TV audio voltage levels

Discussion in 'General Electronics Chat' started by miguelpedroso, Jan 6, 2013.

  1. miguelpedroso

    Thread Starter New Member

    Aug 13, 2012
    26
    0
    Hey guys, I'm working on a project involving a PIC microcontroller and the generation of composite video signal.

    Now I want to generate some tones and play them in the TV speaker (using an RCA cable for audio). Does anyone know what audio voltage levels are safe to send to the TV set?

    Thank you all! :)
     
  2. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    Audio input is Line Level

    ~1V AC (1.5v peak-peak) with 10k output impedance should work with about everything.
     
  3. miguelpedroso

    Thread Starter New Member

    Aug 13, 2012
    26
    0
    Oh, all right, thank you very much! :)
     
  4. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,026
    3,789
    I would be interested to see what you come up with for audio from a PIC. Will you use just the pic or will you use some type of sound chip too, e.g AY-3-8710 series? Still some floating around.

    Cheers.
     
  5. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    dont forget your tv uses a smps which means the chassis of the set is live....if you dont design your circuit to cater for this there will be a very expensive bang on switch on....
     
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