Battery-Free Flashlight


Check out these supercapacitors – 220 farads!


Holy crap.  Instructables user mrigsby posted instructions on how to build a battery-free LED flashlight that charges in about three minutes and lasts for 24 hours.  Apparently it’s about 2-3 hours of bright light, and then it drops to “night light” levels.  Whatever, I guess – three minutes to charge!

Check out mrigsby‘s instructable.  Very cool!  This project comes from a book called Haywired: Pointless (Yet Awesome) Projects for the Electronically Inclined by mrigsby himself.  This book is totally on my Amazon wishlist.


Thanks, Make and Instructables!

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