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.

An example of a simple way to command one (or several) Arduino relay(s) via a HTML & PHP web page. I did this for my student project. Please, note that the way to command the Arduino board over serial ...

Arduino繼電器教程(Arduino Relay Tutorial). Contribute to jash-git/Arduino-Relay-Tutorial development by creating an account on GitHub.

Arduino Relay Basics - How It Works and How to Use It. Posted: June 3, 2025 | Last updated: June 3, 2025. Hi, I'm Bill. I'm a software developer with a passion for making and electronics.