How many bird calls can you recognize by ear? 🐦🎶 Hannah Robertson's Birduino is an ATmega328-driven audio player that provides a fun and interactive way to learn the vocalizations of various species, simply by tapping an NFC card on a reader: hannahilea.com/blog/birduino

UC Santa Cruz electrical engineering student Ceferino Sacramento developed a PIC32-powered autonomous navigation and targeting robot that combines event-driven HSM firmware, custom sensing electronics, encoder-corrected differential drive, and a dual-flywheel launcher: github.com/cksacram/aut...

Tired of adjusting the brightness of his nightlight every evening, Oscar Molnar decided to automate the process by designing a custom PCB around an ATtiny85 — making bedtime just a little bit smarter.

I Designed A Custom PCB To Avoid Pressing A Button Three Times

My night light always booted up too bright, so I designed a PCB that presses its button for me.

blog.tymscar.com

Diorama111 converted a 1:150-scale Toyota ProBox into an ATtiny1616-equipped, remote-controlled mini vehicle — featuring dual motors for steering and driving, along with functional lights.

1/150 scale TOYOTA ProBox Micro Remote Control Car

YouTube video by diorama111

youtu.be

Parents, here's a project for you! This DIY music player lets children select their favorite songs simply by placing an RFID-tagged toy on top. Built around an Arduino Nano, the device plays MP3 playlists from an SD card through a simple, kid-friendly interface — no screens required.

Child-Friendly Music Player Uses RFID

[David] has a young child who is clever enough to use a computer to play music, but he doesn’t quite want to hand over the mouse just yet. Thus, he set about building an electronic music play…

hackaday.com

Meridian Electronics' module breaks out an MCP4725A0T 12-bit DAC, providing pin headers for power, ground, output, and I2C communications.

12 Bit DAC (MCP4725) Module by Meridian Electronics on Tindie

This module breaks out a MCP4725A0T, providing pin headers for power, ground, output and I2C communications. 12 bit, runs on 3.3v & 5v.

tindie.com

Mirko Pavleski demonstrates a simple direct conversion SDR receiver based on an MCP2036 analog front end device.

Simple MCP2036 SDR Radio - The Most Unusual SDR

In this project I demonstrate an extremely simple Direct Conversion SDR Receiver based on the Microchip MCP2036 IC. By Mirko Pavleski.

hackster.io

UncleStem gave his 7:1-scale Arduino UNO a matching giant 16×2 LCD display — and it's even compatible with the LiquidCrystal_I2C library.

I Built a 7 Times Bigger Arduino LCD Display (And It Actually Works!)

YouTube video by UncleStem

youtu.be

Oliver Paff constructed a pair of ATmega2560-controlled robotic legs as the first step toward building a humanoid robot.

I Built Humanoid Robot Legs

YouTube video by Oliver Paff

youtu.be

How much has embedded development changed over the last 20 years? Jorge Mullor recreated a PIC®-based infrared receiver originally built in 2007 — this time using a PIC32CM PL10 Curiosity Nano and an AI-assisted workflow.

2007 vs 2026: A PIC IR Receiver, Built with AI

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

hackster.io

Zeyad S. designed a fully custom ATmega328PB board to serve as a compact, flexible development platform for prototyping embedded projects: www.linkedin.com/feed/update/...

Time for another #TBT project! ⌚️ Back in 2017, IngeP designed an ATtiny84A-powered breadboard wristwatch that showed hours and minutes on a QDSP-6064 bubble LED display.

Bread Board Wristwatch

ingep.net

I made a bunch of traffic barrels with reflective stripes and battery-powered, blinking warning lights. No, I did not use a 555. Read my blog post to see why I preferred using a @microchip-makes.bsky.social PIC12F1612 8-pin micro to blink the lights: bikerglen.com/blog/army-of...

Will van den Bogert (AKA the. Amazing, PhD) developed his own custom, low-cost force-sensitive resistors to replace expensive off-the-shelf versions for his wearable tech projects.

Don't Tell Big Sensor I Built This

YouTube video by the. Amazing, PhD

youtu.be

@ncstate.bsky.social researchers have developed a wearable patch that can detect hazards in the environment and then notify wearers via haptic feedback.

Wearable Patch Vibrates When It Detects Environmental Hazards

A wearable patch can detect environmental hazards and notify wearers by vibrating against their skin.

news.ncsu.edu

The Seasides Roulette Badge is an interactive, ATtiny85-based CTF board designed to teach soldering, embedded security, and basic hardware hacking in a fun and engaging way.

Seasides Goa 2026 Roulette Badge - BadgeLife by C1PH3R-FSOCITEY on Tindie

Official Seasides 2026 Hardware CTF Badge. Build, solder, hack, and explore embedded security with this open-source ATtiny85 kit.

tindie.com

The Seasides Roulette Badge is an interactive, ATtiny85-based CTF board designed to teach soldering, embedded security, and basic hardware hacking in a fun and engaging way.

