How to make a Joule Thief circuit that powers a Compact Fluorescent Lightbulb (CFL) using batteries, in this case the Jeanna's Light approach. I go step-by-step on how to make the circuit, including details on how to wind the coils which is the trickiest part. This uses just two AA batteries, a switch, a 2N3055 power transistor, a 100 ohm variable resistor or potentiometer, a ferrite toroid core, and for the coils, some 30 gauge magnet wire along with some more thickly insulated wire for the high voltage side. I also do some demonstrations lighting up my office, outdoors and for reading.
This video has correct English captions. Click on the CC button at the bottom of the video to see them.
For all sorts of measurements and demonstrations of this joule thief and CFL see my follow-up video "Fun with Joule Thief Powering a CFL":
For details on how a Joule Thief works, see my "How a Joule Thief Works" video:
For how to make a simpler Joule Thief that lights an LED using a dead AA battery, see my "Make a Joule Thief for Zombie Batteries" video:
To see how to attach the transistor to a heat sink to prevent overheating, see my "How to mount/attach transistor to heatsink (2N3055)" video:
And to see how to make a very simple AM radio transmitter see my "How to Make AM Radio Transmitter" video:
For more about the Joule Thief circuit, see my website here:
And here's Jeanna's channel:
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Music used for the first part:
A Darker Heart - music by audionautix.com
Music used for the second part:
5 Cents Back - music by audionautix.com