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Single Channel 5V Relay Module

This is a single channel relay shield, you can now turn on and off lamps, fans, solenoids, and other small appliances that run on up to 250VAC or DC power. The 8550 transistor drive, driveability. A fixed bolt holes for easy installation. It has a relay status indicator led Power LED(Green), 1 relay status indicator LED(Red) Relay control interface by single-chip IO. Low-level suction close, high-level release. Easy to use, simple 3 line structure. Getting started with the Single Channel 5V Relay Module (SONGLE) Sometimes you want your Arduino to control AC powered devices like lamps, fans or other household devices. But because the Arduino operates at 5 volts, it cannot directly control these higher voltage devices. That’s where the relay module comes in. You can use a relay module to control the AC mains and Arduino to control the relay. This tutorial walks you through how to setup the one channel relay module to switch on a lamp or other device, but let’s begin with a short introduction into relays.