Component Abuse Challenge | Hackaday.io

98 projects

What happens when you replace the resistor and capacitor of an RC sawtooth oscillator with a reverse biased LED?

Cadmium-free Light Sensitive Sawtooth Oscillator

bornach bornach

OrbitClock blends futuristic design with IoT tech. It shows real-time NTP time and environmental data in a sleek satellite-style form.

OrbitClock – a Tiny Space IoT Environmental Clock

next-builder Next Builder

By wiring simple electrical components like relay, neon bulb and a 9V battery, back emf from the relay can be used to light the bulb.

Glow a neon bulb using 9V DC battery and a relay!

Trying to generate many musical tones from a single atmega at the same time.

One chip square wave harp

Data transmission using an LED as a photodiode

Better Than Bluetooth

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

Neopixel Giant Edition

arnov-sharma Arnov Sharma

Some home computers used to have RF video output. The P2 could bring that back with ATSC HDTV output.

Digital TV signal from Parallax P2 microcontroller

real-solar-cars Real Solar Cars

Most of us have already seen the gas detection system that is found in the ceiling of the office! Well this works in the similar way!

Arduino Gas Leakage and Flame Detection With Alert

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

I needed a circuit and I did it. ?

12V battery charger

Jade is not just another DOOM engine, because right now, JADE doesn't even play DOOM. But maybe someday, it will on an FPGA or "NOR machine"

JADE: Not Just Another DOOM Engine

Design and build of a low capacitance isolated gate driver supply for SiC FETs.

Isolated Gate driver supply

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

A Backwards Way to Flash Colour Changing LEDs

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

Thumb Drive- Ryomen Sukuna Edition

arnov-sharma Arnov Sharma

Melting plastic into your projects with 3d printed conductive PLA fuses.

3D Printed Electrical Fuses

johnsonfarmsus JohnsonFarms.us

I have built a circuit with two PTC fuses rated for 100 mA plus two 6V/100mA incandescent bulbs and two push-button switches.

The PTC flip-flop

bkainka b.kainka

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

Keep your resin at the right temperature with this USB-PD powered vat heater featuring ESP32 control, dual channels, and fan support.

Vat Heater for Resin 3D Printers

dimitar Dimitar

Use your microcontroller internal IO pull-ups as base resistors and use input-only pins as outputs

Pull-up hacking

scart-vader SCART VADER

Self balancing robot software part is that you can build your own own at home using this

Making Self Balancing Robot Software Part

next-builder Next Builder

A proof of concept which demonstrates how analog op amps can perform digital logic functions.

OP-Amps Gone Digital - A BCD to 7 Seg Converter

An average Room AQI Monitor with a Classic Twist

Room Air Quality Monitor

arnov-sharma Arnov Sharma

Bending IC's to measure weight - Component Abuse Challenge 2025

OP-AMP Weight Scale

Compact USB PD-powered Reflow soldering table with BLE control via browser.

USB PD Reflow micro table