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circuit stops responding after few seconds

Discussion in 'General Electronics Discussion' started by Abhinandan, Apr 24, 2015.

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  1. Abhinandan

    Abhinandan

    5
    0
    Apr 24, 2015
    i have made a dark sensor circuit and it stops responding to light after a few seconds and the bulb that i am controlling remains always on.....i have uploaded the schematic and board layout pls help
     

    Attached Files:

  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    Seems strange to me that you use Schottky diodes when almost any common diode would do. The 1N5819 is limited to 40V but you do not say what the input voltage is. You also do not say what transistors are used. I would think that a component is running too hard and is heating up, possibly T2.
     
    Abhinandan likes this.
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