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DDS Signal Generator (Function Generator)

Article Written By Anonymous     Posted Date 07-06-2014
Project: DDS Signal Generator (Function Generator) based on the AD9850
Here’s a proposal for a group project. We could post here to exchange ideas, ask questions, and post our progress. Not everyone needs to build the same thing, e.g. you may use a 4 by 3/4 keyboard or a rotary encoder.in your design..
Why make a DDS Function Generator based on the AD9850:
If you have a CRO then you will need a Function Generator to make the most of your CRO.

And you should be able to make one, as good if not better than a commercial one, for less than a bought one.

The AD9850 module costs less than the chip (AD9850), about $9 on ebay for the module.

You can find code on the net eg:
http://nr8o.dhlpilotcentral.com/?p=83
http://www.ad7c.com/projects/ad9850-dds-vfo/
https://code.google.com/p/ad9850-arduino/
http://webshed.org/wiki/AD9850_Arduino
http://www.elecfreaks.com/2110.html

To start with you will need at lest the following:
1 or 2 AD9850 modules (we may need to modify this board) eg.
http://www.ebay.com/itm/AD9850-DDS-Signal-Generator-Module-0-40MHz-Test-Equipment-/140776695890
1 solderless breadboard and Some wires to connect your Arduino to the module eg.
http://www.icstation.com/product_info.php?products_id=3281
1 Arduino (Uno or Mega) eg.
http://www.icstation.com/product_info.php?products_id=3517

Regards

Geoff