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Old 20th September 2005, 08:05 AM   #1
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Default Remote control by radio

This is the problem:

I'm going to make a remote control for automotive which I want to be good worldwide. Slow dataspeed, it's just wireless pushbuttons.

Is there any frequency that will work worldwide, 2.4 GHz, 433, 868, 923 MHz? Suitable IC's?

Atmel, Chipcom and Nordic have, any more good alternatives?
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Old 20th September 2005, 09:15 AM   #2
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2.4GHz should be free to use all over the world. Apart from WiFi and so on this band is too close to microwave oven frequency to be used for any commertial/military purposes.
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Old 21st September 2005, 02:50 AM   #3
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Micrel, Microchip (Keeloq series), and Hitachi for chips. 305 MHz is also common.

There are also lots of unbelievably cheap transmitters and receivers available from China. The ones I was using were US 50c for a SAW transmitter, and $US 2 for a receiver. (at 305MHz).

You have access to an RF spectrum analyser, I hope. You're going to need one to get the antenna working.
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