Let's make an #e-bike out of garbage. You will need.

* One dumpster bike (free)
* One cargo rack (free)
* One hub motor (dumpster dived, but about $200 new)
* One motor controller (about $20-$50 new)
* A battery (recycled, but about $100 new)

I'm going to rewire some used 12v lithium batteries to make a 36v battery with a smart battery management system (monitor charge from your phone).

I started by installing the front wheel, installing the cargo rack, mocking up where I'll mount the battery, controller and throttle.

Next I'll wire the key components, get the wheel turning, then look at which of the other wires need to be connected. (Some brake cutoffs, pedal sensor, maybe a key lock to see if a wild @alice appears).

This happens to be a folding bike, because that's what was at the front of the bike pile.