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Light sensor circuit diagrams

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Photo detector
Photo detector
April 23, 2010

This circuit give low level output, when exist enough lighting, that is a detector of light. It can give, say ,command turn on somebodies lights, when fall the dark. His exit is compatible with TTL... [more]

Light sensitive and differential temperature switch
Light sensitive and differential temperature switch
April 23, 2010

Light sensitive and differential temperature switch [more]

Two Light Controlled Relays
Two Light Controlled Relays
April 11, 2010

These two circuits use LDRs (Light Dependent Resistors). Circuit No.1 energizes the relay when the light rises above a preset level. Use it to switch things on at dawn. Circuit No.2 energizes the relay when... [more]



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