IC &Audio transformer equivalent

Discussion in 'General Electronics Chat' started by lanre, Sep 1, 2005.

  1. lanre

    Thread Starter New Member

    Sep 1, 2005
    3
    0
    Pls, I have got an intercom circuit from a site that uses MC145436 DTMF decoder but the IC is obsolete, how do I get the equivalent becos I've searched to no avail.

    Also, I need a 1k/8R centre-tapped at 1K winding audio xformer for the ringer cct of d same project, I read that using a mains xfomer (for 12V operation, 60v centre-tapped secondary and 230v prmary), one could achieve the same, Is it possible/true?

    Which scrap can I easily get audio transformer for me to use?

    Pls, my project is being delayed due to these two problems.

    Lanre
    Nigeria
     
  2. CIRCUITPRO

    New Member

    Nov 21, 2009
    4
    0
  3. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    audio transformer can be found at Rat Shack (Radio Shack, you have questions, they have blank stares!) just picked one up a few weeks ago.....
     
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