Ok so it’s done! There’s an accelerometer taped to a little USB fan (yes, tape I know) and it feels the fan vibrating. That gets fed into a model I trained, and the model tells you if the fan is running fine or if something’s wrong with it. The way I make it “broken” is I stick a bit of blu-tack on one of the blades and it throws the fan off balance and the whole thing shakes differently. The model catches it in about a second and flips to FAULTY. I also made the Arduino’s LED light up when that happens so there’s an actual physical alarm, which is makes it better. Arduino sends 200 readings a second down the USB cable, the model runs in the browser, takes about 0.3ms. The dashboard shows the wave, a live frequency spectrum, and how confident it is also one fun thing I found: the fan spins at 37.5 Hz, so about 2250 rpm. check the video at last image slide or check more of it in my github: https://alioramuss.github.io/stardance-motor-fault-detector/