How a Joule Thief Works

Channel: RimstarOrg

692,809

TIP: Right-click and select "Save link as.." to download video

Initializing link download... Initializing link download.....

Step-by-step run through of how a Joule Thief circuit works. Includes how all the parts, the 1.5 volt AA battery, the resistor, the transistor and the ferrite core with its two coils of wire work together to build up energy in a magnetic field which then collapses to produce enough voltage and current to light an LED (Light Emitting Diode.) This includes explanations of the feedback that rapidly opens the transistor between base and emitter to open up the emitter to collector too. And also the feedback that slams the transistor shut again.

See also this video on How to Make a Joule Thief (called Make a Joule Thief for Zombie Batteries):
http://youtu.be/B61DU7yEsPM

For how to make a joule thief power a compact fluorescent light (CFL) watch "How to Make Joule Thief Light a CFL - Jeanna's Light":
http://youtu.be/FkLET8MhRbU

For all sorts of measurements and demonstrations of my joule thief powering a CFL watch "Fun with Joule Thief Powering a CFL":
http://youtu.be/yz_99oVMbSI

And also this webpage about Joule Thiefs:
http://rimstar.org/sdenergy/joule_thief.htm

Follow behind-the-scenes on:
Twitter https://twitter.com/#!/RimStarz
Google+ https://plus.google.com/116395125136223897621
Facebook https://www.facebook.com/rimstarorg

http://rimstar.org