siren project

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Discussion in 'General Electronics Chat' started by iamapril, Feb 12, 2012.

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  1. Feb 12, 2012 #1
    iamapril

    Thread Starter New Member

    Feb 8, 2012
    12
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    Good evening! need your help guys! what is the purpose of the 10nF capacitor in series with 22K resistor in this circuit?

    >circuit attached
     
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  2. Feb 12, 2012 #2
    Wendy

    Moderator

    Mar 24, 2008
    21,203
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