diy posted by

Tesla Torch – amazing DIY flashlight gives 1 min of light for every 1 second of hand cranking

teslatorch (2)

If you’ve ever tried to use a hand crank flashlight, you will know that they’re a) very cool but b) a real pain, because you need to keep cranking the handle until your arm drops off to get any decent amount of run time out of the LED bulbs. But now some very clever chap has come up with a superb 3D printed DIY solution.

This Tesla Torch can be made on any ordinary 3D printer, and delivers a superb 1 minute of light for every second of hand cranking, thanks to some clever electrical engineering. It’s pretty neat, and even more so, since the developer has released the how to video and build plans openly for anyone to copy.


He also occasionally sells the prototypes on eBay to fund more development, but right now they’re all out of stock, so it’s back to a soldering iron and some patient fiddling around. Oh and a 3D printer of course. Surely it can’t be long before someone crowdfunds this and opens it up to the market?

Latest How to build video

Nigel is the managing editor of the Red Ferret, as well as a freelance columnist for the Sunday Times newspaper in London. Loves tech and fancies himself as a bit of a futurist, but then don’t we all?

Nigel – who has written posts on The Red Ferret Journal.

1 Comment

  • Very informative blog post. These photos are awesome. And this video also clear to us how tesla torch make. Thanks for sharing.

comments powered by Disqus

Side Advert

DHgate Cheap electronics gadgets

FB Like Box


Managing Editor:
Nigel Powell

Deputy Editor:
Donyae Coles
Editor at Large:
Dan Ferris
Senior Ecological Editor:
Debra Atlas
Senior Motoring Editor:
Nick Johnson
Reviews Editor:
Simon Bossuyt

Write For Us

Red Ferret Video Reviews