With advancement and availability of small parts suitable for model railways, some people like night running with lights on the locos and lights in rolling stock. Here is how I install the interior lights - this one is a NSW SHG (Australian)- first with track power for the lights then updated with a Function Decoder for the lights (TCS FL4).
|This shows the finished SHG brake van.
All the lights run straight off the track power - DCC of cause.
The red LED looks a little too bright here - but each function output can be adjusted with a CV.
|Body taken off to show what is required inside.
The lights in the passenger section are 3 x 603 SMD LEDs soldered in series withn a 1K0 resistor - also SMD.
The Vero board on the left is used to mount and connect the diodes and capacitor and the wires from the power pickups.
Make sure you put the capacitor with the (-) to the negative side of the rectifier.
|This shows the three LEDs and resistor, the resistor is on the extreme left.|
|This one is the small piece of PCB sleeper used as a connector and mount for the resistor.|
|The RED LED is mounted on the light bracket on the end of the car - where you would hang the lantern.|
|Now the important part - pickups.
I use a short piece of PCB sleeper/tie glued to top of the bolster on the truck.
A piece of 10 thou Phosphor Bronze is then spldered to the PCB - there is one on each side. They are bent at the ends to touch the back of the flanges - less drag.
Light wire (SWG 32 or SWG 36) is used to connect the pickups to the PCB in the car.
|The board is mounted on double sided tape - make sure you only use the black stuff with the green backing. The white tape often has aluminium powder in it.|
|This is a short piece of PCB sleeper/tie. I used a craft knife to cut through the copper - as shown. An SMD resistor is solded across the middle break, and an LED across each of the other two gaps on either side - make sure both of LEDs are pointing the same way.|
|Here the decoder is attached to the PCB along with a suitable capacitor (24 volts 470uf).
The PCB on the bottom left is the light unit for the guards compartment and will be mounted on the roof.
The decoder here is a TCS FL4.
|The decoder has been programmed - the address is 2257 - the passenger lights on F0 shown here.
|F1 switches on the RED rear light.
F3 controls the lights in the conductors section.
|With the body on - the conductors light is on.|
|We now have the lights for the passengers.|
|The red lantern has been added and we are ready to roll.
The brightness of each of the outputs from the decoder can be adjusted with CVs to get the right brightness.
This method can be applied to any car requiring lights.