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    Audio input to Arduino

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    This circuit is Arduino microphone shield. It receives audio thru microphone and delivers it to Arduino analog input..Can anyone tell me how to modify the input to take audio from speaker jack or line-out instead of the microphone ?

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    Re: Audio input to Arduino

    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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    Re: Audio input to Arduino

    This circuit is Arduino microphone shield. It receives audio thru microphone and delivers it to Arduino analog input.
    Completely wrong. Review the circuit description
    Detects sound from silence and outputs digital trigger signal.



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    Re: Audio input to Arduino

    Quote Originally Posted by FvM View Post
    Completely wrong. Review the circuit description
    the question is how to replace the mic input of this circuit into a line out from a radio or ipod.?

    - - - Updated - - -

    Quote Originally Posted by KlausST View Post
    Hi,



    Klaus
    Thanks Klaus, did u try it urself? there is no fruitful result. I clicked alot of these results, they all bark at the wrong tree.



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    Re: Audio input to Arduino

    Remove everything before the LM393.
    Connect a resistor (1K ideally but as a higher level may be needed, try 10K) from pin 3 to ground.
    Connect the 'line out' from the radio/ipod across the resistor.

    As pointed out, this is not for digitizing sound, it just produces a square wave out when the input level exceeds a certain voltage. It is suitable for triggering something when audio is fed in but it cannot be used for recording usable music or speech.

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    Re: Audio input to Arduino

    @betwixt: do you mean like this ??
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    Re: Audio input to Arduino

    That is correct.

    Please bear in mind the potentiometer is a sensitivity control, not a volume control. The circuit does not digitize the audio, it only detects whether it is present or not.

    Brian.
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