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Has anyone converted a 27mhz remote controller to 49mhz or vice versa? Answered

You know how everyone keeps losing remotes for the great toys they sell at garage sales and such? It would be neat to be able to control different frequency toys from one controller?

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verence (author)2011-03-27

Tricky.

The problem is not only in modifying the transmission frequency from 27MHz to 49MHz (that might be doable with studying the circuit and changing a lot of parts and probably even modifying the board - thin printed antennas etc.), but the frequency is just the carrier of the actual control signal.

The modulation / timing / coding of the control signal will be different for each kind of toy. Although there is a kind of standard for RC controlled kits (model-cars, -planes, -boats) but even here there are variations between the manufacturers.

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farmboy177 (author)verence2011-03-29

Hi verence, thanks for your answer. I wondered if there was an existing standard to toy r/c controllers. I guess it would take quite a bit of experimenting and patience to come up with a hack, and then it would only work for toys from the same manufacturer.

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verence (author)farmboy1772011-03-29

> I guess it would take quite a bit of experimenting and patience to come up with a hack,

Lot of time and some good equipment (oscilloscope, spectrum analyser...)

> and then it would only work for toys from the same manufacturer.
Most probably not even then. If they are in the mass market, they might use a different IC / controller for every kind of product. If they can save a single cent per part and build a million pieces, that adds up...

But if you want to invest the time, go for it (and make an Instructable out of it). If nothing else, you will get a deep understanding of RC circuits.

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rickharris (author)2011-03-27

Not o easy as it may seem many components are frequency dependent.

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steveastrouk (author)rickharris2011-03-27

+1 Its not just changing crystals.

Steve

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