Seasides Goa 2026 Roulette Badge - BadgeLife by C1PH3R-FSOCITEY on Tindie

Official Seasides 2026 Hardware CTF Badge. Build, solder, hack, and explore embedded security with this open-source ATtiny85 kit.

tindie.com

Never struggle with limited I/O pins again! DIY GUY Chris designed an MCP23017-equipped, 16-channel industrial GPIO expander on a DIN-rail mountable PCB for real-world automation projects.

Industrial GPIO Expander – MCP23017

Industrial 16-channel GPIO expander with MCP23017. DIN-rail mountable, optoisolated, addressable via I²C. By DIY GUY Chris.

hackster.io

András Vujovits crafted a custom, ATmega328-controlled delta pen plotter from scratch — complete with a useful auto tool changer.

Delta Pen Plotter Draws In Multiple Colors

If you’re building your first plotter, or you just like thinking in right angles, you’d probably consider a Cartesian design for your build. [András Vujovits] went another route with hi…

hackaday.com

Explore the computer byte with the PIC16F670-controlled 8-bit Workbench ED Kit. Toggle in eight bits and see their decimal, hex, or octal value!

Group pre-order: Pre-order: 8-bit Workbench™ ED Kit

Explore the computer byte with this educational easy-to-solder kit. Toggle in 8 bits and see their decimal, hex or octal value. With game!

lectronz.com

BirdCalls, an Arduino-powered project by David Schulman, turns old payphones into interactive installations that play the sounds of local birds instead of a dial tone.

BirdCalls: how an old payphone became a decade-long lesson in what technology is for | Arduino Blog

There’s a yellow payphone bolted to a wall in Takoma Park, Maryland. Pick up the handset, press a number, and instead of a dial tone you hear a night heron, a red-tailed hawk, a wood thrush. No spare ...

blog.arduino.cc

Peeling back the years this #ThrowbackThursday...🍌 Calum Knott's WTFDuino was a banana-shaped, ATmega328-based board intentionally designed to be incredibly confusing to use: youtu.be/KAL0XMIszVk

Xabier Rosas' Quecet is an Open Source Hardware Association-certified, ATmega328-based intelligent 230VAC soldering/desoldering hot plate controller — designed for personal, educational, and experimental use: github.com/xdesig/Plac_...

Grunwalskii is designing a compact, breadboard-friendly ATtiny1616 development board that features an onboard auto UPDI / serial switching circuit: github.com/Grunwalskii/...

A.C. Wright Design's KEY2USB is an ATmega328-controlled expansion port cartridge kit that turns your real Commodore 64 keyboard and joysticks into a USB HID keyboard for a PC running the VICE emulator.

KEY2USB — Commodore 64 Keyboard to USB Kit by A.C. Wright Design on Tindie

Expansion port cartridge kit that turns your real C64 keyboard and joysticks into a USB HID keyboard for VICE. No mods, no soldering inside.

tindie.com

With little trust in off-the-shelf USB passkeys, MyVanitar decided to design a custom hardware security device around an ATtiny85.

DIY Safe USB Passkey

YouTube video by MyVanitar

youtu.be

David Johnson-Davies' IR NeoPixel Controller is an AVR16DD20-based NeoPixel driver that fits on a small USB-C dongle — and lets you control LEDs via an IR remote: www.technoblogy.com/show?5O8R

Igor Brichkov constructed an impressive 16- or 64-step sequence drum machine, which integrates force-sensitive piezo-triggered drum pads and six voices. The "brain" of the unit utilizes an AT28C256 EEPROM that enables users to save and recall patterns.

A Feature-Rich Drum Machine

A little over a month ago, we featured a project from [Igor] who built 64 bits of DRAM from scratch using discrete components. Jokes about memory pricing aside, he did have a use case for such a sm…

hackaday.com

After struggling with jerky low-speed control from inexpensive BLDC motor controllers, Tony Goacher created an ATmega328-based solution.

Hack Improves Cheap Speed Controllers

[Tony Goacher] has worked with a lot of cheap brushless DC motor controllers built in China. They can be very cost-effective, but sometimes limited in performance or capability, particularly when i…

hackaday.com

Abhinav SP designed a Matrix-raining, acrylic-stacked, CTF-unlocking badge for Bug Bounty Village — all controlled by an ATmega16A at its core.

Bug Bounty Village 2025 Badge

A Matrix-raining, acrylic-stacked, CTF-unlocking badge built for Bug Bounty Village - and the six-layer PCB saga behind getting it to glow. By Abhinav SP.

hackster.io