[ARC5] 9850 DDS

[Bob Macklin]

Here is a PCB almost ready to use. You just have to assemble it:
http://www.pongrance.com/DDS-9850.html

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "Howie DeFelice" <howied231 at hotmail.com>
To: <arc5 at mailman.qth.net>
Sent: Thursday, March 21, 2013 9:44 AM
Subject: [ARC5] 9850 DDS


> Dave,
>
> What a great find. There was an article in this months QEX that explains 
> using this very chip.  There are a few ways to get the freq info into the 
> chip. A few are:
>
> 1. use the parallel port of a PC with a few protection diodes and 
> resistors along with a program to spit the correct data out the port.
>
> 2. load the data into a small prom, eprom, etc. and use a counter to load 
> the data words in
>
> 3. program a PIC or AVR to load the data words. This would probably be the 
> easiest to do. You could use a PICAXE chip which comes with a BASIC 
> interpreter built in. The only thing required is a PC with a serial port. 
> Use could also use one of many versions of the Atmel AVR along with a free 
> compiled basic from MCS Electronics. All you need is a PC with a parallel 
> port to program the chip. I have used both of these with great success. 
> The nice thing about the Atmel AVR/MCS software approach is that the parts 
> are dirt cheap and available everywhere( Digikey, Mouser).  The PICAXE is 
> available from Sparkfun. Both versions of BASIC are very easy to use and 
> have many built in functions that make programming easy. I am NOT a 
> programmer or do I pretend to be one but even I can say that these devices 
> are easy to use.
>
>
> Howie AB2S
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