Radio Frequency IO

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

Manchester encoding.

PIC Microcontoller RF I/O Methods

Cybiko Wireless PDA / Game : A complete RF data design / platform for pennies

Pagers@ Cellular@ WirelessLANs@ GPS@

Books:

• 
  Radio Handbook (23rd Ed, Reprint) by William I. Orr
• 
  Rf Circuit Design by Christopher Bowick
• Secrets of Rf Circuit Design by Joseph J. Carr
• The Radio Amateur Antenna Handbook
• The Arrl Handbook for Radio Amateurs...

See also:

• radiometrix.co.uk has 433 MHz transceivers
• RF Modulation Inc.
• http://www.redsword.com/tjacobs/geeb/fmcard.htm Hacking an ISA FM Radio card to tune 50Mhz to 160Mhz
• http://bigbang.vtc.vsc.edu/fmradio/
• http://sm0vpo.8m.com/index.htm Homebuilt circuits and PCBs for RX, TX, power, building blocks, etc...
• ../microchip/rftxcw.htm CW RF TX useing an 8 pin PIC, crystal oscillator generate variable width pulses
• www.abacom-tech.com Ming's RF xmitter/recievers distributed by Abacom Technologies
• • AM Tx and RX (<$12) upto 250ft at about 4kbits/s
  • FM Transceiver ($90) 500ft 40kbs
• http://www.convergentinc.com - AM Tx and Rx (<$10)
• http://www.lemosint.com - FM Tx and Rx (<$30) upto about 200m at low ?4kbs? - (<$40) upto 300m at about 40kbits/sec
• http://www.wirelessmountain.com/unilink.html
• http://www.linxtechnologies.com/f_modules.html
• 60Hz hum:
  • 60Hz hum is either radiated and picked up by antennas or possibly being brought in on the power cord and must be filtered out in thereceiver. See: http://www.wolfenet.com/~kiwa/rxtips.html
• Antennas
  • http://www.arrowweb.com/M1/otr/antenna.html
• http://www.markworld.com/hamtools.html a tiny PIC16C54 based CW beacon and other Ham stuff
• http://bipt106.bi.ehu.es/psk31.html
• http://www.linxtechnologies.com
• http://www.tapr.org

microwave PWB layout tips +

general circuit design +

David A Cary of Motorguide Pinpoint Says: " general circuit design " +

Low power RF links +

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