mini light bulbs to work on DCC and DC

[Thunder Wolf]

I have a DCC, Ho scale locomotive with ditch lights that use miniatronics 1.5V 15ma mini light bulbs and a SDH164D Digitrax decoder (The light bulbs are connected to the Violet and green wires on the decoder).  I need help with the ditch light light bulbs, one problem is that I run it on DCC at home and it runs DC power a my friends layout; so the problem is that the ditch lights are so dim that you can't see them on DC power.  Does any one know of a way that the lights will be bright enough on DCC and DC without burning out (like with a capacitor or something)?

Thanks!!

[Texas Zepher]

You have entered the twighlight-zone of DC constant intensity lighting.  I know several ways to do that, but have not considered how any of them would work in conjunction with DCC.

[Johnnny_reb]

A voltage regulator circuit combined with a diode to control the polarity of the input should do it.

[Johnnny_reb]

This should help

 

http://www.awrr.com/lighting.html

[PennCentral99]

I use Evans Designs LED.  I had a DC turntable on my DCC layout and when travelling back and forth between the two, the brightness/intensity was the same.  Here is the link:

http://www.modeltrainsoftware.com/bl-212.html