Seeed grove user interface and control modules seeed studio 103020005 the grove relay board from seeed studio will let you switch on higher voltage equipment up to 10a at 250v ac or up to 30v dc screw terminal are provided to connect the device you want to switch a single digital ouput line is used a logic 1 turns the device on a logic zero turns it offseeed provide technical documentation example projects and software libraries on their product pages if you require this informatio