I want to power a 4W 30V lamp with a battery that charges by a dynamo/hand crank generator.How can I do this?
I want to power a 4W 30V lamp with a battery that charges by a dynamo/hand crank generator. For batteries, I want to use something like 3.7 V standard phone batteries, or may be camera batteries etc. I understand that I have to use a few phone batteries to get a decent amount of voltage which I can then step up to 30V to power my lamp.
How can I go about doing this? How would you suggest to connect the batteries, and what kind of circuitry (buck/boost regulator, voltage step up, RC circuit etc. ) between the battery and lamp do you think is the best to use for outputting the right voltage? Thanks a bunch! :)