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Subject: Blue LEDs

From: "Paul Schreiber" <synth1@...>
Date: 2003-04-13

>>I am going to use as much as possible Blue LED's..
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GROAN!

>>and in the S&H I wanted to use this high-intensity BLUE LED anyone see any problems with
swapping it out?
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There IS a problem with this module, and you will find similar issues with other modules. Look at
the schematic of the '101 and notice how it's used as a diode (not just a LED). Blue LEDs have
different 'forward voltage drop' and require different currents. Lots of the LED sircuits used
(Like on the '390 LFO) don't use "standard" LED driver circuits. They drive with currents. Some
twiddling may be needed.

Personally, I can't ∗stand∗ blue LEDs but I'm a fruitcake.

Paul S.