Designed with the reflected infrared sensor, indicator light.
Built in a potentiometer for sensitivity control.
On-board LM393 voltage comparator chip and infrared sensing probe TCRT5000L
Onboard signal output instructions, the output is the highly effective signal at the same time, the indicator lamp light output signal can be directly and single-chip microcomputer IO connection & middot
Signal detection sensitivity can adjust
Reserve all the way more circuits (P3 voltage drawn)
