Joule Thief

[jeanna]

@ jeanna

Hmmmm. What is the resistance between the two screw connectors on your coil?

2.2 ohm and
11.6KOhms to the center connector from either screw

Mine is 1.4 ohms.

I guess you don't have a resistor either.

jeanna

======
@All,

On another subject...
Here is a link to part 2 explanation of my JT with secondary.

http://www.youtube.com/watch?v=1tVlCJiuWH4

HeHe, I just went to get the link address and I see Bill has already commented!

jeanna

[Pirate88179]

Jeanna:

Yes I did.  Trust me, I know how much work and effort goes into making this type of video....it ain't easy.  You are doing a really great job on yours.  Man, when you said those LEDS were bright, you were not kidding!  Great work Jeanna!

I figured out a long time ago that many folks here are not Youtube members but they can still view the videos but they can't rate them or comment upon them.  so, don't ever wonder why you get a lot of views but possibly few comments or ratings.  This took me a while to figure out.  Even my friends call me and say ...hey, nice video.  I ask if they left a comment and, of course, they can't because they didn't sign up.  Oh well.

Very good video series Jeanna.  I am looking forward to seeing more.

Bill

[xee2]

@ all

A VERY low voltage low power JT. Only requires 0.167 volts at 6 mA to light LED dimly (see photo of LED lighting at 0.167 volts). Gets brighter as voltage increases. Using lower base resistance will also increase brightness.

EDIT: corrected diagram

[xee2]

@ all

The germanium JT circuit should stay lit for 13 minutes using two 10 F super caps in parallel (20 F) charged to 1.4 volts. This means that the circuit will rum at voltages even lower than 0.167 volts. Stays lit about 11 seconds if 3 volt battery is used (two AA batteries).

[Pirate88179]

XEE2:

Nice circuits.  Do you have a source for the germanium transistors?  I have one that Al sent to me but I would like to get more.  Are all transistors with that number germanium, or do you have to specifically look for germanium?

Thanks,

BIll