Selector

customize it for your needs in size, numbers and labels. 

Example 3D file is a sugar countdown counter per day (max 30g) and a 24h counter for time.

But you can use this to indicate emotions or for games as a lifecounter. To remember if you already feed your pet or took your pills . Or use 2 as a calendar (month, day). For Ratings or to indicate processing steps or whos turn it is to clean.

The Arrow can be turned by holding from both sides or with a coin. A ratchet ensures it will not shift by itself.

Print the last layers with a different color to make it more readable.