Single Channel Relay for Grove
A relay is a digital controlled mechanical switch that is capable of switching much higher voltages and currents than your normal Arduino boards. When set to HIGH, the LED will light up and the relay will close allowing current to flow. These guys can handle 250V at 10 amps!
Please use caution when working with mains voltages — if in doubt contact an electrician for help.
For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product.