Here's my finished clock. Thought I would do this one in PETG. Turned out nice. I did make a couple changes. Modded the hands from the smaller version since I like them better. I also modded the slip clutch gears so they had a full flat surface on each one. PETG is slippery and this helped a lot. If you use the listed OSOYOO Arduino Nano boards don't forget to load the OSOYOO Board files. I programmed the board, it ran super slow. I then realized these require there own files listed here https://osoyoo.com/2022/08/11/arduino-hardware-support-package-for-lgt-nano/ I also put a piece of tape over the LEDs on the Nano because they were making a light show through the PETG case. All good after that...
Interesting. I wonder if the OSOYOO boards default to an ultra low power mode running at a low clock rate. Glad you found a solution and posted about it.
Looks great. I like the red white and blue theme. Thanks for posting pictures.
I don't understand the reasons for the OSOYOO board files. It is good to mentioned it in case it helps others. All my boards have run properly with only an occasional switch between the old or new bootloader.
The solid surface in the friction clutch was removed since the gears are much more exposed in this clock compared to the smaller version. It was replaced by a simple ring that allows you to see through the gears. Both methods work. I am currently experimenting with a new gear profile where the rubbing surface was made even smaller to avoid blocking the view. Only a small circle in the center is touching. I don't really want to add a solid plate on these gears.