How i made my digital radio

This is my simple one-button radio. One button to turn it on and change the volume. There are actually two buttons more: first to select a new channel and second one to save it to memory.

It was a project that taught me how to draw PCBs, what are Gerber files and so on. I designed 4 different layouts, orders two. The first one had some noise problems. So I added some filters and ordered the second one.

It works and I am happy with it mostly. I do not have any education in electronics, so forgive me if it does not meet professional standards.

It is now my second stop motion animation. It took about a week to do. It could be better if I put more time into it.

Schematics

It uses Arduino Nano as the main control unit.

Code