How to make a hand crank flashlight

This looks like a fun project. I think it works so well, or at least, seams to in the video because LEDs are so damn efficient.

I would make it somewhat differently, but this is good. For one thing, I'd probably make it out of an LED flashlight, swapping out the batteries for a motor.

And then, when you have your flashlight ready, you can do this!

(Hat tip: David Cassatt)

More like this

What's a bloggercon without a discussion of traffic and how to raise it... Continuing the ongoing coverage of ConvergeSouth.... Saturday afternoon - the last session of the day. Michael Cobb Bowen, aka Cobb, is one cool dude. He runs a conservative blog AND a progressive blog. He is a smart African…
I'd like to call a truce on the War on Christmas. The true meaning of this holiday is, of course, the presents, and pursuant to that I have some suggestions for you in case you are stuck. Dr Who Presents The Doctor Who TARDIS Cookie Jar is a must have because is is a Dr. Who Thing, it is a TARDIS…
In my mind, and in my car, we can't rewind, we've gone too far, pictures came and broke your heart, put the blame on VTR. And for those of you who are under the age of 25, VTR stands for Video Tape Recorder. This was the Buggles, who made the first music video that ever appeared on MTV, back when…
My Terrapins lost to the hated Dukies yesterday, 96-88. I'd be more down, but they actually played pretty well-- they just aren't that good a team this year, and Duke is better than they are. They gave a great effort, though, and might've had a chance if they'd had more than half of the right game…

The issue is getting the right gear motor, which is unspecified. :(

The gearing is going to be pretty bulky, unless you specifically design it to be not bulky. Usually these gear motors are designed for specific purpose mechanical devices where there is plenty of bulk to accommodate inefficient design.

Getting a high gear reduction requires multiple gears, unless a worm gear is used, but then the gear train can't be operated from the other end.

By David Whitlock (not verified) on 13 Sep 2016 #permalink