Posted By John R on 24 Apr 2012 09:26 PM
I would like to repair the Headlights on my Helene Locomotive as the Globes have blown!, I have and would prefer to fit LED`s instead as I have many here in stock, but after three strokes and about 2 years off the beat I have no ideas which resistors to use!
I have no track Power and use 12 Volt DC Batteries as a Power scause in a Wagon.
Can some one tell me what colour resisters and which end to solder to the LED please!
John - another alternative is to use a current limiting integrated circuit that will deliver no more than 20 ma to an LED. The device that I use is CL2N3-G - they work very well - I have written up details on their use on my web page - have a look here:
Constant Current IC for LEDs
Please let me know if you have any questions.