This page illustrates an Arduino Controlled DDS VFO project for HF Band operation of a Direct Conversion CW Transceiver. The “Tx VFO” is on the dial frequency, while the “Rx VFO” is 600Hz low.
It is left the constructional efforts of the radio ham to build the overall design, a degree of instructions are found in the pdf document Arduino Uno DDS VFO pdf article.
The Arduino Uno DDS software for the project is used with the radio ham licence, and may be modified by the operator of the radio ham licence for their individual private needs.
Arduino Uno controlled AD9850 DDS VFO for VLF 136KHz to 10m band. By Alastair GW0AJU