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isd 1000a

Discussion in 'General Electronics Chat' started by gm, Oct 7, 2002.

  1. gm

    gm New Member

    Joined:
    Oct 7, 2002
    Messages:
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    Hi,

    I have been trying to get the isd 1000a voice/record circuit to work and I am having problems. This is my second time at trying this circuit and both times have had very little success :x. I can get the playback to work, at least I think it is--I hear a capacitor pulsing for about 20 seconds then the sound ends. The part I can't seem to get to work is the record. I have tried two different mics and still no luck.
    This project is one from Radio Shack. I have followed the schematic as outlined. I have made other integrated circuits work. My experience is at the novice level.

    Any ideas appreciated.
    P.S. I believe the schematic from Radio Shack is incorrect.....
    thanks,
    GM
     
  2. kinjalgp

    kinjalgp Active Member

    Joined:
    Oct 28, 2002
    Messages:
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    Location:
    INDIA/USA
    Make sure of the polarity of the Condenser Mic. If used in reverse it won't work.

    Kinjal
     

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