DigiVFO is a miniature but highly functional VFO using the MS5351M synthesized clock generator, and is based on the ProgRock2 module already produced by QRP Labs. Different firmware, and the addition of a standard rotary encoder and 0.91” I2C OLED module, facilitate the DigiVFO: A feature-rich VFO with BFO and CAT control USB interface.

Kit features:

• Tiny size PCB, a little smaller than an HC6 crystal: 0.725 x 0.675 inches (18.4 x 17.1mm)
• Factory assembled PCB, ready-to-use: assembly is just connection of the rotary encoder and OLED module.
• 0.25ppm TCXO reference as standard; typical drift and accuracy will be less than 1Hz at 40m band, for example.
• Output frequency range is configured to cover 1.000000 MHz to 99.999999 MHz.
• Supports direct conversion receivers, including with 90-degree quadrature phase LO
• Supports superhet with low-side or high-side LO injection
• For superhet radios, also generates the BFO with configurable frequency
• Configurable CW receive offset (CW or CW-R), if you ground an input pin to indicate you are in CW mode
• RIT (Receive Incremental Tuning)
• VFO A / B / Split mode
• CAT control interface via built-in USB to Virtual COM Serial port (micro-USB connector)
• CAT via separate USART port for 3.3V logic level serial (e.g. other microcontroller)
• QRP Labs Firmware Update (QFU) bootloader for firmware updates

​Printed instructions are not supplied with the kit. For more details of this kit, and to download the assembly/operating manuals, please visit the DigiVFO page by clicking here.

OPTIONS:

1) A knob can be added as an option. Or use your own knob suitable for 1/4-inch D-shaft.

2) A USB A-Micro cable is available, which is tested and will work with the module

3) 2x6-pin headers can be connected to the edge-connections on each side of the board (see photo); that can be used for connecting other cables or dupont cables etc. 

4) 2x6-right-angled pin header: the type of pin header that has a 90-degree bend; if you install one of these 2x6-pin headers on each connector edge of the board, you will then have a sort of IC type of thing with 4 rows of 6-pins for all the connections, and can install this like an IC in a project of your own.