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 Arduino nano and relay module with 4 relays (see picture above) was used to simulate and replace the guitar 3-step switch. The project for Arduino is in PlatformIoClamp15. Node-red was used to ...

Relay-Module-With-ESP32 Project Description This project contains Arduino code for an ESP32 microcontroller to control a relay module, which in turn controls lights, to create a variety of blinking ...

The resistance value varies per manufacturer, but 220Ω per leg is a safe bet. Tip: learn how to power light bulbs using Arduino with a relay module. What You’ll Need If you’re ready to get started, ...