Is there a circuit that can control a switch with an on & off pattern of light hitting a LDR?

LDR can make good switches, but can a switch be made based on a pre-set on & off pattern? For example, If the light going to the LDR is disrupted (say 10 times), then and only then is the switch activated.

1 Answer

  • 6 years ago
    Best Answer

    Yes, If you let the LDR (photocell) drive a counter which counts pulses and when "Your' count happens it activates a relay turning on/off your load.

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