AVR-Chat

On Tue, 29 Mar 2005, Ralph Hilton wrote:

> On Mon, 28 Mar 2005 18:08:20 -0000 you wrote:
> 
> >Hi,
> >   There are groups for AVR and ATMega which I would like to share
> >with all.
> >
> >http://groups.yahoo.com/group/AVR_Microcontroller
> >http://groups.yahoo.com/group/ATMega_Microcontroller
> 
> Too many groups get to be a pain!
> --
> Ralph Hilton

Yes, that's for sure.  I recall when I started using AVR's I looked for 
groups on Yahoogroups and came up with half a dozen or so.  I picked a 
couple and joined them.  I eventually ended up on this group, which is the 
only one with much activity.

There is another one, AVR-DEV, set up by Diz W8DIZ of Parts and Kits 
(http://www.partsandkits.com).  He has been trying to develop a ham radio 
transceiver called the MultiPIG with an AVR controlling an AD9850 DSP 
chip.  

The last I heard from Diz, he had all but given up on the AD9850 for 
wide-frequency use because the unwanted spurs on the output were causing 
all sorts of intermod and noise floor problems and he wasn't getting the 
desired result.  

I've used the AD9850 in a very narrow-band receiver with a narrow filter 
on the output (500 kHz wide at 12 MHz) and it seemed to do a lot better, 
but if you're trying to use the 9850 as the LO for the entire shortwave 
spectrum this becomes a big problem.

So I haven't seen a posting to that group in months, either.

This is the best AVR group as far as I'm concerened.

Zack W9SZ