Group,
I have been frustrated this afternoon trying to put Utah Pacific markers in a caboose attached to a decoder. If I try a single 1.5 v bulb and 2 diodes they work fine on the blue a white but if I try the 2marker lights I get nothing? I know they work because I can put the leads to a AAA battery 1.5v and they both light? What am I doing wrong?????????
Sam
I don't understand why you are using the diodes or how you are wiring it using them.I connected one wire of each marker to a resistor (Don't remember the value). Then connected two resistor/markers in parallel. The wire with the resistors went to the white (or yellow) wire. The other wire without the resistors went to the blue wire.I set the motor voltage of the decoder to zero for both low and high settings. I also had to connect a resistor to the motor leads (50 ohms) so the decoder would work.
I put markers on all four corners of my caboose. When I select the decoder address, I can then turn the light (markers on one end) on or off. The direction determines what end the markers are turned on.
Elmer.
The above is my opinion, from an active and experienced Model Railroader in N scale and HO since 1961.
(Modeling Freelance, Eastern US, HO scale, in 1962, with NCE DCC for locomotive control and a stand alone LocoNet for block detection and signals.) http://waynes-trains.com/ at home, and N scale at the Club.
I first tried 750 Resistors just as you said but with them attached to the blue wire and the other end of the markers to the white one. That didn't work so I tried 2 diodes in with an added resistor and again it worked with the single bulb but did not work with the 2 markers?????
Sam.
What decoder are you using? If you are using a function only decoder it would be better to use one function wire for each bulb. If the bulbs draw too much current it could be over taxing the light circuit of the decoder.
Pete
I pray every day I break even, Cause I can really use the money!
I started with nothing and still have most of it left!