Seeed grove motion sensor control and actuator modules seeed studio 103020014 the grove dry reed relay from seeed studio allows your microcontroller project to switch power to light resistive loads of up to 1a at 60v dc reed relays are different from normal relays as their contacts are sealed in a glass tube protecting them from corrosion giving them a long life the grove module has two screw terminal contacts for attaching the load seeed provide technical documentation example project