diy projects
Motorola T900 Pager Mod: Meshtastic Messaging on ESP32-S3
A Motorola T900 pager gets a Heltec V4 brain and LoRa mesh messaging while keeping its keyboard and LCD. See how the retro hack…
microcontrollers
Olimex Level Shifters Fix 3.3V to 5V Breadboard Headaches
Olimex's two new open hardware level shifters translate 1.65 V to 5.5 V on I2C, SPI and UART. Here's where they fit on your…
diy projects
Nokia 3310 Pico Mod: Go Game Engine on an 84×48 Screen
A Pico-powered PCB and a Go game engine bring new games to the Nokia 3310's 84x48 screen. Here is how Hoani Bryson's Jam-winning build…
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…
esp32 & esp8266
M5Stack ToughC5: Rugged ESP32-C5 Board for Outdoor IoT
M5Stack's ToughC5 puts an ESP32-C5, Wi-Fi 6, Zigbee and a sunlight-readable touchscreen in a rugged case for $49.90. Here is what outdoor IoT builders…
microcontrollers
RP2350 Laser Attack: Ledger Donjon Re-Enables Debug
Ledger Donjon used a laser and about $250,000 of lab gear to re-enable debug on a locked RP2350-A4. Here is why Raspberry Pi will…
robotics
MIT Roughened Optical Fibers Sense 3D Shape in Soft Silicone
MIT embedded roughened rubber waveguides in silicone to track 3D shape with under 0.4 cm error. Here's how to try the same light-loss trick…
microcontrollers
Toshiba TXZ+ M4H: 120 MHz Cortex-M4F Entry-Level MCU
Toshiba's new TXZ+ M4H microcontrollers pack a 120 MHz Cortex-M4F, 256 kB flash, and up to 51 GPIO into an entry-class part. Here's what…
diy projects
ESP32 AI Calculator V2 Reads Your Handwritten Equations
This open source ESP32 calculator has a camera and two displays, so it can read a handwritten equation and solve it with cloud or…
diy projects
PhoneBot: Turn an Old Android Phone into a $400 Humanoid Robot
UCLA's PhoneBot uses a $50 Android phone as the brain of a 13-joint humanoid. See how it works and how to try the same…
sensors & modules
Sipeed SLogic32U3: A 1.4 GS/s Logic Analyzer for Student Budgets
Sipeed's SLogic32U3 hits 1.4 GS/s over USB 3.2 with 32 channels and a browser app. Here is what it adds and how to learn…
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…