An infrared proximity sensor reacts when an object approaches a certain distance. The relay will activate and turn the circuit on or off.The composition of the kit for assembling the proximity sensor:
PCB x1
CD4093 DIP x1
14 pin IC socket x1
KF301-2P Terminal Block x2
12V Relay x1
1N4007 diode x2
1N4148 diode x3
3 MM red LED x1
940 emitter (white) x1
940 infrared receiver (Black) x1
9012 transistors x4
9013 transistor x1
1 w ohm resistor x1
33ohm 1W resistor x1
105 blue potentiometer x1
1K resistor x3
10K resistor x3
22k resistor x1
82K resistor x2
220K resistor x2
5.1M resistor x1
10M resistor x1
104 monolithic capacitor x3
47UF25V Electrolytic Capacitor x1
Electrolytic Capacitor 100UF25V x1
Cost: ~ 125