Brooke Clarke wrote:
> Hi Enki:
> I think something like this is the answer.  The specs say 2.8 to 12 volt 
> operation (notice not 1.5 V) and 1 Watt power, so it's not really a joule theif.
>
> Hi Martin:
> No Scope needed.  Just look at the bench supply meters as the voltage is 
> changed.  Data at: http://www.prc68.com/I/LED.shtml#E10LED
> shows constant 1 watt power load.  $8 Superbrightleds.com  T10-WHP
>
> Hi Olin:
> Thanks for the new link, I've updated my page.
>
> Hi David VanHorn:
> Yes.  I think of Switching Mode Power Supplies as transformers for DC.
>
>   
Brooke,
You posted numbers showing relatively constant power anyway, then asked 
"what's going on?" The oscilloscope was merely a suggestion.
-
Martin
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist