I am searching for an RF transmitter/Receiver IC pair for use
as a low baud rate digital wireless communication link for a home automation
device. Such an ideal IC pair would only require a few external RF
components to form a complete transmitter and receiver circuit. I
would like to stay away from premanufactured modules since they
are expensive and I would like the RF circuitry to be on the same
board as the other circuitry. My range requirements are low, since both
transmitter and receiver will be in the same room. Infrared and ultrasonic
are out due to line of site complications. I am still debating the X10
option. I would appreciate any advice or information.
Seeking career in Instrumentation and Digital System Design
San Jose, California August 1996
www.acsu.buffalo.edu/~gandler/resume.html
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> I am searching for an RF transmitter/Receiver IC pair for use
>as a low baud rate digital wireless communication link for a home automation
>device. Such an ideal IC pair would only require a few external RF
Please repost your results?! I'm also trying to figure this stuff out.
Like you said, there are
many RF model daughter-boards that take RS232 and do the rest, but they
are $$$. You'll of course have to research FCC rules. Someone here can restate
the FCC rule about power < 1mW (?), where you have unlicenced freedom with
several key constraints. DIGIKEY sells several chips in the "garage door"
opener category, which send identifying pulse trains. They aren't really
intended for data communications, but you might be able to overlay simple
messaging if time is not critical. Beyond that, you can do your own simple
FSK modulation with either a cheap-o 1200 baud modem chip, or your own PLL/VCO..
If this is for your own prototyping, you can adapt walkie-talkies as your
RF mod/demod, and even avoid FCC troubles, and use that 1-chip 1200 modem chip.
I have played a bit with the MING Rx/Tx (300,310Mhz)
meant for car alarms/door openers. Good for 1200 or
2400 baud. From Digi-Key.
**********************************************************
*Mike DeMetz SYSCON International *
*.....mikedKILLspam@spam@syscon-intl.com South Bend, IN USA *
*aka 73165.1230KILLspamcompuserve.com using Pegasus Mail *
**********************************************************
At 07:42 AM 5/20/96 -0500, you wrote:
>> I am searching for an RF transmitter/Receiver IC pair for use
>>as a low baud rate digital wireless communication link for a home automation
>>device. Such an ideal IC pair would only require a few external RF
>Please repost your results?! I'm also trying to figure this stuff out.
>
I've lost the original post for this but this may help.
I've just finished a 900MHz cordless phone design that uses the 16C57 for
the control processor. The project called for modem commands to be sent and
received. The baseband (read audio frequency) processor that I used is the
AKM2358E from Asahi Kasei. It has a compandor, scrambler, volume controls
and a MSK 2400 baud modem built in. Interface to the modem is improved over
the older 2353 with the addition of a receive buffer. It should work with
just about any radio set (including walkie talkies or key chain radios).
Unfortunately I do not know where you can obtain one but if you are
interested I can do some research.
ubvms.cc.buffalo.edu
