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  1. Poubella

    Designing a sound detector

    Yeah I know simulation tools are perfidious, but they are so easy to use! :-) A PLL seems to be clever and efficient, I will investigate that way! Thanks for helping
  2. Poubella

    Designing a sound detector

    Thanks for answers! « It doesn’t work » means that all frequencies are attenuated by the filter: when I sweep the input frequency from 1 Hz to 10 kHz, the output remains at zero volts. I wonder if my filter bandwidth is too tight to implement it in reality? Thanks for the 567 and CMOS 4046...
  3. Poubella

    Designing a sound detector

    Hello all! I am trying to develop an application for deaf or hearing impaired people. The point is to light a lamp when a specific sound appears (it’s a “beep” that appears when a barrier is about to close down). I measured 3675 Hz for the frequency of this beep. I cannot act directly on the...

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