threeboardslab
// initializing_workbench…

threeboardslab

Low level. High impact.

Hands-on robotics and microcontrollers. ESP32, Arduino, Raspberry Pi — code, photos, and video from the bench.

Browse projects → Follow on Instagram
2026-10-06
  • esp32
  • max9814
  • sound-sensor

Office Noise Detector

A desktop ESP32 that hears the room and tells it to be quiet — MAX9814 mic, active buzzer, and a threshold that calibrates itself to the room at boot.

read build →
2026-10-04
  • esp32
  • mq-2
  • gas-sensor

ESP32 Smoke Detector v2

Watch smoke and gas levels live on a TFT as a percentage, and get a Telegram alert on your phone the moment the air crosses the line. An ESP32 + MQ-2 build for under $25.

read build →
2025-05-27
  • Arduino
  • MQ-2
  • Safety

DIY Smoke Detector for $4

Build a working smoke detector with an Arduino, MQ-2 sensor, two LEDs and a buzzer. Green means safe. Red means get out.

read build →
// microcontroller

ESP32

Wi-Fi + Bluetooth, dual-core. The workhorse for connected builds and dashboards.

// classic

Arduino

Uno, Nano, Mega — when the job is sensors, motors, and dependable real-time loops.

// linux node

Raspberry Pi

For builds that need a real OS, cameras, computer vision, or a web UI.