I suspect the world would be better if that percentage were even greater.
Improved Joule Thief Circuit
While surfing for more LED information, I found this rather nifty little circuit on Electronic Design’s website. It’s a little Joule Thief-like circuit, but with enhanced efficiency (~80%) and it can drive white LEDs with rather large forward voltage drops. Archived for later….
Comments
Comment from MikeK
Time 5/19/2013 at 5:18 pm
The ED link is bad, here’s the current one: http://electronicdesign.com/energy/single-alkaline-battery-drives-white-led
Comment from Watson
Time 5/21/2011 at 8:51 pm
See my blog for details about this circuit.
http://watsonseblog.blogspot.com/2011/05/2011-may-11-electronicdesigncom-jt.html