precious, and accidentally blasting an overpowered sinewave Through your ears can cause permanent damage.
### Finding & scaling recipes
The DIY synth community is not shy in sharing their schematics. There are fantastic resources online, such as the [Experimentalists Anonymous DIY Archives](https://experimentalistsanonymous.com/diy/index.php) the [wiki](https://sdiy.info/wiki/Synth_DIY_Wiki), [Music from Outer Space](https://musicfromouterspace.com/) and *Handmade Electronic Music* [@collinsHandmadeElectronicMusic2009]. However, finding resources using salvaged components can be tricky, as our requirements are a bit different then the average github browser. Most schematics either contain 20+ components or require (specific) chips. For making personal synthesizers, this limitation has been interesting, as it forces me to turn the VCO recipe into a self-modulating instrument, actually helping me to learn more about elecontrics & elecontric sound then any pre-made kit could ever do, but there is definetly a scsaling issue. Initially I had set out to use this research as a way to develop a workshop format about making synthesizeres with e-waste, and in that way "fixing" my issues with the wastefullness of the workshop.
But, maybe this is not possible, and maybe that is okay.
<ins> unpack on this en dan doorpakken in de conclusie</ins>
<ins>ff kijken hoe je deze links kunt reference</ins>
<ins>wat is vco</ins>
### Finding recipes
The DIY synth community is not shy in sharing their schematics. There are fantastic resources online, such as the Experimentalists Anonymous DIY Archives the wiki, Music from Outer Space and Handmade Electronic Music [@collinsHandmadeElectronicMusic2009]. However, finding resources using salvaged components can be tricky, as our requirements are a bit different. Most schematics either contain 20+ components or require (specific) chips, which have proven to be difficult to find. This limitation has been interesting, as it forces me to experiment with smaller schematics. Turning the oscillators into self-modulating instruments, by attaching them together using alligator clips, actually helped me to learn more about electronics & sound than any pre-made kit could ever do.
<ins>bij de BOM de links naar components er uit halen</ins>
![Combine multiple recipes to create a self-modulating glitch device!](/chapters/croc.webp){.img--fullpage}
<ins>Dirty electronics talks about scale in electronics, “With the ever-decreasing size and miniaturisation of electronics, the work of Dirty Electronics often attempts to re-size technology to human scale. The idea expressed by David Tudor of composing inside electronics is re-addressed with the intention of thinking of composing outside electronics, where a music driven by electronics is also” [@richardsDIYElectronicMusic2013]</ins>
<span class="fix-break-left"></span>

