P-dog's blog: boring but important

Astronomy and physics education research and comments, field-tested think-pair-share (peer instruction) clicker questions, flashcard questions, in-class activities (lecture-tutorials), current events questions, backwards faded scaffolding laboratories, Hake gains, field-tested multiple-choice and essay exam questions, indices of discrimination, presentation slides, photos, ephemerae, astronomy in the marketplace, unrelated random sketches and minutiae.

20101208

Found physics: joule thief

"101114-1200240"
Waifer X
flic.kr/p/8UVKH3

Joule thief (wki.pe/Joule_thief), built with Radio Shack parts and a mint tin, circuit diagram based on Make magazine's how-to tutorial (makezine.com/2007/11/02/make-a-joule-thief-weeken-1/).

1 comment:

Watson aName12:33 AM
My version of a LED light in an Altoids tin. A Joule Thief is not needed when three AA cells are used. Just connect a 33 ohm resistor in series with each LED.

http://watsonseblog.blogspot.com/2006/10/quik-brite-led-lights-my-own-version.html
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