Relay Boards

Relay Boards with Driver Circuit, TTL Inputs

2 Channel TTL Relay Board, SPDT 15A Relays
4 Channel TTL Relay Board, SPDT 15A Relays

Passive Relay Boards (coils driven directly from control inputs; no driver circuit)

4 Channel Passive Relay Board, SPDT 15A Relays
4 Channel Passive Relay Board, DPDT 5A Relays