Audio switcher

Discussion in 'The Projects Forum' started by mpatterson557, Sep 4, 2011.

  1. mpatterson557

    Thread Starter New Member

    Jul 3, 2010
    21
    0
    I would like to take 2 or three audio headphone inputs As a1 a2 a3
    and one output o1
    if audio exists on a1 then switch a2 off shunt then turn on a1
    after a timedelay then switch off a1 shunt and turn on a2

    this could be nested so that a third audio input can be accepted.
    i would like to work with 6v powersupply as well

    Solution 1:
    a MAX4765ETC
    (http://www.maxim-ic.com/datasheet/index.mvp/id/4173)
    looks like it will do the trick, but how to intergrate and connect up is a question. also how would i include a time delay. just so that pauses in speech wont chatter the signal.

    solution two:
    combine this voice over ptt schematic
    (http://www.zen22142.zen.co.uk/Circuits/Audio/v_over.htm)
    with this audio sensor
    (http://www.discovercircuits.com/PDF-FILES/AUDIODETECT1.pdf)

    or solution three:
    http://www.edaboard.com/thread199169.html


    which solution should i pursue given a 6v battery supply desire to control the time before switch return occurs?
     
  2. mpatterson557

    Thread Starter New Member

    Jul 3, 2010
    21
    0
    I would really appreciate some advice on this one.
     
  3. mpatterson557

    Thread Starter New Member

    Jul 3, 2010
    21
    0
    Can someone at please point the way in which I should go?
     
  4. mpatterson557

    Thread Starter New Member

    Jul 3, 2010
    21
    0
    bump please
     
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