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    bwilly's Avatar
    bwilly Posts: 42, Reputation: 2
    Junior Member
    		  
    #1

    Sep 4, 2011, 11:44 AM
    Photocell Circuit
    Would someone be able to provide a schematic of a circuit with a photocell for a dawn to dusk switch. The input and output will be 12 vDC. I have found circuits that reduce the output for an LED but I need the same voltage for the output.
    Thank you
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
    Internet Research Expert
    		  
    #2

    Sep 4, 2011, 02:24 PM
    Here is one on thi page:

    Ref:
    Photocell Sensor: Basic 12 Volt Light Sensor Detector Switch Circuit
    bwilly's Avatar
    bwilly Posts: 42, Reputation: 2
    Junior Member
    		  
    #3

    Sep 4, 2011, 06:23 PM
    Califdadof3:
    Thank you for the link that was what I was looking for. Just one additional question what is IC1? I know it is an integrated circuit/transistor but what size should it be? The schematic calls it a voltage comparator. Thank you again for your assistance.
    bwilly
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
    Internet Research Expert
    		  
    #4

    Sep 4, 2011, 07:14 PM
    Its something like this. The diagram is a basic circuit. This shows the outputs.

    Voltage Comparators
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