Those portable shake-to-charge devices seem like a good idea, especially for the battery challenged, but how well does this sort of thing really work? Engineer Dave Johnson took this flashlight to the ...

Bored of playing around with capacitors? Then its time for you to move on to super-capacitors. These have huge storage capabilities. In this article you will find out how to build a small LED ...

Over the weekend I've had the opportunity to play with a tactical flashlight powered not by batteries but ultra-capacitors. The advantage is that unlike rechargeable batteries, ultra-capacitors ...

[Caleb] was given a tiny LED flashlight which has a crank used to charge it. Unfortunately it wasn’t holding a charge, and constant cranking didn’t work very well either. He cracked it open to find a ...

This reference design presents Z8 Encore! XP microcontroller used as a LED flashlight controller. The reference design uses Zilog’s Z8F082A microcontroller to control the power and functional modes of ...