How to Build and Code an Arduino VFO Si5351 PART-3

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/1sTjh...

VFO Schematic Download
https://drive.google.com/file/d/17vSC...

VFO Breadboard Layout Download
https://drive.google.com/file/d/1yMqR...

Arduino Sketch Download
https://drive.google.com/file/d/1LlNt...

Arduino NANO Clone Link
https://s.click.aliexpress.com/e/_Dm8...

SI5153 Breakout Board
https://s.click.aliexpress.com/e/_DeH...

OLED Display I2C
https://s.click.aliexpress.com/e/_Dn3...

Rotary Encoder 100PPR
https://s.click.aliexpress.com/e/_DBH...

AD831 Mixer
https://s.click.aliexpress.com/e/_DBN...

8 Digit Seven Segment Display MAX7219
https://s.click.aliexpress.com/e/_DBS...

SMA RG316 cables
https://s.click.aliexpress.com/e/_Dl0...

10dB SMA Attenuator
https://s.click.aliexpress.com/e/_DlH...