Key FOB transmiting from a rotating platform

Thread Starter

KMoffett

Joined Dec 19, 2007
2,899
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
 

Thread Starter

KMoffett

Joined Dec 19, 2007
2,899
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
 

KJ6EAD

Joined Apr 30, 2011
1,569
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.
 

Thread Starter

KMoffett

Joined Dec 19, 2007
2,899
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.
That is what I was wondering. So either the FOB or the slip ring options should work.

Thanks guys.
 
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