[zjrog]

I'm thinking I can add a second sprocket to the rear axle, which would be a freewheel. So I don't think there would be much regenerative charging.

Budget, less than $100. Batteries aren't a real issue, I might be able to get some freebie recycle turn-ins.

Speed, 10 MPH or less. Would like a range of 15 miles, but less isn't bad. I just want the thing to get up hills around town here, and with it freewheeling when pedaling, be almost transparent (minus the battery weight...).

I'll get and post a pic or two of the rear axle and drive stuff later.