Russel, this is another LED HeadLamp circuit: 

http://radiolocation.tripod.com/LEDdimmer/LEDlampDimmer.html


although this is probably a less efficent design than the first suggested, I have chosen this layout for my cave Lamp and it seems to works rather well..


regards
Marco


     




 

---------- Initial Header -----------

>From      : piclist-bounces@MIT.EDU
To          : "PIC List" PICLIST@MIT.EDU
Cc          : 
Date      : Sat, 09 Sep 2006 23:36:05 +1200
Subject : [EE] Better and harder than average to build LED headlamps







> Two designs for LED headlamps that suit this user's more than usually 
> exacting requirements. Intel IC design engineer (or was anyway :-( ).
> 
> 
>         http://www.resurgentsoftware.com/perfect_led_light.html
> 
> 
> 
> Ref: Rod Macdonald 
> 
> -- 
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
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