Subscribe to Make Magazine Today!
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

Adam Flaherty

Adam Flaherty

I make cool stuff and write about other people making cool stuff on makezine.com. If you have something you think I should see, send me a tip.


One Response to Hand powered smartphone charger updated

Your Thoughts?

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

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

Related Supplies at Maker Shed