A 4-way intersection traffic light controller built on Arduino, with a live LCD countdown and Serial-adjustable timing — implemented using non-blocking (millis()-based) timing rather than delay().

Compared to the Arduino Uno of old, modern microcontrollers are absolutely tiny — especially for the amount of processing power and I/O you get. But if you need something really small, like ...

This tutorial shows us how to build our own functional DIY ESP32 metal detector from scratch using an affordable Wi-Fi… ...