diy projects
ESP32 AI Voice Assistant With Animated OLED Eyes (Whisper + GPT)
An ESP32 records your voice, asks Whisper and GPT for an answer, and talks back while an OLED shows blinking eyes. Here's how the…
esp32 & esp8266
Hide an ESP32-C3 IR Blaster Inside a Walnut for Smart Home Control
A maker hid an ESP32-C3 inside a walnut shell to beam IR commands at gear that never got a Wi-Fi upgrade. Here is how…
iot & smart home
IronEar’s ESP32-S3 Sensor Hears 500 Sounds, Skips the Camera
An open-source ESP32-S3 sensor node classifies 500+ household sounds on-device and reports to Home Assistant over MQTT or a private LoRa mesh.
microcontrollers
CircuitPython 11.0.0-alpha.1 Adds RP2350 Sleep Alarms
CircuitPython 11.0.0-alpha.1 adds RP2350 deep-sleep alarms, wake-on-pin support, and faster USB. Here's what changed and how to flash it this weekend.
esp32 & esp8266
Off-Grid LoRa Message Board Pairs ESP32-S3 with E-Ink Display
A battery-powered desk display that receives text messages over a LoRa mesh network with no WiFi needed, plus a built-in CO2 and humidity sensor.
raspberry pi
Raspberry Pi 5 and ESP32-S3 Power an Offline AI Steampunk Helmet
A Pi 5 runs a local LLM and video stream while an ESP32-S3 moves a servo eye. See how this offline wearable splits the…
diy projects
Nipkow Drum 3D Display: 1884 TV Tech Meets Fast LED Matrix Panels
A spinning drum with a spiral of holes plus 22,500 fps LED panels gives glasses-free 3D. Here's how James Brown's Nipkow display works and…
esp32 & esp8266
This ESP32 Reaction Wheel Cube Lands and Balances on One Edge
A five-inch cube launches itself off the table, stops mid-air, and lands balanced on one edge. The ESP32, IMU and reaction wheel inside explain…
iot & smart home
Tiny Contacts Fits Four Relays Onto a 42 x 38 mm ESP32 Board
Four Omron surface-mount relays on a 42 x 38 mm board, driven by a ULN2003A so your ESP32 GPIO pins never touch a relay…
diy projects
Brass Tubing Is the Frame and the Ground in This ESP32 Handheld
No PCB, no printed shell. Huy Vector bent 2 mm brass tubing into a handheld console frame and used the metal itself as the…
esp32 & esp8266
Petoi’s Quaddle Is a Foldable ESP32-S3 Quadruped Robot for $99
Petoi packed omnidirectional walking into four servos and an ESP32-S3, then made the legs fold flat. Here is what the $99 Quaddle can actually…
esp32 & esp8266
Build a $10 ESP32-C3 Fridge Monitor That Logs Its Own Data
A $10 XIAO ESP32C3 and a DHT22 keep 30 minutes of fridge temperature history on-device, cutting network traffic by 92 percent. A tidy weekend…