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
Low power
RF links +e.g. LoRaWan
Bluetooth@ Pagers@
Cellular@ WirelessLANs@
GPS@
Books:
See also:
-
http://lowpowerlab.com/shop/index.php?route=product/product&product_id=50
Moteino is a low cost wireless Arduino clone based on the Atmel ATMega328P
microcontroller: Low cost Arduino clone fully compatible with the Arduino
IDE, Open source,
github.com/LowPowerLab Designed
with low power battery operation in mind, 3.3V onboard regulator (MCP1702)
provides up to 250mA, input up to 13.2V, The regular version includes an
onboard RFM12B transceiver and wire antenna+
-
http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter
Using an internal clock divider to make the carrier and "Modulation is done
by adjusting the frequency using the fractional divider between 100.025Mhz
and 99.975Mhz, which makes the audio signal. The fractional divider doesn't
have enough resolution to produce more than ~6 bit audio, but since the PI
is very fast, we can do oversampling to provide about 9.5 bit audio by using
128 subsamples per real audio sample."+
-
http://www.rfdigital.com pre-certified
2.4GHz modules with support for several uC's.
-
http://www.zen22142.zen.co.uk/Circuits/rf/sfsm.htm
Ultra simple RF Field strength probe
-
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:
-
Antennas
-
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 " +
Archive:
+
file: /Techref/io/rfs.htm, 7KB, , updated: 2018/7/26 18:43, local time: 2024/8/14 14:17,
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