Key FOB transmiting from a rotating platform

Discussion in 'The Projects Forum' started by KMoffett, Jan 4, 2016.

  1. KMoffett

    Thread Starter AAC Fanatic!

    Dec 19, 2007
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    I would like to send the state of three switches on a rotating platform to a nearby stationary circuit. The platform would rotate from 15 to 200 RPM. I'm wondering if anyone has done this using a multi-button key FOB transmitter on a rotating device, sending to a stationary receiver. Only one switch would be active at any given moment.

    Ken
     
  2. Lestraveled

    Well-Known Member

    May 19, 2014
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  3. KMoffett

    Thread Starter AAC Fanatic!

    Dec 19, 2007
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    Thanks. That looks like it may be the best solution, at that price. But I would still like to know if a rotating FOB transmitter might work.

    Ken
     
  4. Lestraveled

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  5. KJ6EAD

    Senior Member

    Apr 30, 2011
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    Of course the fob will work as long as the range limits are respected. At a few hundred MHz and close range, the antenna orientation and doppler shift will be insignificant.
     
  6. Brevor

    Active Member

    Apr 9, 2011
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    The tire pressure sensors on cars work that way.
     
  7. KMoffett

    Thread Starter AAC Fanatic!

    Dec 19, 2007
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    That is what I was wondering. So either the FOB or the slip ring options should work.

    Thanks guys.
     
    Last edited: Jan 5, 2016
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