This electronic circuit is an avoidance sensor that unlike commercial sensors, haven't issue of sun light interference !
You can order this PCB from here:
https://www.pcbway.com/project/shareproject/W158454ASC79_Gerber_Avoidance_Sensor.html
Parts list:
IC NE555
IC LM567
IC Socket 8pin (2pcs)
Infrared sensor TCRT 5000
LED
Resistor 120 ohm
Resistor 680 ohm
Resistor 1M
Resistor 100K
Resistor 51K
Resistor 3.3K
Resistor 10K
Capacitor 100nF
Capacitor 1.5nF
Capacitor 20nF
Capacitor 100uF
Capacitor 2.2uF
Capacitor 1uF
Circuit Diagram:
Video:
In following video you can see how this circuit works.
