The first output terminal 130 of the microprocessor 13 is connected to a first input terminal of {TAIL ~ the trigger} 143 via {HEAD ~ a diode}  
The first output terminal 130 of the microprocessor 13 is connected to a first input terminal of { TAIL ~ the trigger } 143 via { HEAD ~ a diode }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH