[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 ...

If you’re [James Bruton], you design and build a mini electric bike. Being a prolific builder ... left over from previous projects: a small motor, a 24 volt LiPo battery, an SK8 electronic ...

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 ...

To make things even better, what if this hypothetical build comes with not one but two different ... important things like ...

It's tough to fit ICE powerplants into small machines due to the engines' size, weight, and cost, but you need to try not to ...