After model optimization:
1. The fixed position of the ESC is widened to facilitate installation and wiring. The left side of the original position is too small and will easily fall out;
2. The wiring positions at the upper and lower ends of the battery are enlarged, making it easier to install. The battery needs to be welded. The previous version was too small, making it difficult to install after welding;
3. Optimized the shell pattern;
4. Optimize the motor back cover to solve the problem that some motors will grind the cover;
5. Optimize the magnetic fit of the front air nozzle and prevent the magnet from falling;
Updated on 2024.02.21

BOM list, I hope everyone can make their own violent fan at low cost

Motor: 29mm diameter brushless motor

Battery 2*18650

Magnet round 4*3

Switch patch self-locking KAN-10A

Screw m2*6 (recommended m1.8*6)

Straight slide potentiometer 10K(B103)

High current mos electronic switch

2-3S lithium battery charging module

ESC 2-3S 30A ESC

I don’t know how to buy components, so I can compare them according to the wiring diagram below.

The model modification comes from Bilibili and can be dismantled and played with.

The wiring diagram and tutorial are shown below: