I want to send data wirelessly up to 30cm (12in) to a PIC chip.

I will not have a line of sight so it cant be Infra Red.



The emitter needs to be small and needs to run on very little power and will only be powered when it needs to transmit. (this will be a 10us pulse, up to 50 times per second)

I am only sending 1 or 0. (either transmitting, or not) and it is the leading edge which I am using as the signal.

I need to be able to run several of these systems in tandem without them interfearing with eachother.

I am not sure what kind of technology to use,

would ultrasonics be suitable?
Radio?
Or one of the newer technologies like bluetooth?


I would really appreciate Pros and Cons of these technologies, or if there is another which is suitable please mention that.

If anyone has any good websites on the subject I would be very grateful.

Many thanks in advance
John

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The first rule of mstechca club is do not talk about mstechca club.
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a 433mhz rf transmitter will do the job

http://store.qkits.com/moreinfo.cfm/RX433 recivor

http://store.qkits.com/moreinfo.cfm/tX433 transmitter

 

Here's the problem with that:

Otherwise I would have recommended the Linx modules.

j.

 

Is there some kind of system I could use to keep the signals from interfearing.

Eg every emitter is given a unique ID, then the reciever is tuned to that emitter.
Since I am interested in the leading edge then the emitter need only transmit its own ID.


I have no clue how to do this as I have never used wireless before.
Is this possible?
Anyone got any tips on how I can get this to work?

Cheers

__________________
The first rule of mstechca club is do not talk about mstechca club.
http://www.electro-tech-online.com/s...induser&u=1245

 

I can't make any sense of what you are trying to do - try telling us what your project is, rather than your idea of how it needs to work (which may not be the best way).

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