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97 projects
306
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Discrete optocouplers using metal can transistors and 5mm LEDs (and a saw)
Project Owner Contributor

Discrete optocouplers

stephenStephen

1.7k
6
3
Using standard 4000 series ICs to build ternary circuits
Project Owner Contributor

Ternary abuse of CMOS logic

shaosSHAOS

4.1k
9
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Overclocking a 555 in astable oscillator configuration
Project Owner Contributor

Ludicrous 555

magicwolfiMagicWolfi

488
5
3
Can be a cheap webcam used as a decent thermal imagery? What we need? cryogenic temperatures? averaging neighbor pixels or long exposures?
Project Owner Contributor

Webcam as thermal imaging

fvfilippettifvfilippetti

2.2k
10
12
(aka Variable Choke as Speaker Tone Control.)
Project Owner Contributor

Using a Transformer as a Variable Choke

kensKenS

412
2
2
This is a Digital sprit level tool is an instrument designed to indicate whether a surface is horizontal.
Project Owner Contributor

Planum - a Digital Spirit Level Tool

vishal-sonivishal soni

311
3
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Why not add a "retro" sound or two to your badge?
Project Owner Contributor

Floppy Clicker SAO

dmitry-pustovitDmitry Pustovit

1.4k
6
6
Using resistors as heat sources to reflow solder is a lightweight electrical+mechanical connection for modular robots, with no problems
Project Owner Contributor

Low melt solder connected robots

mianamiana

656
2
2
Output stage abuses a moving-coil loudspeaker as a flyback inductor and 74HC logic as a high voltage clamp.
Project Owner Contributor

Simple Geiger-Müller Tube Interface

jamesJames

3.5k
2
1
When you are given several PC817 optocouplers, you naturally start thinking about what you could build with them. A simple flasher!
Project Owner Contributor

The Opto Flasher

bkainkab.kainka

1.6k
4
8
What happens when you replace the resistor and capacitor of an RC sawtooth oscillator with a reverse biased LED?
Project Owner Contributor

Cadmium-free Light Sensitive Sawtooth Oscillator

bornachbornach

5.8k
25
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running Windows 9x/NT on MCU such as ESP32-S3
Project Owner Contributor

tiny386

hchunhuihchunhui

3k
5
7
Using the base-emitter junction of an NPN BJT transistor instead of an NTC thermistor.
Project Owner Contributor

A transistor instead of a thermosensor? Sure!

aleksei-tertychnyiAleksei Tertychnyi

2.2k
5
8
Bending IC's to measure weight - Component Abuse Challenge 2025
Project Owner Contributor

OP-AMP Weight Scale

trashtronictrashtronic

383
0
0
an esp32 based device for measuring/reading entropy levels and detecting anomalous readings.
Project Owner Contributor

ESP32: RESONANT_ENTROPY

voidrane-splicervoidrane Splicer

2.8k
10
18
If you have a 3D printer, you can create your own painted on decals, by borrowing methods from nail art
Project Owner Contributor

Custom decals using nail art supplies

tamas-feherTamas Feher

2.5k
18
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Measurement of wind speed and direction through two load cells.
Project Owner Contributor

Load Cell Wind Anenometer

blanchard-jordanBLANCHARD Jordan

632
4
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An alternating flasher that runs out slowly, controlled by the dielectric absorption of capacitors.
Project Owner Contributor

The run-out flasher

bkainkab.kainka

758
2
2
Surprisingly good 1 bit PCM audio at an absurdly low samplerate. 1 Bit audio not at millions, but as little as 15,926 samples a second!
Project Owner Contributor

Abusing a 6522 VIA serial port for PCM Audio

normall-userNormalL User

1.5k
15
21
In this, the soul is moving and try to break the mirror to get out from pendent. There are two souls, male and female, which can be switched
Project Owner Contributor

SoulCage - the Digital Trapped Soul Pendant

vishal-sonivishal soni

3.1k
6
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Hexaphonic guitar puckup built from 6 unmodified relays and amplifiers
Project Owner Contributor

Relay as a magnetic guitar pickup

kauzKauz

669
1
1
PiBoy Advance is a modified GBA shell that is retrofitted with a custom PICO 1-based circuit.
Project Owner Contributor

PiBoy Advance

arnov-sharmaArnov Sharma

1.2k
337
3
This re-implementation of the pioneering circuit-bending crackle box instrument uses a Soviet-Era power Op-amp in an unusual package
Project Owner Contributor

Power Crackle Music by abusing an Unusual Op-amp

adrian-freedAdrian Freed

295
2
1
Making a solar powered LED light blink when it sees it's own light
Project Owner Contributor

Solar Light Sees Itself

hdickermanhdickerman

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