Uploaded April 2016 | Updated September 2026, 1 hour ago

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DIY bicycle iphone charger made of stepping motor & etc.
The almost materials from junk electronics.
The stepping motor generatores 2 phase AC, the current converted DC by six Diodes. LM7805 makes stable 5V DC.
If you want more efficiency, use DC-DC converter.
Also if you want stable fixed the motor, use double-sided adhesive tape.