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@ -1,113 +1,23 @@
---
title: “Taking inventory”
title: "Taking inventory"
type: Chapter
slug: true
---
<span template-type="chapter"></span>
<!--
After all the dismantling, salvaging, desoldering, and re-making, its time to take inventory. For me, this is the moment to sit in the middle of a workshop, surrounded by the carcasses of printers, cassette recorders, and radios, and deal with the remainders. Can we shift the practice of playful tinkering to also account for the waste streams it engages with?
🔧 15 Best Bits for Your Conclusion
“Can we shift the practice of playful tinkering to acknowledge, rather than ignore, the waste streams they are part of?”
(p. 2 sets up your thesiss central question)
In the DIY synth community, tinkering often happens collaboratively, through workshops where participants solder prefabricated kits, as an accessible entry point into electronics. When I started the field guide, I imagined creating a similar format, but using only salvaged components. Logistically, that turned out to be much harder than expected:
“Limiting ourselves to only use salvaged components and discovering; is it possible to live off (create with) electronic components salvaged in the wild?”
(p. 2 hits your core exploration of constraint and possibility)
#### Waste streams are difficult to tap into
“Because salvage is not just about reusing materials; but about confronting the systems that created the waste in the first place.”
(p. 2 this line slaps and goes deep into critique)
The circular economy, often marketed as a fix for the mountains of e-waste, is structured to keep the consumer lifecycle of buying intact. There is no method in place for taking waste, meaning we must revert to using what comes on our path or is donated. Which is a lot, but not consistent.
“Instead, a whole new market is created consisting of Lego-like kits. These kits gloss over the actual challenges and difficulties of creating sound devices.”
(p. 3 critical insight into consumer-friendly DIY)
#### Salvaging the right components
“This guide represents my personal understanding of electronics, which, in no doubt, contains incorrect assumptions or oversimplifications.”
(p. 3 humble, open, and very human)
Most synths built in workshops rely on chips like the 555 timers and op-amps. These chips simplify builds, lower the total amount of components needed, increasing the chances of a participant completing the circuit. In the past few months, I havent salvaged a single 555 timer, and only a handful of op-amps. That is not nearly enough to provide a group of participants with components.
“By being part of workshops and gatherings around DIY sound and repair Ive noticed how empowering these exchanges can be.”
(p. 4 community as empowerment)
But maybe these limitations can also be an opportunity. If we let go of the expectation that everyone would walk out with a polished synthesizer, similar to those that can be bought in shops, new possibilities open up. The constraints of using e-waste as material can help us to think differently—to engage with different contexts or reimagine how existing technologies might be repurposed. Instead of following a set in stone schematic, the recipes are a starting point, which everyone can execute differently.
“Good waste comes to you.”
(p. 9 beautifully phrased philosophy of scavenging)
Fennis urges us to rethink waste, not just as a pile of discarded phones, but as the material it was before, including the toxic, environmentally catastrophic legacy. Through reverse engineering and hacking, they explore the material and learn what the technologies can do other than what it was designed for[@fennisOntologyElectronicWaste2022]. In other words, by dismantling a wired electronic razor, that was deemed obsolete and replaced for a battery powered razor, we can remove the abstraction layer and see that it is actually a blade, a power supply, and a motor, which in turn can become an instrument. In this way, we can see the end-of-life of a device, where the consumer is done consuming, as a moment of celebration, and give it an afterlife [@mansouxPermacomputingAestheticsPotential2023]!
“Solo salvaging is not invited in this transaction.”
(p. 10 sharp critique of circular economy theatre)
“The manufacturer really does not want you in there.”
(p. 15 accessible and damning)
“It is only when something breaks, that their materiality becomes a reality again.”
(p. 15 poetic and grounded)
“Shredding a phone doesnt just lose raw material; it erases the labor, energy, and environmental costs embedded in its original creation.”
(p. 32 devastatingly clear)
“Our practice—building instruments, experimenting with electronics—sits outside this loop. Its not just post-consumption; its pre-production.”
(p. 33 great positioning of your practice)
“Making personal synthesizers … actually helped me to learn more about electronics & electronic sound than any pre-made kit could ever do.”
(p. 41 a big endorsement of the messy route)
“If it sounds good and doesnt smoke, dont worry if you dont understand it.”
(p. 41 timeless rule, via Handmade Electronic Music)
“Getting a single sound out of anything is such a eureka moment.”
(p. 47 joyful and relatable)
Deze vraag moet je beantwoorden: This is where the field guide comes into play: Can we shi<68>t
the practice of playful tinkering to acknowledge, rather
than ignore, the waste streams they are part of? Limiting
ourselves to only use salvaged components and
discovering; is it possible to live o <20> (create with)
electronic components salvaged in the wild? And what
[5] Swapfiets promote their
bike subscriptions as “We
give you a bike that you
never have to repair”↩
2017)↩
would such a practice entai
het feit dat waste steeds meer verwijderd wordt van straat zegt ook iets over de materialituy van waste. we willen er liever niets mee te maken hebben. -->
<!-- Artist & reverse engineer Maurits Fennis calls for a change of question where, instead of inventing more products to “solve” the e-waste crisis, we rethink what e-waste is in the first place? [@fennisOntologyElectronicWaste2022] -->
<!-- <ins>I would like to include more about the Right to Repair, and how the manual could be part of the object itself (page 14 of [@matternStepStepThinking2024] en pagina 2 van [@parksCrackingOpenSet2000])</ins> --> -->
<!-- While there are many attempts to overcome obsolescence, such as the modular laptop Frameworkand another example, none have quite stuck. Remy & Huang say that, since abscolescence is the outcome of ICTs main goals; research in new technologies and selling more products [@remyLimitsSustainableInteraction2015], most of the proposed soliutions work against one of the two.
Verder is het dus zo dat je eigenlijk hier een beetje moet herhalen de pareltjes van de tekst. Dus meer herhalen van dingen en minder hier pas conclusies trekken. -->
Hopefully by now youve managed to build and explore some raging sound devices! For me, this is the moment to sit in the middle of a workshop surrounded by carcesses of printers, cassette recorders and radios, and deal with the remainders. It becomes clear how the actions are a small intervention in the bigger lifecycle of waste. We extended the life of the hardware for a bit and created the moment of celebration [@lulinvegaPermacomputing], and now the majority [^majority]of the hardware will continue on their cycle.
[^majority]: Majority in terms of size. Im strategically keeping all components, but keeping the plastic carcas of an CD Player/Radio just does not make sense.
### Difficulties in salvaging
During the dismantling of the devices in chapter 1, we discovered, through threatening stickers, obscure bits and strong glue that many of the devices did not want to be opened. Their plastic containers are very “final” forms, every attempt to drill or cut results in rough scars rather than a transformation of form.
Instead of modifying the salvaged device after its consumed, the possibility for appropriation should actually already be in the blueprint during the design process, before its even built [@gabrysSalvage2012]. Manufactures, both of end products and materials, should carry a responsibility for their objects, not only during the manufacturing but extended to the entire lifecycle.
Unfortunately, as Remy and Huang discuss, *unintentional absolescence*, is built into the system. The two main goals of the IT industry, research new technologies and sell more products, actively work against many attempts of improving repair and reuse [@remyLimitsSustainableInteraction2015][^against]. Some major product companies, such as Coolblue, Apple and Samsung, have started recycling programs. However, its unclear what exactly happens with the recycled material, and is always part of a buying process [^samsung]. This relieves the consumer of the responsibility of disposing their product, but keeps the cycle of buying new intact.
[^against]: For instance 3D printing company Bambu Lab recently released reusable PCBs, to make toys out of 3d prints. The only reusable thing about it, is that you could reuse it within their product line. More reusable would be if they used an Arduino instead. Its always “Buy our new product that you could reuse for something else” and never “reuse something else and dont buy our new product”. <ins>niet duidelijk reuse something else regardless</ins>
[^samsung]: For instance, [Samsungs recycle program](https://www.samsung.com/nl/inruil/) starts with *“Stap 1. Koop je nieuwe toestel met inruilvoordeel op samsung.com”*.
## Regulations
But hopefully salvaging will become somewhat easier in the upcoming years, due to regulation pushed by the Right to Repair movement in the EU. A new *Battery Regulation* requires batteries to be removable without specialised tools in 2027. Spare parts should be available longer (depending on the type of device), and the *Ecodesign regulations* dictate which parts should be replaceable, the level of expertise needed for the replacement and if specialty tools are required. <ins>lange zin</ins>
The regulations are limited to specific product groups, and mostly focussed towards consumer products such as phones, televisions and fridges.
With all of these repairable products, wed still need the skills and the services to repair them. Martine Postma, initiator of the first Repair Cafe, advocates to teach repair as skill in high school, and create more opleidingen tot repair person, as the amount of people being able to perform repairs, is also lowering rapidly. Additionally, she argues that the taxes scale between buying a new product and paying for a repair is out of balance, causing repair to be the lesser option money wise. [@postmaWeggooienMooiNiet2015]
With more repairable products, wed still need the skills and services to fix them. Martine Postma, founder of the first Repair Café, advocates for teaching repair skills in schools and creating more training programs for repair professionals, as the number of skilled repairers is rapidly declining. She also argues that the tax system unfairly favors buying new products over repairing old ones, discouraging repair. [@postmaWeggooienMooiNiet2015]
## Room to salvage
When we desoldered all of the capacitors, resistors, chips and whatnot in chapter 3, I was happily surprised with how many of them still worked. most of the broken devices only had one or two faults in them, yet were thrown out in their entirety. This makes them a great resource for salvaging.
Using salvaged components to create sound devices has been and still is a research with ups and downs, and —Im really curious how it went for you! Having limited resources does not always help with the learning process. Blowing up the last op-amp (again) can be seriously discouraging. But at the same time, salvaged components can spark creativity, as they include the history of the device that is was part of before [@hertzZombieMediaCircuit2012]. A switchboard salvaged from a casette recorder from the 80's ignite does more than store-bought one.
pagina 13 [@luUnmakingElectronicWaste2024]
It is this kind of tinkering that I think will make us more resilient against the ongoing attempts by major companies and manufacturers to keep us locked out of our devices [@luUnmakingElectronicWaste2024]. For me, that means not just rethinking waste but also questioning the workshop format itself—and whether I want to keep using the format with it. And the truth is, I dont think so. I see much more to explore in collaborative spaces such as the (un)repair cafe. This means, this is not the end of the field guide! Its the beginning. There are many more alligator clips to connect.

