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