Review on Enhanced USB Fan Speed Controller: Stepless Mini USB 🔧 Fan Governor with Regulator Speed Control Knob & Switch (3PCS) by Ray Mcknight

When measuring for the 3D printing of the protective box, I noticed that all three micro-USB ports were installed crookedly and at the same angle. Some robot was having a bad day. And on closer inspection I found a jumper (wow!) from the pan to the resistor. This needs to be fixed. The alcohol will take care of the excess solder residue. But I'm still not complaining. The price is correct. All three could dim some LEDs and control the fan. It probably doesn't hurt to test them before using them. The print files for this box are at thingiverse.thingiverse dot com/thing:4897440 "fan speed control box".