Comments on: SigGen1 Is Alive

By: dfowler

dfowler — Mon, 26 Nov 2007 22:56:38 +0000

syam,

I did have some trouble getting this chip to work initaly. I dont remember a specific problem other then that I had to adjust the timing in the SPI interface. I started with a build in SPI function and after hours of frustration, I did my own bit-bang version. My version worked and cured all the strange issues I was having before. I recomnd that your next step be to do a bit-bang version of the serial interface. Once things are working, then try going back to the chip SPI.

By: syam

syam — Mon, 26 Nov 2007 20:13:28 +0000

Hey, I’m working with the AD5932 myself but im a bit stumbled about programming the DDS.
I programmed a start frequency of 100kHz and increments 10times, with each increment of 100kHz steps by external increment control… HOWEVER, the actual output comes out with starting freq. of 300kHz, and steps of 300kHz! I even tried programming to other values, but the output always comes out tripled!! Did you have any problems like this?

I interface the AD5932 with a PIC16F873 using SPI, clock idle high, data on falling clock;

By: Eric

Eric — Sun, 07 Oct 2007 18:09:56 +0000

David, good seeing you and your Dad at Belton!!! On the ride back, we were looking at the kit, and one of my EE friends is interested in seeing me build it.

I will start working on this kit shortly.

By: dfowler

dfowler — Fri, 05 Oct 2007 18:07:04 +0000

Pinski,

Thank you! Send an email to me, dfowler@uchobby.com with your mailing address, we will get a board sent to you.

By: Pinski

Pinski — Fri, 05 Oct 2007 13:48:54 +0000

dfowler,

I’d love to have a play with the SigGen1 PCB, I’ve made comment about it here:
http://thefallenindustries.wordpress.com/2007/10/05/arduino-joy-part-2/

I think it would definitely be very helpful to have my own personal programmable signal generator, seeing as I’ve just started my 1st Year at University doing Electronic Engineering.

By: dfowler

dfowler — Thu, 04 Oct 2007 21:20:14 +0000

NT7S,

Yes I want to make the PCB available for sale. I would even like to make a kit with the necessary parts and posibly even offer an assembled version.

For sure I would send anyone that links to this site a free SigGen1 PCB and if you want to purchase one let me know by email. I paid about $4/each to have the boards made and would be happy to let the extra boards from this first batch go at cost. I dont think it would cost much to mail one.

If you or anyone else wants one of these boards email me at dfowler@uCHobby.com. I am thinking that $5/each will work, assuming the postage cost $1 or less. It should be easy to use PayPal for this.

By: NT7S

NT7S — Wed, 03 Oct 2007 07:56:38 +0000

This looks like a really neat project. I think this could be very useful to ham homebrewers like me. Do you have any plans to offer the PCB for sale in the future? It would be nice to be able to purchase it from someone who can buy bulk quantities instead of having to pay through the nose for a one-off board.