03-17-2011, 08:21 AM
No, you can't dim the LED with a CV. You need a larger resistor. A light coat of Tamiya transparent paints may work as an alternative if it's not possible to change the resistor. TCS decoders have a CV to adjust the 'dim brightness' of the headlight but that's for when you have the light dimmed, not in the normal 'on' position. For white LEDs a 1K resistor is a good starting point, usualyl still way too bright so use a bigger one. Many factory installs use only a 680 ohm resistor, which operates the LED within specifications but is REALLY bright.
--Randy
--Randy
Modeling the Reading Railroad of the 1950's in HO
Visit my web site to see layout progress and other information:
http://www.readingeastpenn.com
Visit my web site to see layout progress and other information:
http://www.readingeastpenn.com