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@ -11,25 +11,25 @@ schematicSymbol: https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/IEEE_
alsoKnownAs: "knob, pot, potentiometer, variable resistor, dial"
---
Youll find resistors in nearly every electronic device and schematic. Its useful to keep a wide range of values around, from 1Ω up to 10 million Ω. Their colored bands indicate their value<ins>waar kun je dat vinden</ins>. In my experience, their values on schematics are usually an indicator, and you can divert slightly without too much impact on your project.
Youll find resistors in nearly every electronic device and schematic. Its useful to keep a wide range of values around, from 1Ω(ohm) up to 10 million Ω. Their colored bands indicate their value[^value]. In my experience, their values on schematics are usually an indicator, and you can divert slightly without too much impact on your project.
Variable resistors—like photoresistors and potentiometers—are especially worth salvaging, along with their knobs[^knobs]. They make your circuit interactive with your circuit.<ins>yes, niets meer aan doen</ins>
[^value]: Each color represents a number or a multiplier. A table of this can be found online.
Variable resistors—like photoresistors and potentiometers—are especially worth salvaging, along with their knobs[^knobs]. They can make your circuit interactive, by replacing fixed resistors with variable ones. This is also a common circuit bending technique, as with older toys the pitch of a sample is often regulated by a *pitch transistor*, replacing this with a variable one allow you to control the playback speed into drone like sonic realms[^pitch-resistor].
[^pitch-resistor]: With more modern toys, this is no longer the case, lowering the number of mods you can do on a toy.
[^knobs]: I've found a lot of old gas stoves left out for trash collection. They often have nice knobs, that can be pulled off without need for tools.
### Types of resistors
- Carbon or metal film resistor
*Comes in different values, marked with color bands*
- Photoresistor
*Changes resistance based on amient light levels.*
- Potentiometer
*A knob-controlled resistor.*
- Stereo potentiometer
*Controls two channels at once, often used for stereo audio.*
- Slide potentiometer
*A slider-controlled resistor.*
- Trimpot
*A small, precise variable resistor you adjust with a screwdriver, used for circuit calibration.*
- Thermistor
*Changes resistance based on temperature.*
<ins>ff alle lijsten checken met wanneer ze wel niet met een punt moeten eindigen - ook footnotes</ins>
:::{.table-inline}
| Component | Description |
|-----------------------|-------------------------------------------------------------------------|
| Carbon or metal film resistor | Comes in different values, marked with color bands |
| Photoresistor | Changes resistance based on ambient light levels |
| Potentiometer | A knob-controlled resistor |
| Stereo potentiometer | Controls two channels at once, often used for stereo audio |
| Slide potentiometer | A slider-controlled resistor |
| Trim pot | A small, precise variable resistor you adjust with a screwdriver, used for circuit calibration |
| Thermistor | Changes resistance based on temperature |
:::

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@ -11,10 +11,10 @@ schematicSymbol: https://upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Types
alsoKnownAs: "cap, condenser"
---
Capacitors come in all sizes. Ive seen ones as big as a coffee cup, and SMD types so small theyre barely visible. Like resistors, these passive components appear in nearly all circuits and store small amounts of electricity. This is measured in farads (F).
Capacitors come in all sizes. Ive seen ones as big as a coffee cup, and SMD types so small theyre barely visible. Like resistors, these passive components appear in nearly all circuits and store limited amounts of electricity. This is measured in farads (F).
:::{.table-inline}
| Capacitor Type | Typical Value Range | Polarised |
| Capacitor Type | Typical Value Range | Polarized |
|-----------------------|-------------------------|-------|
| Ceramic | 1 pF 100 nF | No |
| Electrolytic (Aluminum)| 0.1 µF 10,000 µF | Yes |
@ -29,4 +29,4 @@ Electrolytic capacitors dont age well. Left unused, they have a lifespan of 2
[^malfunction]: Surprisingly, most of the capacitors that Ive tested (that didnt visually leak) passed the test and were still usable, even the electrolytic ones.
You can verify the capacitor's capacitance with a multimeter. In continuity mode, which beeps if theres a connection, touch both legs of the discharged capacitor with the probes. You hear no sound, or a continuous volume/pitch: the capacitor is dead. Otherwise, its fine.<ins>hele lange zin</ins>
You can verify the capacitor's capacitance with a multimeter. In continuity mode, which beeps if theres a connection, touch both legs of the discharged capacitor with the probes. If you hear no sound, or a continuous volume/pitch: the capacitor is dead. Otherwise, its fine.

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@ -3,7 +3,7 @@ title: Chips
type: Chip
description: This is the description
images:
- src: ./components/chip.webp
- src: ./components/chips.webp
alt: 'A chip sooooo small the picture has to be blurry'
usage: Being a black boxed monolith
whereToFind: Everywhere!
@ -14,19 +14,18 @@ Chips, or integrated circuits, are tiny black boxes packed with microscopic comp
Don't let the size fool you! The creation of a chip, from toxic chemicals to the black container, involves around 300 steps, during which 99% of material byproduct is discarded, creating hazardous waste sites [@gabrysDigitalRubbishNatural2011]. So, if there is one part worth salvaging, its this one.
Unfortunately, as modular as they might seem, reusing chips is not plug 'n play. While some are common and well-documented, most are obscured and specific. For instance, reusing the network chip found in a USB phone can lead to a rabbit hole of reverse engineering. And then you find another phone that has a slightly different chip, and the process starts all over again.
Unfortunately, as modular as they might seem, reusing chips is not plug 'n play. While some are common and well-documented[^expectations], most are obscured and specific. For instance, reusing the network chip found in a USB phone can lead to a rabbit hole of reverse engineering. And then you find another phone that has a slightly different chip, and the process starts all over again.
### Common chips to look out for[^expectations]
- 555 Timer
*This chip can generate audible pulses. This can be used as a sound source on its own, or to trigger other circuits, or control motors.*
- Op-Amps (e.g., TL072, TL074, LM358)
*Op-amps are used to amplify signals, and therefore used in loads of sound-related applications*
- CD40106
*A Schmitt trigger inverter can generate audible frequencies that can be tuned. They are often the core of oscillator schematics.*
- CD4017
*A Decade counter is often used for linear step sequencers.*
- microcontrollers
*If youre lucky, you can reflash the microcontroller and write your own program.*
[^expectations]: In the last 6 months of searching, Ive found only a couple of op-amps, one trigger inverter (that I blew by placing it upside-down), and no 555 timers...
[^expectations]: In the last 6 months of searching, Ive found only a couple of op-amps, one trigger inverter (that I blew by using it upside-down), and no 555 timers...
<ins>using it is gekke</ins>
### Common chips to look out for
:::{.table-inline}
| Component | Description |
|--------------------------|-----------------------------------------------------------------------------------------------|
| 555 Timer | *This chip can generate audible pulses. This can be used as a sound source on its own, or to trigger other circuits, or control motors* |
| Op-Amps (e.g., TL072, TL074, LM358) | *Op-amps are used to amplify signals, and therefore used in loads of sound-related applications.* |
| CD40106 | *A Schmitt trigger inverter can generate audible frequencies that can be tuned. They are often the core of oscillator schematics.* |
| CD4017 | *A Decade counter is often used for linear step sequencers.* |
| Microcontrollers | *If youre lucky, you can use the microcontroller to write your own program.* |
:::

