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