esp32 & esp8266
Olimex UEXT-CH390 Adds Wired Ethernet to ESP32 and Pico
Olimex's EUR 4.95 UEXT-CH390 brings 100 Mbit wired Ethernet to RP2040 and ESP32 boards, with ESPHome support. Here is a weekend plan to try…
diy projects
BEAM Robot Pet: A Solar Walker With No Microcontroller
ALTco built a battery-free robot pet that roams toward light using 74HC240 chips and coupled oscillators, no code at all. See how it works…
diy projects
Weekend Build: ESP32 Game Boy Emulator on an ST7735 LCD
Engineeroids turned a spare ST7735 LCD and an ESP32 DevKit into a Game Boy emulator on perfboard. Here is the parts list and the…
esp32 & esp8266
ESP32-S3 Flight Controller With Pixhawk-Style Ports
The Engineer built a modular ESP32-S3 flight controller with an SPI IMU, split 3.3 V rails, and Pixhawk-style JST-GH ports for any DIY RC…
microcontrollers
STM32 Gets One Platform: What ST’s Cortex-M Shift Means
ST is unifying STM32 around Arm Cortex-M, with new STM32A parts and a 280 MHz STM32G5. Here is a weekend plan to test what…
esp32 & esp8266
Olimex UEXT-CH390 Adds Wired Ethernet to Pico and ESP32
A 4.95 EUR open source UEXT module gives Pico, Pico 2 and Wi-Fi-only ESP32 boards a wired 100 Mbit Ethernet link. Here is what…
esp32 & esp8266
ESP32-CAM Turns a Cheap Blood Pressure Monitor Smart
Tomasz Burzy gave a secondhand blood pressure monitor Wi-Fi by pointing an ESP32-CAM at its seven-segment display. No OCR, no reverse engineering.
diy projects
Recovery Kit 3: A Dual-Battery Raspberry Pi Cyberdeck
Jay Doscher's Recovery Kit 3 packs a Raspberry Pi 4, a 13.3-inch AMOLED screen, and two 99Wh batteries into a rugged case. No soldering…
arduino
Fetch: An Arduino UNO Q Robot That Plays Ball With You
Fetch pairs an Arduino UNO Q with a custom vision model to chase a ball, scoop it up, and hand it back to you.…
diy projects
Sonicare Toothbrush NFC Chip Hacked With an ESP32-S3 and PN532
A Sonicare brush head hides a battery-free NFC chip. See how an ESP32-S3 and PN532 read its wear data and turn it into a…
diy projects
SAWbot: One-Motor Amphibious Robot Swims and Crawls on Land
SAWbot swims with a single motor and a traveling-wave membrane, hits 34 cm/s, then drives onto land on treads. Here is how a student…
diy projects
Analog Redial: ESP32-C6 Brings Rotary Phones Back to Life
An ESP32-C6, an audio codec, and a SLIC chip let old rotary phones call each other, run an answering machine, and even ring for…