{TAIL ~ a transistor} having a base terminal connected to the microprocessor, {HEAD ~ a collector terminal} and an emitter terminal connected to ground; and 
{ TAIL ~ a transistor } having a base terminal connected to the microprocessor , { HEAD ~ a collector terminal } and an emitter terminal connected to ground ; and
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH