Making an Arduino OLED Ring Clock

I have bought a tiny OLED display, its clean and clarity draw my attention. But what can I do with it？Actually, the point is how can I show it off... Lol. Well, when I looked at the poster of The Lord of the Rings, which is my favorite movie series, I got an Idea! How about using this OLED display to make a ring clock? That sounds great, no sooner said than done.

To begin with, I need to select the power supply, clock module, and main-controller for my project.

1. 0.91”128x32 I2C OLED Display x1

2. 3.7V Lithium Battery Charger x1

3. DS3231M MEMS Precise RTC x1

4. Beetle main control x1

5. 1000mah 3.7v Lithium Battery x1

6. Needle x1

7. A piece of elastic braid tape

According to the thickness of the wrist and fingers, cutting the elastic braid tape and stitch the opening area with a needle line.

Using hot melt gun to stick previously welded parts to the telescopic ring.

And then this scuffed ring clock is done.