[volt-nuts] Finally got around to modifying my Fluke 845ab with LED's

[Brooke Clarke]

Hi Mark:

Do you have a web page on the LED analyzer/integrating sphere?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html

Mark Sims wrote:
> I would probably use green or yellow LEDs,  but the white ones should not be a problem.
>   I built an LED analyzer/integrating sphere and one of the features is a circuit that optically measures the LED driver PWM frequency.  It can also detect the minute variance in LED intensity from an LED driven by a 950 kHz boost converter.  It also had no problems with a white LED driven at 4 MHz from a signal generator.  You see the long persistence phosphors mainly in large lighting LEDs and not in small indicator LEDs. 		 	   		
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