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Thread: Reading current frequency and amplitude from motor phase to convert to audio signal

              
   
   
  1. #11
    Senior Member Hugues's Avatar
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    Just realized the frequencies i measured in attached pictures above (250 Hz to 20 kHz) are in the audible range:
    https://www.google.ch/webhp?sourceid...nge+for+humans

    Next week-end i'll try to simply record the signal with my phone and play it back, just to hear what a motor sounds like. Don't know if the amplitude will be enough, but can surely find an app to boost this.

    Maybe i don't need any advanced system like Arduino/Rasp PI to turn this signal into some kind of interesting audible feed-back, maybe a good old analog circuit with filters can do the job.
    Regards from Switzerland
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  2. #12
    Senior Member Hugues's Avatar
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    Quote Originally Posted by Hugues View Post
    Just realized the frequencies i measured in attached pictures above (250 Hz to 20 kHz) are in the audible range:
    https://www.google.ch/webhp?sourceid...nge+for+humans

    Next week-end i'll try to simply record the signal with my phone and play it back, just to hear what a motor sounds like. Don't know if the amplitude will be enough, but can surely find an app to boost this.

    Maybe i don't need any advanced system like Arduino/Rasp PI to turn this signal into some kind of interesting audible feed-back, maybe a good old analog circuit with filters can do the job.
    It is indeed in the audible range in frequency and amplitude

    So i've recorded it with a simple recorder app on my phone and played it back, sounds cool, clearly too much background noise, but that shouldn't be a big problem to remove that noise.

    You can download the .mp3 file here:
    https://drive.google.com/open?id=0Bw...GVYV0tuMk9MTTQ

    Try to play it on a speaker with good bass, sounds better.

    I was just throttling at low speed, wheel off the ground.

    Please let me know your impressions.

    Next step: try to clean and "sculpt" the sound in an audio app, keeping in mind that all this will have to be done in real time ultimately
    Last edited by Hugues; 27 January 2017 at 1042.
    Regards from Switzerland
    My 2.5 Upgrade Thread

  3. #13
    Senior Member SplinterOz's Avatar
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    I like that sound and honestly don't mind the noise too much. I can see a little kit on sale shortly
    SplinterOz
    From Australia'a Capital
    http://rgelectric.wordpress.com/

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