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Subject:2 LEDs
From:Mike S
Date:Tue, 18 Sep 2007 18:09:00 -0400
This is for David Kao, who asked for help in running a simple
electrical experiment with 2 LEDs. I used a 12V regulated source.

(12V - (2 x 2.1V)) / 0.02A = 390 ohms.

http://www.flatsurface.com/pics/2LEDs.jpg

Works great! Neither is significantly brighter than the other, and
neither blew up, despite dire predictions.