Make a hand-crank rechargeable flash light

Megan Treacy

Megan Treacy (@mtreacy)
Technology / Gadgets
September 24, 2013

Intro and Materials

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flashlight materials

credit: brunoip

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Instructables user brunoip gave us permission to share his project for a rechargeable hand crank flashlight. This flashlight is unique in that it uses capacitors instead of batteries.

This DIY project takes on a gadget that can easily be bought in a store, but instead lets you use materials you already have to make something useful. It's also a great way to build your maker skills.

You will need:

Two LEDs, with their silver led holders.
An unipolar stepper motor with its reduction gear.
One or two broken PC motherboards, to remove the capacitors.
Two 220 ohm resistors.
A sheet of cardboard.
A small piece of plastic.
Plastic spacers.
Four rectifier diodes.
Spray paint.