On Jun 27, 2008, at 1:00 PM, Jinx wrote:

>> If you use PWM to drive the LEDs you may not need current-
>> limiting resistors. Adjust the duty cycle to suit the supply voltage
>

I am sorry.  I do not understand the above statement.  Does this  
presume the power supply is current limited ? Or what ?  What am I  
missing ?  What if the supply is not current limited ?  Do the traces  
provide enough resistance ?  Or is there enough inductance to limit  
current ?  Tell me why this would work in a practical application.
Best
cc
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