esp32 & esp8266
Turn Escape Room Puzzles into Home Assistant Devices with ESP32
Two open source Arduino libraries turn escape room puzzles into Home Assistant devices over MQTT. Here's the parts list and the I2C wiring to…
diy projects
Build an ’80s Brick Phone with a Raspberry Pi Pico and Bluetooth
A Pico, a Bluetooth HFP module, and a keypad turn into a retro brick handset that answers your iPhone's calls. Here is how it…
diy projects
LED Bubble Hair Extensions with Motion-Reactive Rain Effects
Braid 2020 NeoPixel seed pixels into hair and let an RP2040 Feather and accelerometer turn a head shake into rain and lightning. A weekend…
diy projects
CircuitPython POV Bike Wheel: Floating Images on 6 LED Strips
Six DotStar strips, a Feather RP2040, and a magnet sensor make a bike wheel draw images in mid-air. See how the timing trick works…
diy projects
Flip-Dot Display Turns Fluid Physics Into Sound on a Pi Pico 2 W
A maker swapped silent LEDs for a room-filling flip-dot panel that physically clacks out real fluid physics, steered by a joystick and a hidden…
diy projects
Raspberry Pi Pico Revives a Discontinued Heathkit Packet Radio Modem
A maker resurrected a discontinued 1980s Heathkit packet radio modem by making a $4 Raspberry Pi Pico run the exact original firmware itself.
microcontrollers
Seeed XIAO SAMD21 Plus and RP2040 Plus Double the GPIO Count
Seeed kept the postage-stamp footprint but pushed the XIAO SAMD21 to 30 GPIO and the RP2040 to 29, with onboard battery charging from $4.90.
microcontrollers
Olimex’s Neo6502kbd Hides a Real MOS 6502 Inside a 50-Euro Keyboard
Olimex put a genuine WDC W65C02 under a wedge-shaped keyboard, paired it with an RP2040 for video and USB, and priced the Apple II…
microcontrollers
Add a CircuitPython Watchdog So Your Build Reboots Itself
A frozen microcontroller mid-demo is fixable in ten lines. The CircuitPython watchdog module lets your board detect its own hang and reset itself.
diy projects
Clough42’s GPS Clock Spins Its Numbers with a Pico and TMC2208
A GPS module, a Raspberry Pi Pico, and two TMC2208 drivers spin machined wheels to show time that never needs setting. Here is how…
raspberry pi
Build a Pocket Route Finder on Raspberry Pi Pico with Dijkstra
A Pico, an SPI LCD and about 60 lines of MicroPython turn Dijkstra's 1956 algorithm into a handheld that finds the cheapest route between…
diy projects
Motion-Reactive LED Devil Horns Built on an RP2040 Prop Feather
Paper-mache horns lined with 4 mm NeoPixel strip, an RP2040 Prop-Maker Feather reading your head gestures, and two animations that answer with fire.