My favourite electronics distributor "AZ-delivery" has a blog where they posted a manual to create a "Solar Tracker" out of plywood. I asked the creator for a sketch so I can create STL for a 3D printer. He did me the favour and here we go. Yes, there are already plenty of Solar Tracker designs on thingiverse, so what. Now it is one more.

Video on YT: https://www.youtube.com/watch?v=tIO304yINBw

To find schematics and sourcecode for Arduino, just visit the (german) blog page: https://www.az-delivery.de/blogs/azdelivery-blog-fur-arduino-und-raspberry-pi/solar-tracker-mit-schrittmotoren-und-oled-display

You can find a part list there, too.

My device is a bit different. I used a Wemos D1 R32 board, which is pin-compatible to UNO boards, but offers much more power, PINs, WLAN/Bluetooth and much more. I used a breadboard instead of a perfboard. I hate working with perfboards, I'd rather drown the breadboard in hot glue. Only alternative for me is making a real PCB, which looks a bit too much work for this toy.

Code, 3D STL-Files, KiCad schematics, pictures and a video can be found on my GitHub: https://github.com/Pontifex42/SolarTracker

These files are for free, but I please you to add a photo here if you make a copy. Thank you.