recommand me a tachometer

Discussion in 'The Projects Forum' started by Swashia, Dec 16, 2012.

  1. Swashia

    Thread Starter New Member

    Nov 24, 2012
    4
    0
    hi
    so basically I need a tachometer sensor that can read the RPM of the small scale wind turbine generator. The tachometer must output RPM as digital signal, which in turn enter the microcontroller for data analysis. Does this kind of tachometer exist? or do i have to build one? as described on this site
    http://www.pyroelectro.com/tutorials/digital_tachometer_rpm/index.html

    Edit*
    I also read about people building tachometer using bicycle-speedometer. Is possible to feed output of speedmeter into the microcontroller?

    http://www.instructables.com/id/Tachometer-made-from-a-bicycle-speedometer-cycloc/
     
    Last edited: Dec 16, 2012
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    I would use a slotted opto coupler, or hall effect sensor, and feed the pulses into your micro,and count the pulses per revolution.
     
  3. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    5,435
    1,305
    What type of generator does your turbine use? If it has an AC output and rectifier you can get a tach pulse from one of the AC windings (before the rectifier).
     
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