A wind turbine with a mechanical counter (dog?)(It's useless, I just want to record how many times the wind turbine has rotated)

※The second version incorporates a larger diameter (D151mm→D184mm) windmill with a more pronounced helical angle, enhancing wind-to-rotation conversion efficiency and facilitating smoother rotation. The D184mm windmill is recommended for low or inconsistent wind speeds, or when not mounted on a bicycle.

Initially conceived as a windmill for a child's bicycle, this project has been successfully realized.

Observe the windmill's constant rotation while the bicycle is in motion; how many revolutions does it actually complete?

Let's record it!

• I anticipate at least tens of thousands of revolutions, necessitating a five-digit counter;
• Traditional counters typically employ a reduction in the number of teeth on smaller gears to only two, sequentially engaging smaller gears to advance larger digit gears, thereby achieving a 10:1 gear ratio (or reduction ratio). The advantage of this structure is that the numerals align perfectly in the viewing window after each digit change. However, insufficient self-locking of the smaller gears might cause unintended digit movement. Conversely, excessive self-locking friction could impede rotation driven by wind power.
• Therefore, I devised a gear assembly using involute gears for smooth transmission;
• To achieve a 10:1 transmission ratio without excessive gear size disparity, I designed a 1:3:10 ratio, resulting in a tenfold difference between adjacent digits. To ensure parallel alignment of the two gear shafts, an 8-tooth gear meshes with a 24-tooth gear (3:1 ratio, module 1.3), and a 6-tooth gear meshes with a 20-tooth gear (10:3 ratio, module 1.6). This approach simultaneously attains the desired gear ratio and maintains shaft parallelism [(8+24)*1.3=(6+20)*1.6];
• The base incorporates a dovetail groove for secure attachment to compatible surfaces, and four detachable legs enable independent wind-powered operation.

In closing, it somewhat resembles a dog—a goofy dog