In this series of videos I go though how to build a VFO based on the Arduino platform using the SI5351. The VFO includes IF offsets, frequency displays and a high speed rotary encoder. The VFO can be used for making home brew radio projects, tuning many types of radio equipment including SDR receivers. This VFO has good performance and is relatively cheap to build. No programming skills are required and I will supply the code for the project and go through how to configure and upload it. In the video I go through how the circuits work and cover troubleshooting to get the VFO working.
Part 3
In this video we look at a new PCB for the project, take a look at future options and look at mode sensing for LO frequency shifting.
Rev 2 of the code will be available to download in part 4
The details of how to get the PCB used in this video will also be available in part 4.
Downloads
Band Surfer VFO Schematic Download
https://drive.google.com/file/d/1sTjhuXY6fzZJOwcZ1PvBnuSoPbNe9Udh/view?usp=sharing
VFO Schematic Download
https://drive.google.com/file/d/17vSC30NaMvQ9P45yLsstwSfPRhfKRcq2/view?usp=sharing
VFO Breadboard Layout Download
https://drive.google.com/file/d/1yMqRvYWVON6iLySQe6EmZ7wwwMtsA_gh/view?usp=sharing
Arduino Sketch Download
https://drive.google.com/file/d/1LlNtaqS5noR1IFS4LyZl9YSHui68dolV/view?usp=sharing
Arduino NANO Clone Link
https://s.click.aliexpress.com/e/_Dm8Iyjb
SI5153 Breakout Board
https://s.click.aliexpress.com/e/_DeHxOXx
OLED Display I2C
https://s.click.aliexpress.com/e/_Dn3ekgl
Rotary Encoder 100PPR
https://s.click.aliexpress.com/e/_DBHWhsD
AD831 Mixer
https://s.click.aliexpress.com/e/_DBN1b0Z
8 Digit Seven Segment Display MAX7219
https://s.click.aliexpress.com/e/_DBSo57R
SMA RG316 cables
https://s.click.aliexpress.com/e/_Dl0oEFF
10dB SMA Attenuator
https://s.click.aliexpress.com/e/_DlHLNgp