Well, I don't know about him, but I'm interested.  I've been looking at R/C
for years, but never gotten anything together, paritally because of the
price per control channel.  Having a PIC send UART burst transmissions
through an RF transmitter on the unliscenssed band sounds like a great plan
to me.

If it weren't for the cost, I'd almost think that using 802.11 would be a
nifty way of controlling R/C type devices, but the interface and the base
cost would make that idea prohibitive: it's cheaper to do the same thing
with a conventional R/C controller.

--Brendan
----- Original Message -----
From: "Richard Prosser" <Richard.Prosser@ENERGY.INVENSYS.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, June 24, 2002 1:08 PM
Subject: Re: [OT]: RF Transmitter, Receiver


> Take a look at super-regenerative receivers.
> I'mthinking of  a similar project at the moment & am considering a simple
> regen circuit. The advantages are that I'm hoping to be able to use the
> same components for both TX & RX and possibly a single port pin (changed
> between an output and an input).
> "Electronics & Wireless World" had an article on superregens a month or so
> back & the circuits given appear to work OK at 70MHz or so - I've just got
> to get the right transistors for UHF operation.
>
> The disadvantage is that unless you buy a resonator to control the
> frequency it could be difficult to tune & temperature drift could be a
> problem - and with a resonator the bit rate is somewhat limited.
> If you're interested I'll try and draw a rough circuit. - Probably only
one
> or two transistors but there could be a software requirement to process
the
> received signal unless additional external components are added.
>
> Richard P

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