Comments on: AD7C DDS VFO Update

By: admin

admin — Fri, 18 Aug 2017 15:10:31 +0000

Make sure you are using the IF version. The RIT is built in already.

By: Curt K8AI

Curt K8AI — Fri, 18 Aug 2017 12:17:43 +0000

James, I’m working on doing the same thing. I have the VFO tuning from 5 to 5.5 MHz so far but I’m trying to figure out the code to make the frequency offset for RIT. An adjustable voltage on one of the A/D pins out to do it, I’d think.

By: admin

admin — Fri, 11 Nov 2016 02:53:46 +0000

Yes. You have to modify the code. Look on this blog and you’ll find a few posts that reference what you’ll need!
Rich

By: Clyde Zimbelman

Clyde Zimbelman — Fri, 11 Nov 2016 02:02:31 +0000

I have built one with the uno. I am interested in reducing size and using a nano or or mini. Is the code the same or are there changes necessary.

By: admin

admin — Mon, 08 Aug 2016 17:29:19 +0000

Just adjust the divisor for the clock frequency. It’s well commented below in these comments.

By: hamid ep4hr

hamid ep4hr — Sat, 06 Aug 2016 17:28:01 +0000

If I use AD9851 which code must be change ?
Best regards Hamid ,EP4HR

By: Joel KB6QVI

Joel KB6QVI — Thu, 27 Aug 2015 00:23:39 +0000

Rich,

Thanks so much for creating this project. I have learned a lot about Arduino and all the small versions as well. I have built three of these VFOs, 1 for a RF signal generator and 1 for a DSB transceiver I designed, and 1 for my Austrailian MST V1 transceiver which you can see on my QRZ page, all work perfectly. http://www.qrz.com/db/KB6QVI
The Chinese are on to us though, and have been steadily raising the prices of the DDS modules, but still a deal at $10 U.S. I guess. Thanks again.
Joel KB6QVI

By: James Pesavento kq4ri

James Pesavento kq4ri — Wed, 22 Jul 2015 03:19:09 +0000

cool project- thanks for the code. My project is still on the breadboard. I have an old Tentec Omni D that has a pto I hope to replace with an external dds vfo. I want the vfo to cover 5 – 5.5 mhz and the display to show the actual transmit freq. Good thing I am retired cause it might take considerable time to get it right.. I know others have already done this But the best thing is you have enough code to use it out of the box.Thanks again
Jim

By: john AD5YE

john AD5YE — Wed, 17 Jun 2015 08:01:51 +0000

Regarding the “rotary.h not found” error, the problem is not actually with importing the library.

The library defines the file as “Rotary.h”. The code includes the line “rotary.h”.

The solution is is simple: capitalize the “R”. Then the code compiles nicely.

Hope this helps.

john AD5YE