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maintaining 12 V

Discussion in 'Electronic Basics' started by [email protected], May 30, 2008.

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  1. Guest

    hi.
    well i have to implement an intelligent lighting system. after
    detecting the person from PIR sensors, light has to be switched on for
    some time only at night time. Im using a 12 V battery as a power
    source which is powered by solar pannel.
    im having the problem in keeping the battery output constantly at 12
    V, because after sometime the voltage is bound to drop, and the
    circuitry will not work properly in fluctuating voltage.
     
  2. Bob Monsen

    Bob Monsen Guest


    You need more batteries!

    Also, Google for 'sepic'.

    Regards,
    Bob Monsen
     
  3. Jamie

    Jamie Guest

    if you used lower voltage circuitry, you can thus use a regulator
    to operate the control electronics.
    5 volt operation is common.

    to keep your unit not working during light hours, employ a photo
    cell that inhibits the circuit. Just mount it behind a lamp so it
    won't see it self and oscillate.

    If you take a part one of those cheap out side automatic flood
    light systems, you'll find most likely the internal electronics
    operates on low voltage. You have every thing you need there.

    http://webpages.charter.net/jamie_5"
     
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