Hi List,

About ten years ago I built a simple super-regenerative FM receiver, which 
worked remarkably well, considering that I used a single transistor and 
maybe eight passives. I was wondering if I can build a quick-and-dirty 
wireless modem based on a super-reg, a one-transistor AM transmitter, and a 
modem IC.

I have a project that requires a speed of only 1200 baud, half duplex, and a 
range of 10-15 meters. Frequency stability is a priority.

I was looking at the TCM 3105 (which is relatively expensive despite its 
age, btw), and remembered how Russel suggested a while back that one could 
use a DTMF circuit instead of a "real" modem IC. What are your thoughts on 
that? What is the highest baud rate that one can theoretically achieve with 
a DTMF chip?

Or maybe there are less expensive real modem ICs out there?

Best regards,

Vitaliy


Alison Lewis wrote:
> If you've been watching, there were some great RF
> devices suggested to me, so I put the list together
> for anyone else who may be looking for small RF
> transmitters. I went with
> http://www.rentron.com/remote_control/TXLC-315.htm.
>
>
> www.sparkfun.com
> http://www.radiotronix.com/products/prodrctas.asp
> http://www.rentron.com/remote_control/TXLC-315.htm or
> http://www.rentron.com/remote_control/TXLC-434.htm
> www.rfsolutions.co.uk

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