Altoids Joule Thief Flashlight

Intro: Altoids Joule Thief Flashlight

A flashlight i made out of a simple joule thief circuit, 2 ultra brite LED's, and a dead battery.

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    5 Discussions

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    Maxsplat

    6 years ago on Introduction

    Any chance of you posting the directions on how to make this?

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    andrew101

    9 years ago on Introduction

    i love joule theif. nice way to put it. what gauge of wire are you using for the coil? im using a really small gauge, and its hard to solder with. its enamled transformer wire, about 40 turns around. i guess i dont need that many if your getting such good results.

    1 reply

    i think i used .35 gauge copper insulated, it is hard to solder with , thats why i used such large beads of solder .. you only need about 8-13 turns and its best to use a uncoated toroid