Li-poly pwm flashlight

posted May 29th 2007 11:31pm by Will O'Brien
filed under: misc hacks

I was looking for some interesting ideas for using lithium polymer cells and stumbled across this diy flashlight. (It’s on geocities, so hit the cache.) Flashlights aren’t usually that interesting, but this one uses a pair of li-poly cells and a PWM signal generated by a pic controller to regulate the power to the lamp using a IRL1404 MOSFET. It still requires an external li-poly charger, but looks like a nice project to get into li-poly and PWM applications.

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Comments [7]

Reader Comments

is it me or is the cache broken?

Posted at 1:03 am on May 30th, 2007 by bird603568

that’s a fancy flashlight.

Posted at 3:29 am on May 30th, 2007 by lonasindi

its broken

Posted at 12:41 pm on May 30th, 2007 by Matt

Google Cache

Posted at 2:25 pm on May 30th, 2007 by A. Zimlich

http://tinyurl.com/29tk24

Posted at 2:32 pm on May 30th, 2007 by A. Zimlich

ahh, LiPoly batteries, i do love thier energy output compared to something like a Ni-Cd or just plain lithium cells. also, ATI uses PWM in thier fans, but after AMD bought them, i dont know if they still PWM thier board cooler fans

Posted at 6:49 am on Jun 1st, 2007 by Bob7k

Cool site

Posted at 7:11 am on Jul 16th, 2007 by Sally Kraus