BASIC Tech Group - MyNews 19 - Simple VFO varicap tuned

I recently did the course for the Intermediate Amateur Radio exam. Part of this course is to build a small piece of electronics, another part of the course is to calibrate a VFO. This teaches the understanding of not transmitting outside the Band edges.

I grabbed the opportunity to build a simple VFO, and because I am deep into Arduino designs I decided to design a varicap tuned VFO for 40m constructed on an Arduino Shield. Here's the schematic and PCB layout.





This is the finished board



Showing the output on a frequency meter, at around 6.9MHz. The tuning range, without adjusting the coil, is 6.9-7,5MHz.