Hand powered smartphone charger updated

Computers & Mobile Technology
Hand powered smartphone charger updated
crank_charger_update.jpg

Back in October 2010 Ben Heckendorn discovered that a hand-cranked LED flashlight had enough juice to recharge his smartphone. He recently revisited this idea on his show and updated the hack by adding a simple voltage regulating circuit using a Zener diode and a 100hm resister. He also added a USB port to plug in a microUSB recharging cable. (via electronista)

Hand powered smartphone charger from an LED flashlight

2 thoughts on “Hand powered smartphone charger updated

  1. TrangTT says:

    This imformation is a great help. Try to keep your imformation. I and other people need to understand about it. Thank you !

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