Hi,
I would appreciate if you could give me some advice on my new project.
It's simple.
Bicycle dynamo (6V,3W) -> Diode Bridge (with 4700μF 35V capacitor) -> Buck Boost Converter -> Mini USB Lithium Battery Charger -> Lithium Ion Battery (3,7V 900mAh)
However I have some questions:
1.) Is 4700uF smoothing capacitor a bit of overkill?
2.) Dynamo output is fixed at ~500mA, but what concerns me is when I'm riding downhill voltage can rise above 20V. Capacitor and buck-boost converter are rated at 35V max... Do I need some kind of protection circuit for short intervals of higher voltage? If so, what would you suggest?
3.) I will connect lamp to the li-ion battery with really thin cables (for electronic projects purposes, don't know the gauge). Can they withstand 1A from battery?
Thank you!
I would appreciate if you could give me some advice on my new project.
It's simple.
Bicycle dynamo (6V,3W) -> Diode Bridge (with 4700μF 35V capacitor) -> Buck Boost Converter -> Mini USB Lithium Battery Charger -> Lithium Ion Battery (3,7V 900mAh)
However I have some questions:
1.) Is 4700uF smoothing capacitor a bit of overkill?
2.) Dynamo output is fixed at ~500mA, but what concerns me is when I'm riding downhill voltage can rise above 20V. Capacitor and buck-boost converter are rated at 35V max... Do I need some kind of protection circuit for short intervals of higher voltage? If so, what would you suggest?
3.) I will connect lamp to the li-ion battery with really thin cables (for electronic projects purposes, don't know the gauge). Can they withstand 1A from battery?
Thank you!