Using infrared reflective sensor TCRT5000
The detection distance: 1mm ~ 8mm apply focal distance of 2.5mm.
The comparator output signal clean, good waveform, driving ability, more than 15mA.
With a multi-turn precision potentiometer adjustable sensitivity adjustment.
The working voltage of 3.3V-5V
The output format: digital switching outputs (0 and 1)
A fixed bolt holes for easy installation
A small PCB board size: 3.2cm x 1.4cm
Using a wide voltage LM393 comparator