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Joule Thief Circuit - Inductive coupling example

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Again, I apologize about the quality, my good camera's recordings don't want to upload.

This was just quickly thrown together so its nothing fancy.

The red and black pancake coil is bifiler and set up just like a Joule Thief circuit without the LED or resistor.
The green pancake is single file and has the LED on it to receive the power from the joule thief circuit.
Roughly 6ft of each color was used.
The transistor used here is a 2n3904, but just about any NPN should work.

Fun little project.
Here is a bigger one done by Slayer.
http://www.youtube.com/watch?v=dSUGXCWIVoI

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