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power on delay circuit

Discussion in 'Electronic Design' started by chitta, Mar 6, 2008.

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  1. chitta

    chitta Guest

    Hi
    My name is chittaranjan
    Pls help me realise the following waveform on power ON
    1. HIGH for 2 sec after power ON
    2. LOW for 2sec
    3.HIGH permanently
     
  2. MooseFET

    MooseFET Guest

    With the specs you gave I would suggest:

    Clock motor + brush contacts + 100KV supply.
     
  3. Randy

    Randy Guest

    You need to give more info...the waveform is the POWER supply
    waveform, or just a signal waveform that is generated on power up?

    In either event, a monostable multivibrator ckt in non-retrigger mode,
    with a couple of flip-flops will do the trick. If this mediates the
    downstream power supply, then a power transistor as well.
     
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