PICAXE Controlled Audio Switch

Discussion in 'The Projects Forum' started by Danno72, Aug 20, 2014.

  1. Danno72

    Thread Starter New Member

    Feb 5, 2009

    I am looking to make an audio switch, using a PICAXE.

    I've been looking for a way of being able to switch between audio sources and would like to stay away from relays and use something more discreet.

    All the axe will do is send a signal to a device to change between 2 inputs, but I'm unable to find what the best device would be.

    Anyone got any suggestions?
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    Sounds complicated.

    The obvious way to do it is:
    1) Analog audio signal 1 goes to axe ADC 1. Analog audio signal 2 goes to axe ADC 2.
    2) Analog audio signal exit axe from DAC 1 and goes
    3) Use some kind of switch to tell axe to use either ADC 1 or ADC 2.
    Seems too complicated. And there are issues with digitizing input (using ADC) and then converting digital back to analog (using DAC).

    I would think using a simply two poll switch would be easier, but I don't know how well such switches work in audio.
  3. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
    Take a look at the 4066 IC. It is often used for audio switching. It has four SPST switches that can be controlled by your microcontroller.
  4. Veracohr

    Well-Known Member

    Jan 3, 2011
    For my senior project I used ADG1436, a dual SPDT switch, for audio switching.
  5. shteii01

    AAC Fanatic!

    Feb 19, 2010
    That is nice. Right on the first page it says:
    Audio signal routing