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@ -1,19 +1,13 @@
---
title: Inputs
title: Inputs & outputs
type: Inputs
description: This is the description
images:
- src: ./components/Resistors.JPG
alt: 'This would be a great alt text'
- src: ./components/inputoutput.webp
alt: 'A variety of input and output components'
---
Inputs and outputs are often the most visible parts of an electronic device—and among the most accessible to salvage. They are the parts that are most often visible on the outside and thus carry the cultural context of the device. But this visibility is a double-edged sword: it risks turning salvaging and recycling into solely aesthetic choices.
Inputs and outputs are often the most visible parts of an electronic device—and among the most accessible to salvage. It is with these components that salvaging often begins (and ends), because they are the parts that are most often visible on the outside, and thus carry the cultural context of the device. But this visibility is a double-edged sword: it risks turning salvaging and recycling into solely aesthetic choices, causing the possibility of *greenwashing* your practice.<ins>explain greenwashing</ins>
Recycling facilities, manufactures and product design universities often tend to focus on recycling, when talking about reducing e-waste. But among the levels of circularity reduce, reuse, repair, recycle, refuse, recycling is the least effective. More than half of material is lost when going through the recycling process and often involves shipping waste to countries with cheaper labor costs and fewer environmental regulations, resulting in toxic conditions for both workers and the environment [@ifixitRecyclingDestruction] [@gabrysDigitalRubbishNatural2011] [@rouraCircularDigitalDevices2021]. Shredding a device doesnt just lose raw material; it erases the labor, energy, and environmental costs embedded in its original creation. And then a new device replaces it.
Recycling facilities, manufactures and product design universtiries often tend to focus on *recycling*, when talking about reducing e-waste. But among the levels of circularity _reduce, reuse, repair, recycle, refuse_, recycling is the least effective. More than half of material is lost when going through the recycling process, and often includes the shipping of the waste to countires where labour is cheap and less environmental laws causing a toxic process for the workeres and the environemnt[@ifixitRecyclingDestruction] [@gabrysDigitalRubbishNatural2011] [@rouraCircularDigitalDevices2021]. For exmaple, shredding a phone doesnt just lose raw material; it erases the labor, energy, and environmental costs embedded in its original creation. And then—often—a new phone replaces it. <ins>spellcheck</ins>
Our practice—building instruments, experimenting with electronics—sits outside this loop. Its not just post-consumption; its _pre-production_. We're back at the beginning, making something new from what already exists. Thats why how we present our instruments matters. Not as market-ready eco-products with cheerful music, but as a refusal to pretend reuse is clean or easy. Recycling is the last resort. Making is the first.
<ins>ifixit uitleggen?</ins>
<ins>ifixit landingspagina heeft geen date</ins>
Richards argues that *Object Hood* is the central theme of DIY/repurposing. Through hacking and bending you can amplify certain propoperties of the object. [@richardsDIYMakerCommunities2017]. Through the use of piezo discs, where you can amplify the material, or utalising the electromagnetic field, found in dc motors.<ins>beetje random hier</ins>
Instead of focusing on the visual esthetic that is visible on the outside of the original device, I think it's more interesting to focus on what made the object the object. According to Richards, this objecthood is the central theme of DIY/repurposing. Through hacking and bending we can amplify certain properties of the object [@richardsDIYMakerCommunities2017]. Turning a printer into a live coded instrument for instance, amplifying the scratches a piece of stuck paper can make.

