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Picture of Joule thief bicycle light (front)
Transform cheap bicycle light into Joule thief bicycle light

Step 1: Introduction

Picture of introduction
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I want to apologize for my poor English, but i will give my best to explain and include a lot of pictures for the illustration

First of all, Im not going to explain how j.t. circuit works, or how to make one, for those information you have to look for other sources.
I will explain how to use j.t. circuit with bicycle light and convert it to efficient and relatively cheap source of light.
Ive bought cheapest bicycle light for this project (1 euro) and a small lever switch.
 
brankomaster (author) 2 years ago
If you think about original version (new) it had three modes

full brightness
half brightness
blinking
brankomaster (author) 2 years ago
No it doesn't, on and off only.
I was thinking about that too, something like this

http://free-schematic.blogspot.com/2010/02/15v-led-flasher.html

but than it will always blink, for me its better to continually shine.
does this light have a blinking mode?
brankomaster (author) 2 years ago
Here is the link for instructions how to make Joule thief bicycle light (back)

http://www.instructables.com/id/Joule-thif-bicycle-light-back/