Seeed raspberry pi relay board seeed studio 103030029 p the raspberry pi relay board from seeed studio gives you 4 relays that will switch 15a at 30v dc 250v ac each easily enough for most applications the board uses the older 26 pin gpio connector so it s compatible with every pi from the old a to the new zero screw terminals are provided for the connections to the device being switched and an led indicator shows the status of each relay s normally open no contacts your pi can control