Introduction: Generate enough power to charge 12 volt batteries.
There are increasing numbers of people who are behind on their utility bills and could have their electricity cut off. They need something to help reduce their dependence on the electric company, something that can also supplement wind and solar power generation. This may help.
This is a project to generate practical amounts of electric power by using bike pedals. I ended up using three stages of chain to drive a DC motor as a generator and charge a car battery. The use of chains turns out to be durable and efficient. The various sprocket sizes let you choose the speed that you need for the motor you have.
I used a discarded 24volt scooter motor in this project, but this thing is flexible enough to work with lots of different DC motors.
Everything in this project was from stuff I found in the course of my dumpster diving, including various bicycles and bike parts. I have no prices for any of this.
Above, you can see a photo of my contraption. Find a good, comfortable seat for this, otherwise your derriere will get quite sore.
Step 1: Materials Needed
1. Scooter motor with it’s chain and sprockets.
2. Cheap jumper cable.
3. Two rear bike axles with nested sprocket.
4. Two small hinges.
5. Two bike frames.
6. Two metal brackets.
7. Plywood. 16“x20“x5/8“ and 11“x16“x5/8“.
8. Lumber. two 2x6x18“, two 2x6x15“, one 2x4x28“, and one 1x2x14“.
9. Mounting board for the motor. About 6x6x3/4“
10. Two bike chains and chain tool.
11. Diode. 100 volt, 3 amp will do.
Absent a scooter motor, you could test various other motors by spinning the shaft with an electric drill while monitoring and comparing outputs.