LED Circuitry

11:25 a.m. on February 10, 2007 (EST)
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Hi, you always hear about headlamps and such that have circuitry to maintian a certain volatage to regulate the lights brightness as the batteries die. As and electrical engineering student, I am curious to know what type of circuitry is used without cracking open my own headlamp. Anyone have any idea or comments?

1:41 p.m. on February 10, 2007 (EST)
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There are numerous circuits out there, but try googling for 'buck puck' to get you started. This is an IC that does most of this circuit wizardry. Maxum/Dallas also makes some ICs that I have considered using.

I can't remember where, but I found some examples of non-IC discrete examples of how this is done and theory behind it all.

It's real simple and AVRs can handle the PWM for the strobe and dimming.


9:40 p.m. on February 10, 2007 (EST)
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Check out candlepowerforums.com.

May 22, 2018
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