Hi guys,
currently designing my own renewable energy charger to charge USB devices. Instead of going for a crazy source of energy i'm limiting myself to what is doable in a short time scale. So its down to one question.
SOLAR or HUMAN POWERED (probably some form of wind-up)
From what i've found small solar cells arent very efficient (and are more expensive) so am edging more towards - a novel approach to a human powered device. However you probably know more than me on the matter, hence me posting a thread.
Would love to hear your point of view on the topic. Electronics is still very new to me so any input would be great. Thanks guys!
Tom