AD9837

Projects General Guidance
1

Hi
I'm trying to interface my Arduino uno with a AD9837 board to produce a sine wave at 200kHz but I can't seem to get it to work.

I'm using the library and the sample code in the library to test it from the following source:

This is supposed to run a frequency sweep at different shapes (square, sine, triangular) but all I get from the board is a sine wave at 500Hz. ( oscilloscope snapshot attached)
(Could it possibly be the fact that I have the chip on a breadboard instead of connections straight to Arduino?)

I have pins connected the following way:
Fsync- pin 2
Sdata- pin 11
Sclk- pin 13
Vin- 3.3V
Gnd- gnd

If anyone could tell me what I'm doing wrong or give any sort of advice that would be much appreciated.

2

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Also can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom.. :slight_smile: