Photo Detector Circuits

This circuit provides the output from one condition to 0 ((high to low) when the Photo Transistor get enough light .. VR-1 is used to adjust the sensitivity of the photo transistor (adjust to the conditions of light conditions).
Please add a relay drive circuit to be applied to the lamp park or apply any match you want. Relay serves to disconnect and connect the electrical current. Good luck!

Part List :

R1=270ohm C1-2=100nF 100V ceramic IC2=74HCT13
R2-5=1Kohm RV1=10Kohm trimmer Q1=BP103 Phototransistor Siemens
R3=10Kohm D1-2=1N4148
R4=100ohm IC1=CA3130

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