Hmm. The maximum torque slider and the number of speeds field indicate that the toothbrush would come with some sort of tiny tiny transmission. You’d need both a potentiometer to vary motor speed (thumb side), a rudimentary gear select (index finger), and a clutch button (pinky?). If you’re limiting torque, then you need voltage regulation circuits, which probably means a more constant power source than a battery can provide. However, I doubt UL would approve of a device with an AC wall adapter that you stick in your mouth. It would need a fuel burning engine. Since we are dealing with health here, gasoline is right out. Ethanol is too flammible, and so is methanol. Propanol is great, and guess what! Most people keep propanol (or an isoform thereof) in their medicine cabinet! The toothbrush burns isopropyl (rubbing) alcohol! Yay!

Christ. I actually started to click “learn the benefits of automatic!”.

It’s the perfect solution, as you now the client is always righteven if they are wrong. So the solution you get can’t be better. ehehe

Guys, I part my hair on the other side! And what’s with the man-hands??

It’s okay, Eric. I clicked there out of instinct.