In short, it’s blown up because it’s intended to be a fully circular, lifelong toothbrush. Suri claims the brush is ...

Here he’s posing with the electric paint brush which he developed after seeing some local painters struggling with brushes and buckets at the top of a ladder. His system uses a 1 hp motor to ...

Being a simple demo, the brushes are probably not as robust as in a real motor, but for understanding how it works, it is a great demonstration. If you’d rather build a brushless motor ...