DiscoLapy built an ATmega328-controlled, four-channel temperature logger that stores data on an SD card and displays readings on a pair of LCDs.

After the Artemis II launch, have you wondered how many people are now in space? Display the current number and names of the astronauts on the SAM D51-based Adafruit PyPortal!

Masahiro Furukawa's ADX-1616 is an ATtiny1616-equipped, Arduino-compatible board designed for automation and industrial applications.

This ATtiny85-based timer circuit is an eggsellent way to learn how to solder.

Tony Goacher built an electric tracked tricycle, called the TrakTrike, to zip around EMF Camp in style.

Ensure the safety of your flock with Vinnie Moscaritolo's ATmega1284P-controlled automated chicken coop door system.

This smart conveyor belt system uses a SAM D21-based Arduino MKR WiFi 1010 for wireless remote control and intelligent status updates.

Mark Wilson converted a broken Trimble AgGPS 332 GPS receiver into an ATmega32U4-controlled clock.

Tobias Tech's ATmega2560-driven can solve a Rubik's cube in seconds.

David Montero Crespo's Velxio project is an open source Arduino emulator with programmable logic and local execution.

Mirza Naiem Beg's ATmega328-controlled setup turns your Venetian blinds into an automated system that opens and closes at scheduled times.

SciFientist made an ATmega328-powered, 3D-printable desktop micro mill that features joystick control

Mirko Pavleski's ATmega328-powered DIY VFO provides a sine wave alternative to square wave oscillators, complete with a retro-style control center.

Now with 100+ chickens, Vinnie Moscaritolo decided to build an ATmega1284P-controlled automatic coop door that calculates sunrise/sunset on its own and opens/closes on schedule with a gravity-actuated vertical door and locking mechanism to keep predators out.

GurgleApps' Automatic Ovoid Scrivener is a Victorian-style egg plotter with a web interface for custom designs.

Play a game of catch with Richard Huberjohn's ATmega328-controlled, distance-sensing robot.

In honor of yesterday's Artemis II launch, our latest #TBT remembers a much smaller and *slightly less powerful* flight computer than the brains of NASA's Space Launch System. Back in 2021, BPS.space designed a fingertip-sized avionics system for model rockets — called Spark — based on a SAM D21.

This reference application demonstrates a smart car built on Microchip's PIC32CZ CA90 Curiosity Ultra Development Board. The vehicle can be operated manually via an RC receiver or can navigate autonomously using data from a LiDAR sensor, which enables real-time obstacle detection and path planning.

James Bruton's ATmega328-controlled, six-servo robot dog is a simpler and more accessible design that everyone can build: youtu.be/2eKb_2N0SBI

PajoPCB designed an ATtiny85-based roulette PCB that uses 32 LEDs to simulate spins.

MakerVan Labs' Synthiboard is an ATmega328-based synthesizer development board capable of running a number of different synth firmwares.

Aaron Vose's ATtiny412-SR is a custom ATtiny412 dev board that plugs right into a breadboard for simplified project prototyping: www.reddit.com/r/PCB/commen...

Prashant Sinha's Limn is ATmega1284P-controlled pen plotter equipped with an automatic tool changer.

Need a hand with the laundry? Carter Morrow's ATmega328-controlled automated machine will fold your clothes like a retail pro.

David Johnson-Davies highlights a pair of alternative graphics libraries that support a range of different color TFT displays, and combine fast performance with minimal memory usage on ATtiny MCUs: www.technoblogy.com/show?5N9Y

Did you miss yesterday's Arduino Days 2026 livestream? The Wizard of Make Bob Martin joined Arduino co-founder and longtime friend Massimo Banzi for a conversation around the current state of IoT, designing CRA-compliant devices, and more. Watch it now: www.youtube.com/live/qqfmK3q...

Elias55745's ATmega328-powered mini laser engraver is capable of burning highly detailed designs into wood, leather, and paper for a low cost.

Custom_Projects' ATmega328-powered Smart Cubes can be programmed to play different games using blocks and a screen: www.reddit.com/r/ArduinoPro...

Sandesh Manik's Spectrum is an Arduino-controlled spray paint mixing machine that's capable of creating any color on demand.

Yuval Lombrozo taught an ATmega328-controlled parallel SCARA robot to play tic-tac-toe and Connect Four.

Conclusive Engineering's KSTR-SAMA5D27 is an all-in-one single-board computer based on the SAMA5D27 Cortex-A5 MPU. With low power consumption and a compact form factor, it's ideal for secure node computing and IoT solutions.

Just plug Albert David's ATtiny85-based USB volume knob into your computer for easy audio control.

Watch as we explore the capabilities of the PIC32-BZ6 Curiosity Board and demonstrate how it performs right out of the box. Perfect for beginners and developers looking to evaluate Microchip's PIC32BZ6 wireless MCUs for future projects!

MIT engineers have developed an ultrasound wristband that precisely tracks hand movements in real-time for robotics and VR control.

"A PIC18F47K42 is perhaps not the first part you would reach for to pursue any sort of video-based project. However, with the right techniques, you can get the 8-bit microcontroller pumping out the pixels surprisingly well."

Super-Resort-910's TAP Game is an ATmega328P-powered, pocket-sized two-player reaction game: www.reddit.com/r/electronic...

Dieu-de-l-elec's AngstromIO is an ATtiny1616 dev board that's barely bigger than a USB-C connector, measuring just 9x9mm: github.com/Dieu-de-l-el...

Gal Ofel created a solar-powered, ATmega4809-controlled system that automates the process of disrupting the mosquito breeding cycle in a standing water container.

Grecotron's PIC18F47K42-based serial VGA controller is capable of generating 16 colors at an impressive 360×480 resolution, while using minimal external components.

Mage Control Systems' CANBOB is an open source breakout board that enables USB or SPI to CAN communication using the MCP2515: github.com/Mage-Control...

Inspired by Engineezy, PUL built a fully 3D-printed 7-segment clock that runs on an ATmega328: youtu.be/8EJJ2QZ54tc

By leveraging a Flipper Zero equipped with Electronic Cats' MCP2515-equipped CAN Bus Add-on, transform the pocket-sized multi-tool into a serial to CAN bridge for analysis via SavvyCAN software.

The DOOMSCROLLER 300 is an Arduino-based device for your phone that lets you doomscroll without bumping into things.

Relive the glow of old screens and the boot sounds of early machines with Questwise Ventures' miniature terminal and retro tower duo on your desk.

Mika Wee hacked his Mercedes W212's HVAC console to automatically turn on air recirculation upon startup using an ATtiny85 and an optocoupler.

Will Warren details his journey to build the WCPU-1 homebrew 8-bit computer, from simulations to hardware prototype.

Mike Rigsby's Zeno is a hybrid household robot that'll deliver drinks and then throw them away.

John LeClair created an ATmega328-controlled manual vacuum pick-and-place device that makes populating SMD components both easier and efficient than with basic mechanical tweezers.

Mark Niu's bdwidth sensor is an ATmega328P-based, high-res optical width and motion sensor for 3D printers.

Turn your retro computer into a full gaming and audio powerhouse! This compact add-on board combines an AY-3-8910-compatible sound chip with a joystick interface for your old ZX Spectrum or Didaktik.