a relay having {HEAD ~ a coil} connected to {TAIL ~ the collection terminal} of the transistor and a switch connected between the power output terminal and the power output socket 
connected to
a relay having { HEAD ~ a coil } connected to { TAIL ~ the collection terminal } of the transistor and a switch connected between the power output terminal and the power output socket
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH