Light sensor circuit diagrams
Laser Communication System
This is a simple Laser communication system. It can transmit and receive signal from any audio device. Read more...Dark-activated 230V Lamp
Compact circuitry using small-size parts only Can be wired in parallel to existing switches Read more...Dark Activated Switch
This circuit will activate a relay when light falls to a preset level. Light level can be adjusted with VR1 and the relay contacts may be used to operate an external light or buzzer. Read more...Electronic Night Light
This circuit for an electronic night light was submitted by Adam from Canada. Read more...Parking Light Switch
This is a simple parking light switch. The idea is that you drive your car towards your garage. You shine your headlights at the sensor, which switches on an external light . If you don't have a garage the sensor can be placed on a wall or post, and the external light will illuminate the area while you park and leave your vehicle. The circuit also has manual on and off controls. Read more...Light Detector Circuit
The circuit uses a CMOS 4001 IC. Gate U1a acts as the trigger, U1b and c form a latch. S1 resets the circuit. Read more...Sound of Light Circuit
The circuit uses a solar cell as the input transducer, blocks the DC produced by the cell, but amplifies the light received by the cell. Sunlight, moonlight, torchlight all produce sound which is amplified by this circuit. Read more...
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