Quad Watch Winder

This watch winder is inspired by this thing: https://www.thingiverse.com/thing:2021221
Thank you Simone Dassi!
I adopted the shape of watch holder and plug. I modelled all parts in Fusion 360 from scratch.

ATMEGA is programmed like "Arduino on breadboard" as seen here:
https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard - the minimal version without external clock, running on 8 MHz.

I put everything on a piece of prototype PCB. I desoldered all the pins from motor drivers and soldere