Micro scale radio transceiver for a sensor network demo

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For a Micro scale radio transceiver for a sensor network demonstration,
roI'm looking for a very small and light weight radio tranceivers capable of
transmitting and receiving digital data within 3 meters radius.

Followings are desired specifications;
    Weight : Less than 5 grams (including battery, probably a tiny watch
battery)
    Size     : as small as possible
    Operation life time : 5 hours operation with a new battery
    Bit rate : 9600 baud (or faster)
    Communication range : 3 meters
    Capable of operating in the presence of multiple other active
transceivers of the same kind within 3 meters. This effectively means that
multiple transceiver can simulataneously communicate with each other and/or
a host. (It is acceptable if transceivers required to be  programmed to have
unique addresses prior to experiments.)
    Capable of operating on a moving platform (including on a human or
animal)


Any suggestion will be highly appreciated.

Regards,

Gustav Gorev



Re: Micro scale radio transceiver for a sensor network demo



"Gustav Gorev" <gg> wrote in message
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of
and/or
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have


The new range of microprocessors from microchip would be perfect for you.
They integrate a UHF transceiver and are as small as you will find.
rfPIC12F625H or similar
Won't break the bank too. AU$3.86 from Futurlec.com.au

What are you building?



Re: Micro scale radio transceiver for a sensor network demo



"Gustav Gorev" <gg> wrote in message
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Only 5 hours ?
nordic rf240x  chip
http://www.sparkfun.com/datasheets/IC/nRF2401A.pdf
http://www.sparkfun.com/shop/index.php?shop=1&cart42%9930&cat79%&

Sparkfun.com sells some little modules with these chips.

If you want to have multiple transceivers talking with each
other thats going to get very tricky and expensive quickly.

Good chance you are going to have to implement a protocol
on top the base chip.
Something like can bus  that can handle multiple transcievers.
Ther nordic rf2401 can handle 2 recieve channels(8 MHz apart)

Problem is a lot of chips like this are designed to be paired.



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