Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Inspired by the 2001 movie, AI Artificial Intelligence, I'm converting Tickle-Me Elmo into a robot version! The base controls ...

The audio component centers around the SS8550 PNP transistor (Q1) which serves as a driver for the passive buzzer (BZ1). This ...