With Instructables you can share what you make with the world and tap into an ever-growing community of creative experts.
share what you made with text, photos, video, and files
gather your favorite instructables together
We have a be nice comment policy. Please be positive and constructive.
I've been playing with the circuit and believe I've found some indications as to how to reduce the current used. However, I have not found how to use a battery below ~ 0.6V since the circuit needs somewhere around 0.6V to start. Once started it can run to about 0.4V. You could use two batteries at 0.55V in series. See my site http://cs.yrex.com/ke3fl and search for "Joule Thief" to find the link to my JT page to see what I've found so far. I'm still working on it. -March 2014
Check out my web page on this, it was a question I was interested in and have tried a few things to see what makes it better, uses less current, to run the white LED. I'm not done yet and will be trying a combination of changing the total number of windings and then also decreasing the number of windings going to the base of the transistor. My web page is: http://cs.yrex.com/ke3fl then search on "joule thief"
Joule Thief 10x10 LED Lamp
Joule Thief LED Night Light
Super Simple Inductor Joule Thief!
3W LED Strobe - 2 AA Batteries and Joule Thief
Yet Another Joule Thief Tutorial
high voltage joule thief!
Building a Joule Thief
Make a Joule Thief
High efficiency regulated Joule thief
Joule Thief Charger
Posted:Mar 1, 2010
Download our new apps for iOS, Android and Windows 8!
© 2014 Autodesk, Inc.
By clicking "Create Account" you are indicating that you have read and agree to the Terms of service.
Already a member? Login »
Enter the email associated with your account and we will send you your username and a temporary password.
Not a member? Sign Up »