I've made a circuit with AD9850 Controlled by ATMega328P-AU with serial interface.
Here is the Schematic Link.
I've Tested Prog with AD9850 Module (HC-SR08_Module) and code is working.
Circuit use a 3.7v Single Cell Li-Po Battery and MT3608 to Boost 3.7v to 5v.
The Reference Oscillator for ad9850 is 2 MHz .
I've Reduce the code to just set the frequency of ad9850 But it generates few fixed random frequencies .
Desire Freq ----> Output Freq
1 KHz ----> 900 KHz
2 KHz ----> 3.9 KHz
3 KHz ----> 15Hz
4 KHz ----> below 2Hz
5 KHz ----> 899 KHz
and so on.....
every time i change frequency , the output frequency is a random value between above.
I would appreciate any help.
Can you share the frequency tuning word you used for each desired frequency?