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@ -4,13 +4,13 @@ type: PCB
description: This is the description
images:
- src: /components/PCB_1.webp
alt: 'Need to include more different PCBs'
alt: 'PCB with labeled parts'
- src: /components/PCB_2.webp
alt: 'Need to include more different PCBs'
alt: 'Thicker and handdrawn traces'
- src: /components/pcb_3.webp
alt: 'Need to include more different PCBs'
alt: 'Smaller components are difficult to desolder'
- src: /components/ASN_with_blob.webp
alt: 'Need to include more different PCBs'
alt: 'The blob cannot be removed'
usage: The circuit exists on the PCB
whereToFind: Everywhere!
@ -19,14 +19,17 @@ alsoKnownAs: "Protoboard, breadboard, circuit"
Printed Circuit Boards, or PCBs, are the panels on which the electronic circuit is placed. Older boards often reveal hand-drawn traces, which are much more fluid in design. With computerized PCB design, those lines straightened out. Most PCBs are made from FR4 (glass fiber and epoxy)[^fiberglass].
[^fiberglass]: Fiberglass is very strong, but can be sawn through. When sawing, make sure you wear the right protection, microfibers can end up anywhere.
[^fiberglass]: Fiberglass is very strong, but can be sawn through. When cutting, make sure you wear the right protection, microfibers can end up anywhere.
The copper tracks on a PCB are usually covered with a green protective layer, known as solder mask. Sand this off to expose the copper underneath, ready to solder onto again.
Most boards are labeled. They can include a date, information about connections, component numbering[^component-numbering], and sometimes even their their values [^monotron].
Most boards are labeled. They can include a date, information about connections, component numbering[^component-numbering], and sometimes even their values [^monotron].
Not all PCBs follow the industrial template. Artists and other tinkerers have come up with alternatives: the paper circuits of Ciat-Lonbarde, or Dirty Electronics boards made from wood and nails. These kinds of formats offer a more punk-diy way of publishing projects, where the format is not set in stone. Paper can be cut, nails can be moved, inviting a maker to explore the circuit more than just soldering a pre-compiled kit.[@blasserStoresMall2015][@richardsDIYElectronicMusic2013] For our circuits, these approaches are ideal—still flexible, still open to change.
Not all PCBs follow the industrial template. Artists and other tinkerers have come up with alternatives: the paper circuits of Ciat-Lonbarde, or Dirty Electronics boards made from wood and nails. These kinds of formats offer a more punk-diy way of publishing projects, where the format is not set in stone. Paper can be cut, nails can be moved, inviting a maker to explore the circuit more than just soldering a pre-compiled kit [@blasserStoresMall2015] [@richardsDIYElectronicMusic2013].
[^component-numbering]: The schematic contains references to the component number, helping with debugging.
[^monotron]: Some devices take this idea further. The Korg Monotron includes extra patch points directly on the board for DIY mods and expansions.
### Protective
Did you spot "the Blob" on one of your PCB's? The blob (fig 17) is meant to protect certain bare parts of a PCB, but is also known as a type of reverse engineering protection. Another method of protection is applying a transparent layer across the entire board, preventing you from poking around with a multimeter.

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@ -3,7 +3,7 @@ title: Transistors
type: transistor
description: This is the description
images:
- src: ./components/TransistorsED.webp
- src: ./components/transistor.webp
alt: note to self, not sure all of these are transistors
usage: "A transistor is a switch that is controlled through voltage"
whereToFind: Everywhere!
@ -15,6 +15,8 @@ A transistor is a tiny switch that controls a large current with a smaller one.
[^bend-transistor]: In sound circuits, touching a transistor heats it up, which can alter the sound.
The transistor is often seen as an accelleration point in computing history. It replaced big and expensive vacuum tubes, paving the way for portable radios, cheap toys, and eventually the silicon chip. Theories like Moore's law[^moore] creates an expectation of constant upgrading, where your computer will be obsolete in two years time, and the illusion of infinite growth.
The transistor is often seen as a turning point in computing history. It replaced big and expensive vacuum tubes, paving the way for portable radios, cheap toys, and eventually silicon chips. Theories like Moore's law[^moore] create an expectation of constant upgrading, where your computer will be obsolete in two years' time, and the illusion of infinite growth.
This miniturization of components did not result in a more efficicient use of technology. On the contrary, Jevons Paradox shows that increased efficiency in the production process would lead to even more resource consumption. [@remyLimitsSustainableInteraction2015] [@gabrysDigitalRubbishNatural2011] [@parksFallingApartElectronics2007]
[^moore]: Moore's Law is the prediction that the number of transistors in an IC doubles every year. This plays into the idea that you must upgrade your hardware every two years or you'll be behind and creates the illusion that innovation and development is endless.
This miniaturization of components did not result in more efficient technology use. On the contrary, Jevons Paradox shows that increased efficiency in the production process would lead to even more resource consumption [@remyLimitsSustainableInteraction2015] [@gabrysDigitalRubbishNatural2011] [@parksFallingApartElectronics2007].

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@ -18,5 +18,3 @@ Surprisingly, it turned out to be pretty simple to open, as there were only 8 sc
The PCB has SMD components. Taking these off went much faster than expected, but I'm afraid I've melted a bunch in the process. (And lost a few in transportation).
On the back side of the PCB, there are some regular-sized components. I wonder why this was done this way.
<ins>Radios are known for their bendability (Homemade electronics book)</ins>

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@ -10,5 +10,3 @@ description: This is the description of the about us page
Dear reader,
This web page includes the WIP version of my thesis. For (limited) information about Klankschool's repair café, go to [https://unrepair.klank.school](https://unrepair.klank.school). The text you'll find below is a draft of the thesis. This thesis will be a field guide to salvaging electronics to make sound devices. This field guide is compact and is meant to be taken *"into the wild."* You can download the guide as a PDF via [this link](https://unrepair.vitrinekast.xyz/assets/thesis.pdf), or CTRL + P your own.
I'm leaving notes of things I'd like to include later. These notes can be recognized by their <ins>tags</ins>.

