29MM High-Velocity Fan, Low Cost

Many thanks to author Jinhun for sharing the 40MM high-impact fan housing. I have miniaturized it and redesigned the logo, incorporating a 2S battery to reduce costs. This is the perfect choice for outdoor cooling on those hot summer days. The speed control knob may require gentle heating with a lighter for insertion. The speed controller is secured to the back with hot glue. The bottom voltage display utilizes a 0.28 voltage meter (two-wire) and a 1208YD flashlight switch, directly connected to the battery's positive and negative terminals. A 12MM self-locking metal switch is used. Those requiring a protective circuit board should add one themselves. There is considerable clearance.