To Jim Weir

Scott wrote:


Maybe this will help the builder. A current source (rather than a
voltage source) will make the LED brightness varaiable. A typical
(red) LED runs at about 20 mA for full brightness, while dropping
about 1.7V across the LED. Lowering this current dims the LED. The
shown circuit can be set to supply up to about 400 mA, enough for
about 20 LEDs. Of course, he will want to use red LEDs in place of
the white ones drawn in the circuit...

http://radiolocation.tripod.com/LEDd...ampDimmer.html

Scott


Didn't Weir do an article in "Kit Planes" awhile back on this subject?

Dan, U.S. Air Force, retired

Dunno. Haven't gotten the rag in a couple years. Price stayed the same
but page count went down, didn't find it cost effective, with all the
magazines I was gettin'. That said, I wouldn't doubt it was covered at
one time or another...