11:25 a.m. on February 10, 2007 (EST)
braden
Junior Member
Joined: Jan 24, 2007
Posts: 15
LED Circuitry
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?
Thanks
1:41 p.m. on February 10, 2007 (EST)
Blackbeard
Senior Member
Joined: Jul 14, 2006
Posts: 176
Re: LED Circuitry
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.
Blackbeard.
9:40 p.m. on February 10, 2007 (EST)
RidgeHiker
Junior Member
Joined: Dec 26, 2006
Posts: 23
Re: LED Circuitry
Check out candlepowerforums.com.
