Additionally, the preferred signal detection and {HEAD ~ logic} includes an operational amplifier connected to the output of the light sensor and an analog to digital converter connected to the output of {TAIL ~ the operational amplifier} 
Additionally , the preferred signal detection and { HEAD ~ logic } includes an operational amplifier connected to the output of the light sensor and an analog to digital converter connected to the output of { TAIL ~ the operational amplifier }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL