TCR5000 Optical sensor
This sensor can detect difference between e.g. black and white, and is widely used to electronically read water- or electricity meters. Since the sensitivity is adjustable, the sensor can be calibrated very accurately.
This sensor can detect a difference between, for example, black and white, in the nodo project these are often used to, for example, use the turntable of a meter to keep track of consumption. Because the sensitivity is adjustable, it can be adjusted very precisely so that reflection does not have to be a problem.
There are 2 LEDs on it so that you can see exactly whether the sensor is on and whether there is detection.
1 VCC external 3.3V-5V
2 GND external GND
3 DO small digital output interface (0 and 1)
4 AO small analog output interface (0-5V)