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Thread: Need help on power on pulse

  1. 05-31-2002, 12:08 PM #1
    Jothen
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    Need help on power on pulse

    Been working on this circuit with little success so far.
    My current circuit is mainly using a bunch of nand gates.
    Looking for ideas on a new circuit approach.

    I need a circuit that does the following.
    When the car turns on and power is on the accessory socket for 2-3 seconds, then a pulse is sent to a relay which will wake my notebook from suspend. I also need a pulse when the car turns off to put the notebook back in suspend. The pulse needs to be short enough so the relay doesn't close that long.

    Jothen
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  2. 06-03-2002, 11:10 AM #2
    Rob
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    555

    Would a 555 chip work? also do you have a copy of your schematic? (both before and after you converted everything to nand gates)

    Rob
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)
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  3. 06-04-2002, 08:28 AM #3
    Jothen
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    I have tried using the 555 timer, but so far I have not been able to generate a pulse yet.
    Current circuit using nand gates.


    Jothen
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