Recent content by kerrick

  1. K

    How to determine the loudness of a sound

    vk6kro and Averagesupernova, thanks, I think I will be able to find what I need among your links. I should perhaps explain more thoroughly what I'm trying to do: I have a sound that has distinct "beats" (more of a rise and fall in loudness than a sharp tapping), and I want to actuate a motor in...
  2. K

    Help calculating power required to drive shaft

    The problem seems tricky. How I would do it is: -Note that you need to find the integral of force with respect to distance the wedge has been lifted as you draw the wedge out of the water -Force is equal to weight of the block - weight of water displaced. You can determine the weight of the...
  3. K

    Question about magnetism/induced emf in small coil

    Since the current in the solenoid is switched off, it no longer produces a magnetic field. So the flux changes to 0 over the course of 25 ms.
  4. K

    How to determine the loudness of a sound

    I need a sensor or sensor circuit that can determine the approximate loudness of a sound (which is in the range 30-80 dB). However, I cannot find any parts, schematics, or other helpful documentation on the internet. I have a microphone and AVR microcontrollers immediately available, so if...
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