microcontrollers
CircuitPython 10.3.0 Alpha 4 Brings Audio Effects to RP2040
CircuitPython 10.3.0-alpha.4 adds new audio effects to RP2040 and RP2350 boards, three settings.toml keys, and an SPI baudrate change worth knowing.
diy projects
AirMeter: Stream an AN870 Multimeter’s LCD to Your Browser
A hacker tapped a cheap AN870 multimeter's LCD lines with an RP2040 and streamed live readings to any browser over 433 MHz. Here's how…
microcontrollers
Olimex PICO-EVB Turns a Raspberry Pi Pico Into a Mini-PLC
Olimex PICO-EVB turns a Raspberry Pi Pico into a real PLC: four 15A relays, optoisolated inputs, and Home Assistant support for about $17.
arduino
Meet Pinch: A 32-Bit Arduino Board Smaller Than a Fingernail
The Moddo Pinch is a 32-bit Arduino-compatible dev board just 10.5 x 10.9 mm, packing a SAM D11, 15 GPIO pins, and an RGB…
diy projects
Build an Offline Privacy Security Camera on PocketBeagle 2
A weekend build: a PocketBeagle 2 security camera that runs person detection locally and keeps every frame off the cloud and under your control.
microcontrollers
Moonshine Micro Puts Voice AI on a Sub-$1 RP2350 Chip
A new open-source toolkit squeezes voice detection, speech-to-text, and text-to-speech onto the sub-$1 RP2350, no cloud required.
arduino
Pinch: A Fingertip-Sized 32-Bit Arduino-Compatible Dev Board
The pinch crams a 32-bit Arduino-compatible board onto something the size of a USB-C plug: 15 GPIO pins, native USB, and a $16 pre-order.
diy projects
Porting Apache NuttX to the Adafruit Fruit Jam to Run Doom
A forum maker ported Apache NuttX to the Adafruit Fruit Jam, adding USB input and a DVI framebuffer to run LVGL demos and even…
esp32 & esp8266
Focus: The Open-Source UI Framework Behind an ESP32 E-Reader
Focus is an open-source C++ framework that brings app-style menus, view controllers, and safe scheduling to the ESP32 and other tiny-RAM boards.
diy projects
A Palm-Sized Battery Bench Power Supply Built on the ATtiny3216
Ben Makes Everything built a palm-sized battery bench power supply with 0.8V to 22V output, USB-C PD charging, and an ATtiny3216 running the show.
diy projects
This Giant ATmega Chip Doubles as a Qi Wireless Charger
Nick Electronics supersized the ATmega chip every Arduino fan loves into a working Qi wireless charger, three prototypes and one 90C meltdown later.
diy projects
Build a Live Flight Tracker on the Feather RP2350 This Weekend
Turn a Feather RP2350 and a 3.5-inch TFT into a desktop flight tracker that spots planes on 1090 MHz and even flags lunar transits…