Component Abuse Challenge | Hackaday.io

98 projects

The GeigerWatch uses laser modified BPW34 to detect α, β, γ radiation

GeigerWatch, a Sensitiv Radiation Detector Watch

LCD 16×2 controller built from 8 multiplexers — no microcontroller, no code, just pure logic.

μMUX Brain – An LCD Without a Micro

jesus-angel-martinez-mendoza Jesus Angel Martinez Mendoza

Medic Mini is a handheld ESP32-C6 device that checks symptoms using simple button inputs.

MEDIC Mini

arnov-sharma Arnov Sharma

* No magic here. But I show that LEDs light up from tiny currents induced by electric fields around us, with no further electronics needed.

LEDs light up without power or electronics!*

joekutz joekutz

A single stage high gain amplifier with optically coupled stabilization circuit.

High gain amplifier with LDR

marco-m Marco M

Overclocking a 555 in astable oscillator configuration

Ludicrous 555

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

SoulCage - the Digital Trapped Soul Pendant

vishal-soni vishal soni

This circuit is not new but is rarely used or talked about. So here is a linear VR using BJTs only

BJT AS A ZENER

taurai-mirimi Taurai Mirimi

An alternating flasher that runs out slowly, controlled by the dielectric absorption of capacitors.

The run-out flasher

bkainka b.kainka

How to capture Gameboy Advance display signals using a 1.5 USD general purpose MCU and output it via USB Video Class (UVC)

Gameboy Advance 2 USB (GBA2USB)

(aka Variable Choke as Speaker Tone Control.)

Using a Transformer as a Variable Choke

Using the classic single transistor negative resistance relaxation oscillator to flash colour changing LEDs

A Backwards Way to Flash Colour Changing LEDs

If you have a 3D printer, you can create your own painted on decals, by borrowing methods from nail art

Custom decals using nail art supplies

tamas-feher Tamas Feher

An average Room AQI Monitor with a Classic Twist

Room Air Quality Monitor

arnov-sharma Arnov Sharma

4 bit adder made using AND, OR, XOR gates which were made with Photoresistors and LEDs.

Adding numbers using photoresistors and led

MOSFET CAPACITANCE AS A COMPONENT

USING A MOSFET AS A CAPACITOR

taurai-mirimi Taurai Mirimi

3 XOR gates of the troubled CD4030A serve as a VCO with wide frequency range and noisy, intermittent, chaotic behavior at low frequencies.

Abused XOR Periodic and Chaotic Oscillator

adrian-freed Adrian Freed

When you are given several PC817 optocouplers, you naturally start thinking about what you could build with them. A simple flasher!

The Opto Flasher

bkainka b.kainka

Made an XL version of the beloved WS2812B addressable LED that works like its original counterpart!

Neopixel Giant Edition

arnov-sharma Arnov Sharma

This project simulates a double pendulum, a simple system with complex dynamics and high sensitivity to initial conditions.

Interactive Double Pendulum Playground

abhishek-choudhary Abhishek Choudhary

For this Halloween, I'm fusing the creative blocky world of Minecraft with the spooky glow of the colorful RGB LEDs in a fun & simple projec

A Color Adjustable Minecraft Lantern

An inductor is used to receive power from a Qi wireless charging base station and power a microcontroller and 10 LEDs

Inductors are Wireless Power Sources

bornach bornach

The circuit is very simple: an ultra-bright green LED, two 10-ΜΩ resistors, two 100-nF ceramic capacitors and a push-button switch. When you

A Self-Charging LED Flasher By Burkhard Kainka

Made an RGB USB Drive that is modeled after Ryomen Sukuna, completely from PCBs.

Thumb Drive- Ryomen Sukuna Edition

arnov-sharma Arnov Sharma