Remote control by radio

peranders · 20th September 2005, 08:05 AM

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?

darkfenriz · 20th September 2005, 09:15 AM

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.

TwoSpoons · 21st September 2005, 02:50 AM

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.

20th September 2005, 08:05 AM	#1
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	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? __________________ /Per-Anders (my first name) or P-A as my friends call me

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20th September 2005, 09:15 AM	#2
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	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.

21st September 2005, 02:50 AM	#3
TwoSpoons diyAudio Member Join Date: Oct 2004	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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