[Tom Stanton] wanted to see if supercaps have any practical use on e-bikes, and built a DIY electric motor in the process. One of the problems with supercaps is the rapid voltage drop during ...

Rubbee consists of a polyurethane roller wired to a 14.4-volt battery pack. The doohickey presses the roller against the back tire of the bike, propelling it with the force of wheel-on-wheel friction ...

But the real gem? The weird janky motor he built to run it. The concept is simple. An e-bike is electric, in that it has an electric motor and a source of electric power. However, [Tom] intended ...