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@ -1,17 +0,0 @@
---
title: Kick
BOMTable: true
order: 3
show:
shortDescription:
"A keyboard to play your oscillator"
BOM:
- type: Misc
label: "A completely clean PCB"
- type: Resistor
label: "Multiple resistors between 1K and 100K"
pcb: "./recipes/Kick/PaperCircuit.png"
---
<ins>rewrite this to the motor synth</ins>
<ins>Talk about which components are replacable, how to circuit bend your own circuits</ins>

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@ -10,16 +10,15 @@ BOM:
label: "A completely clean PCB"
- type: Resistor
label: "Multiple resistors between 1K and 100K"
pcb: "./recipes/PCB-keyboard/sketch.png"
pcb: "./recipes/PCB-keyboard/sketchpic.webp"
---
This recipe uses the SingleTransistorOsc created in a previous recipe. The keyboard will replace the resistor of the SingleTransistorOsc that is in charge of the pitch. That pitch resistor will now be on the keyboard.
This recipe uses the Single Transistor Oscillator created in a previous recipe. The keyboard will replace the resistor of the oscillator that is in charge of the pitch. That pitch resistor will now exist on the keyboard.
<img src="./recipes/PCB-keyboard/keyboard.webp" height="150px" />
From a PCB that you have salvaged, remove _all_ of the components and, with a piece of sandpaper, scratch off the green mask of the PCB, making the copper visible. Now, the traces of the PCB can be reused as wires. We will place multiple resistors on the PCB, to create the following circuit:
From a PCB that you have salvaged, remove _all_ of the components and, with a piece of sandpaper, scratch off the green mask of the PCB, making the copper visible. This causes the traces on the PCB to become conductive.
Find or make a bunch of tracks or traces that are not connected to each other (using the multimeter). These will act as your wires! To one trace, solder the audio in from the SingleTransistorOsc. Find a trace nearby, close enough that if you can touch the two traces with your thumb, and solder a resistor on that trace. The other end of the resistor should go back to your SingleTransistorOsc.
![Since this power supply will be used a lot, I made it a bit more permanent by glueing it to a piece of wood.](./recipes/PCB-keyboard/schematic.webp)
Now, when you touch both traces with your finger, a bridge is created, closing the circuit, and causing the audio signal to go through your resistor back into the original circuit. If you do this multiple times with various resistor values, you've create a playable keyboard!
Find or make a couple of tracks or traces that are not connected to each other (using the multimeter). These will act as your wires! To one trace, solder the audio in from the oscillator. Find a trace nearby, close enough that if you can touch the two traces with your thumb and solder a resistor on that trace. The other end of the resistor should go back to your oscillator.
<ins>illustartie vervangen met een getekende kicad ding</ins>
Now, when you touch both traces with your finger, a bridge is created, closing the circuit, and causing the audio signal to go through your resistor back into the original circuit. If you do this multiple times with various resistor values, you've created a playable keyboard!

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@ -45,17 +45,15 @@ This *super simple oscillator circuit*[^easy] makes use of something called a "r
[^reddit]: This is why Reddit has advised against building this oscillator. But this is the only sound generating schematic that has worked so far and doesn't use chips.
<ins>reddit er evt. uithalen</ins>
### Powering
Select the amount of voltage you need based on the transistor[^datasheet] you have. Mine needed 18V, so using alligator clips, I've connected our previously built power supply.
[^datasheet]: Find a datasheet online to discover your transistors' voltage limits before plugging in the circuit
### Testing & Troubleshooting
After double-checking all your connections, hook the audio out to an amplified speaker (like a small JBL). No sound? Here are things to try:
<ins>dit moet een list zijn</ins>
- Triple check your connections and the orientation of the capacitor.
After double-checking all your connections, hook the audio out to an amplified speaker. No sound? Try:
- Check your connections and orientation of the capacitor.
- Play around with the potentiometer[^potmeter].
- using a multimeter, follow the entire audio trace from the transistor up until your audio cable.
- Try a different transistor
@ -66,5 +64,3 @@ After double-checking all your connections, hook the audio out to an amplified s
If you, like me, have struggled a lot to get any sound whatsoever, I can hopefully tell you that **this is where things will get fun(ky)**. Getting a single sound out of anything is such a eureka moment [^clicks]. Because from here, you'll be able to play around with the circuit and use our own imagination. For instance, using a different sized resistor to change the pitch. Or, using a Light Dependant Resistor to control the pitch based on the sound. Or adding a on/off button. Or, building your own keyboard using multiple resistors...
[^clicks]: Making and playing this circuit helped me a lot with understanding how electricity flows and how you can manipulate the flow.
<ins>Talk about which components are replacable, how to circuit bend your own circuits</ins>

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@ -31,7 +31,7 @@ You could skip the capacitors and resistors and just connect the batteries toget
[^18V]: You can also get 18V: treat the -9V pin as 0V, making the 9V pin 18V
![Since this power supply will be used a lot, I made it a bit more permanent by glueing it to a piece of wood.](./recipes/power-supply/photo.jpeg){ max-height=130px }
![Since this power supply will be used a lot, I made it a bit more permanent by glueing it to a piece of wood.](./recipes/power-supply/powersupply.webp)
[^smooth]: ![The capacitor can filter electrical spikes for a more smooth voltage input](./recipes/power-supply/filtering.png){ height=30px }

