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MICREL wireless chips, 300 mhz AM only and you only need a ceramic resonator and a few outboard parts-they are cheap, use low power and run at 3 Vcc. They are made for data transmission up to 300 feet.
A simple RF Transmitter for digital data
PIC Microcontoller RF I/O Methods
Cybiko Wireless PDA / Game : A complete RF data design / platform for pennies
Pagers@ Cellular@ WirelessLANs@ GPS@
Books:


Secrets of Rf Circuit Design by Joseph J. Carr
See also:
David A Cary of Motorguide Pinpoint Says: " general circuit design " +
| file: /techref/io/rfs.htm, 5KB, , updated: 2008/6/13 11:41, local time: 2008/7/5 12:16,
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