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.

The trickier part was getting the original bells to work — in North America, it takes up to 90 VAC to get a phone’s ringer going, which is quite a bit more than the lowly Arduino can handle.

Witness how to create a powerful long-range remote control using Arduino technology. This guide takes you through the process of building a customizable, multi-channel RC system that offers ...