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Mic Jack Input

Discussion in 'Android Lounge' started by wombol, Jan 9, 2012.

  1. wombol

    wombol Lurker
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    Jan 9, 2012
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    Hi guys,

    I have a question (2, in fact) about the microphone input on the audio jack. I read somewhere on the interwebs that passing a square wave into standard audio drivers can cause damage, possibly due to the DC levels of the square wave. I am looking to send pulses of square waves (some at ~80Hz, some at 60Hz with varying duty cycles) through the jack, and I am wondering if it is safe to just transmit that wave or whether I should use Digital-to-analogue conversion (DAC) to produce a sinusoidal wave?

    On a related note, does anybody know the standard voltage level the mic input should take, as I don't want to damage it.

    Thanks everybody,

    Sam
     

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