[time-nuts] Simple open source microcontroller solution to tune DDS needed

[Bob Darby]

Rick,

It might be an adventure but ebay - doukstore  has a AD9959 Radio Frequency RF Signal Source Generator 4-Channel DDS Module DC5V for 50.99 and a DDS Module Driver Board LCD for AD9854 / AD9954 / AD9833 / AD9834 / AD9851 control board at 27.99 with push buttons and a LCD screen to set the outputs.  They also have a number of other DDS modules.

I have no idea what the quality is and I doubt there are English manuals or any schematics but for 78 bucks delivered it might suit.  

Bob Darby

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Richard (Rick) Karlquist
Sent: Wednesday, December 13, 2017 3:03 PM
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Subject: [time-nuts] Simple open source microcontroller solution to tune DDS needed

I need a very simple controller to tune a DDS with up/down switches (imagine setting the time on a clock).  A DDS chip, such as an AD9836 would go on a PC board and a couple of pushbuttons would tell the controller to tune up or down.

Before reinventing this wheel, I thought I would see if anyone knows of a similar solution that can be leveraged.
What I would like is both hardware and software, where the software could be edited to accommodate the up/down buttons.  A last resort would be to write software from scratch.  My software skills are extremely limited.
Cutting and pasting code might work for me.

I need to be able to embed this onto an existing PC board.
I can't use a preexisting "daughter" card, other than to copy the design of the card.

Rick Karlquist
N6RK



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