Joule Thief

xee2 · March 06, 2010, 02:49:06 AM

@ kooler

Your circuit shows the LEDs in series but in the video they look like they are in parallel.

xee2 · March 06, 2010, 02:51:42 AM

I did a few more tests with slayer007 circuit. As he has said, the turns ratio is critical.

kooler · March 06, 2010, 09:10:58 AM

Quote from: xee2 on March 06, 2010, 02:49:06 AM
@ kooler

Your circuit shows the LEDs in series but in the video they look like they are in parallel.

yea thanks i just fixed it..
don't know why i keep doing that

robbie

xee2 · March 06, 2010, 11:11:15 AM

@ slayer007

This is an untested suggestion that should allow easier control of feedback.

EDIT: I tried this and it did not work very well. I am not sure why.

slayer007 · March 06, 2010, 06:35:53 PM

Thanks Xee2 I also tried something very close to what your showing.But my results were not that impressive.

In this video I just wanted to show the range the 20w FL will stay lit before going out totally.(It was around 12")
I also have a second tower 15" away from the main tower.
The L2 coil on the main coil is adjusted for the strongest output on the second receiver tower.
This test was ran off the cell phone charger that uses one AA battery 1.5v and puts out around 5.5v.

Here is the video.
http://www.youtube.com/watch?v=KrsvdVtvJDE