While you may not be familiar with the term “busy board”, you’ve almost certainly seen one. It’s the sort of toy with a bunch of buttons, switches, and of course LEDs, that …

Seedmate is an air-gapped, stateless BIP39 calculator that lets you generate, verify, and split wallet seed phrases completely offline.

Packed with onboard intelligence, this tiny 1/48 scale locomotive runs on supercapacitor power and operates on its own.

CNC Shield V4 - Laser Engraver: This CNC laser engraver is truly the cheapest that you can make while maintaining a decent level of accuracy....cheaper than this- means you stole it! To achieve this l...

YouTube video by Sebastian Lague

An Arduino controls the lathe's DC motor, counts the number of spindle turns —in either direction— to stop the rotation with precision. By daniel23.

If you’re a retro Nintendo fan you can of course carry a NES and a Game Boy around with you, but the former isn’t very portable. Never fear though, because here’s [Chad Burrow], w…

KB Sriram recreated a 1982 hardware number sieve with microcontrollers, showing how physical filters crushed math problems long before code.

Micro-8 is a new retro-inspired 8-bit home computer with custom graphics, sound, and a built-in programming language.

This digi-pot is 100 kΩ (±20%), 8-bit/257 step, Dual-Circuit. 2.7-5.5v operating voltage, with excellent documentation, plug & play. MCP4661

YouTube video by Playful Technology

Everyone of us just loves PCB business cards with a gimmick (throwback to the 2024 contest). But Lets be honest. They are either expensive, hard to build and/or impractical. And giving away a PCB with...

AVR-Laptop squeezes multitasking, apps, games, and video playback into a homemade PC powered by an 8-bit ATmega2560 with just 8 KB of RAM.

Nick Electronics built a giant, 3D-printed ATmega chip that doubles as a fully functional wireless phone charger.

YouTube video by HTX Studio

Dumpster Fire SAO Very Limited Edition This limited-edition SAO is a hand-assembled, 3D-printed dumpster fire, complete with multiple fire-intensity modes so you can choose exactly how badly everythi…

Watching space rocks obscure stars is easier than you think

Same PIC IR receiver project 18 years apart. In 2007 it took weeks; in 2026 an AI rebuilt it in one afternoon. By Jorge.

Open-source ATtiny13A-based digital dice. Hardware v2.1, firmware v1.1.0, MIT licensed.

YouTube video by DAZ projects

YouTube video by Mark Rober

For his own reasons, [Jose Luis Monteiro] (aka [emsyscode]) decided he needed to drive the LCD on a Sony CDX-A250 car stereo’s front panel using an Arduino. There’s probably a sweet pro…

YouTube video by diorama111

Have you ever been annoyed with overly complicated bike lights? This project is for you! By Mike Kushnerik.

International Launch Offer • Handmade granular synthesizer with touch, light & CV control. Free worldwide shipping.

YouTube video by Microchip Technology, Inc.

Don't make the same mistakes I did.

Yes, there's a video at the end of the article.

From the 1920s to the late 1990s, the fastest way to compute certain answers in number theory was not a general purpose computer, but a special device called a number sieve. The Lehmer family (a fathe...

DCF77 is a German VLF transmitting station that broadcasts a time signal across Europe on 77.5 kHz. Thus a common sight in a European home is a clock emblazoned with the words “Radio controll…

Build a compact environmental data logger using the ATmega328P-AUR microcontroller. The project measures temperature, humidity, and ambient By Robert Fletcher.

The new $29 Arduboy Jr comes equipped with nearly everything you need to make your dream retro handheld.

YouTube video by EngineeringChaos

For as capable as smartphone hardware is, the software running on them can be especially restrictive and cumbersome. Unlike a single-board computer with GPIO running a standard Linux operating syst…

YouTube video by Adafruit Industries

ATtiny84 Motion-Activated Acrylic LED Plate: I built this as a small battery-powered motion indicator for my dog's food/water station. The original idea was to create an underglow beneath a wooden pla...

My personal website where I showcase my latest work. Check my projects out and get in touch if you have questions or suggestions.

YouTube video by ALTco

YouTube video by Microchip Developer Help

A simple Back to the Future inspired Flux Capacitor LED effect built around a PIC12F683 microcontroller.