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@ -0,0 +1,42 @@
---
title: "Components"
type: Chapter
slug: true
nested: "components"
front: true
---
Once youve broken your device down into its individual puzzle pieces, we can zoom in on them more closely. Is there anything that immediatly sparks your interest? Did you already uncover unexpected materials? Chances are you uncovered one or more Printed Circuit Boards (PCBs), and—very generally speaking—some kind of input and output components, all connected by several types of wire[^wires]. For example, inside a digital picture frame I found a power input, a battery, a screen, speakers, a two-sided PCB, and an antenna.
PCBs are populated with either “through hole" (THT) or "surface mount" (SMD) components. SMD components are very small and soldered directly onto the board's surface. Their size makes labels hard to read, and theyre designed for automated assembly, making them impractical for salvage[^tried]. Thats why I rarely salvage from computer-type devices. These usually contain nothing but SMD components and lack interesting interactions or mechanical parts.
[^tried]: The biggest issue is the size of the legs, which are impossible to solder without making your own PCB's. Ive made prototypes with cutting the entire PCB, using conductive ink, copper tape and charcoal pens. None of the strategies worked well
[^wires]: Great for reuse as well!
## Desoldering
Desoldering components is generally more difficult than soldering and requires patience and practice. Ironically, desoldering guns are much more expensive than soldering irons, so heres how I do it, without one.
In a well-ventilated[^well-ventilated] room, heat up the blob of solder that connects the component to the PCB using a soldering iron. After a couple of seconds, youll notice the solder becomes liquid[^liquid]. Then, using tweezers or a plier, I carefully pull the leg out from the backside of the board, and then do the same for the other legs. This process can take somewhere between 10 seconds and 10 minutes and can be both frustrating and meditative.
[^liquid]: How fast this happens depends on the temperature of the soldering iron and the melting point of the solder that is on the board. If it wont melt, adding a bit of your own solder helps.
[^well-ventilated]: whilst modern devices cannot contain lead anymore, older solder will. Do not lick the PCB, clean your hands after and open a window.
## Common components
In the next few pages, Ill briefly address some of the more common components. If you want to know more about what each component specifically does, I recommend *Getting started in electronics* [@mimsGettingStartedElectronics1983].
Many components, like transistors and chips, have datasheets available online. You can usually find them by entering the part number, often printed directly on the component[^unless], into a search engine. While datasheets can be overwhelming and full of technical jargon, they typically show a pinout, explaining what each leg does, and a description of the component's behavior.
In the next chapter, well get into making with the salvaged components. The recipes need some specific components, which are highlighted below. It's always wise to have some extra! Components might break, speaking from experience, having to stop because you've run out of working components, is very discouraging.
[^unless]: Since the manufacturer didnt think you ever needed to know which oddly specific chip youre looking at, they sometimes deliberately scratched it off.
::: {.table-wide}
## Overview of common components
:::
<ins>in dit hoofdstuk benoemen dat je extra zooi nodig hebt voor het geval je iet sopblaast</ins>

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@ -105,7 +105,11 @@
} else {
e.parentNode.removeChild(e);
}
})}
})
}
content.querySelectorAll("#footnotes, #refs").forEach((f) => {
f.parentNode.removeChild(f);
})
}
}
Paged.registerHandlers(MyHandler);
@ -119,7 +123,6 @@ window.addEventListener('beforeunload', () => {
window.addEventListener('load', () => {
});
</script>
{% block title %}
{%- if page['title'] -%}
@ -152,8 +155,7 @@ window.addEventListener('load', () => {
<p>{{ render_list('repair-logs', 'Repair Logs') }}</p>
<p>{{ render_list('events', 'Events') }}</p>
{% block footer %}
<p>Find the code on Klankservers <a target="_blank"
href="https://code.klank.school/vitrinekast/klank-docs">Git!</a>.</p>
<p>Find the code on Klankservers <a target="_blank" href="https://code.klank.school/vitrinekast/klank-docs">Git!</a>.</p>
{% endblock %}
</aside>
{% endblock %}

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@ -11,7 +11,7 @@
{% else %}
{{ thing['count'] }}
{{ thing['value'] }}
<a href="/components/{{ thing['type'] |slugify }}.html">{{thing['type']}}</a>
{{ thing['type'] }}
{% endif %}
{% if thing['alternative'] %}

View File

@ -9,13 +9,16 @@
{% for image in content['images'] %}
<figure class="" index="{{loop.index0}}">
<img src="{{ image['src'] }}" alt="{{image['alt']}}" />
{% if image['alt'] %}
<figcaption>{{image['alt']}}</figcaption>
{% endif %}
</figure>
{% endfor %}
</header>
{%endif%}
<article>
<article class="{% if content['shortDescription'] %}fix-break-left{% else %}fix-break{% endif %} ">
<section class="meta">
{% if isNested %}
@ -27,10 +30,6 @@
<header>
{% if content['folder'] is defined %}
<h3>{{content['folder']}}</h3>
{% endif %}
<h1>{{content['title']}}</h1>
{% if content['alsoKnownAs'] %}

View File

@ -17,7 +17,7 @@
<header>
<h2>A field guide to</h2>
<h1>Salvaging Sound Devices</h1>
<h3>Version {{documents['meta']['version']}} | generated on {{documents["meta"]["now"]}} </h3>
<h3>{{documents["meta"]["now"]}} </h3>
<h5>Rosa Schuurmans</h5>