Frequency detection (audio)

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  1. - 7th June 2012, 16:44 #1
    HankMcSpank's Avatar
    HankMcSpank
    HankMcSpank is offline Senior Member
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    Default Re: Frequency detection (audo)

    Quote Originally Posted by Archangel View Post
    500 hz is the first harmonic negative of 1 Khz. some Pi filters might help or lower the input gain
    I don't think that's the issue, here's a scope screenshot of what the PIC's internal comparator is seeing internally...





    The white parameters window to the right is my scope's take on the waveform it is displaying (1khz)

    The green text on the left is the PIC spitting out the TMR1 counts it's counted between comparator2 interrupts serially to my PC com port.
    Last edited by HankMcSpank; - 7th June 2012 at 16:51.
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