Light sensor circuit diagrams

Light sensor circuit diagrams

Light sensor circuit diagrams

Light sensor circuit diagrams

Light sensor circuit diagrams

This circuit has two distinct functions, either using the same light sensor, a circuit module is useful for light and turn off the lights (relay), and that only produce sound. Usually applies to a security alarm place. Components used:

Sensor LDR
2N3904
Relay
Audio alarm using LM386

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