Self-rechargeable battery
Self-rechargeable battery
(OP)
I'm working on a project which involves a circuit board (leds)in a small enclosure (3"Hx3"Wx2"Deep). This would be mounted close to a mechanically driven shaft with variable rpm's(0 to 500 rpm). My question is if it's possible to mount a motor on this shaft to generate enough energy as to recharge the battery in the circuit? If it's a 4.5 volt circuit,What is the smallest motor/battery combination I can use? I appreciate any suggestions.





RE: Self-rechargeable battery
RE: Self-rechargeable battery
http://www.techlib.com/electronics/stepper.html
It has some info on using steppers as generators.
If you make a large pulley for the stepper and use the shaft to drive it, it might get you there. I'd think about using a charge pump and regulator as well.
Ff
RE: Self-rechargeable battery
I like Foxfur's idea of using a charge pump to raise the voltage. However we still need to find a suitable generator (motor) to provide the power you require. Please tell us the current you require for this project.
RE: Self-rechargeable battery
don
RE: Self-rechargeable battery
That's exactly what I had in mind. I'm looking at a particular motor but the current requirement may be too much for it.
RE: Self-rechargeable battery
Check this out...
Take an off the shelf bike gen/light that uses rechargeable batteries.
Hack hack, chop chop, modify the drive system to accept it.
Enjoy!
Here's a link to a new design of a 'sidewall' generator as they call them these days. 4.5watts, 6volts, not bad...
http://www.dynosys-ag.ch/lightspine.html
I think this will work (I want to say "Perfectly" but won't),
Foxfur
RE: Self-rechargeable battery