Joule Thief

[Pirate88179]

@ Thaelin:

Thanks for the link.  I will check them out...I have a lot to learn and I love learning.


Can anyone tell me how to tell the difference from the emitter and collector on the 2N3904 transistor?  I made my first joule thief and it does not work for some reason...yes, I'm sure it is something I did, or didn't do correctly.  I think I may have a polarity problem as the instructions indicate the collector and emitter but do not say which is which.  I am not talking about the middle lead, that is cool.  It is the ones on either end I am not sure about.  Thanks.

Also, here are some links to the Dr. Walter Lewin, MIT lecture series.  These are great, check them out.

http://www.learnerstv.com/course.php?cat=Physics

http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/VideoLectures/

http://freescienceonline.blogspot.com/2006_07_01_archive.html


Bill

[nievesoliveras]

@pirate

The correct definition could be this one:

Jesus

[Pirate88179]

Jesus:

Thank you!!  The info for the 2N is right there, exactly what I needed.  I really appreciate your response.

Bill

[capthook]

Also, here are some links to the Dr. Walter Lewin, MIT lecture series.  These are great, check them out.

http://www.learnerstv.com/course.php?cat=Physics

http://ocw.mit.edu/OcwWeb/Physics/8-01Physics-IFall1999/VideoLectures/

http://freescienceonline.blogspot.com/2006_07_01_archive.html

Bill

Thanks for the links!  I had seen a few videos of his lectures - and now there's vids of the entire course to absorb.

He is the mad professor type that teaches with enthusiasm that makes the learning even more interesting.

It's resources like these that make me still ohh-and-aah with wonder at the marvel of the internet.

[Cap-Z-ro]

I thanked you for those links in a PM Bill.

Don't know if it got through tho, due to a browser glitch.

Thanks also to and Thaelin and jesus for the instructional info.

Regards...