Replace light bulbs with LEDs in LGB 0-4-0 Porter?

[Lylat1an]

Are there any LEDs out there the proper size to replace the stock bulbs in a LGB 0-4-0 Porter?

If so, what resistors will I need to run them on a 12 volt circuit?

 

[JimmyB]

I have replaced mine with 3mm LEDs and I use a 1K ohm resistor with 11.1 volts battery pack. If I recall the Porter has plug in lamps, so I just plugged the LED in.

 

[Lylat1an]

I use a 1K ohm resistor with 11.1 volts battery pack.

Do you recall the wattage of the resistor?

 

[Greg Elmassian]

Please use a LED calculator if you cannot calculate the wattage yourself. Also, you need to calculate from the proper voltage of course.

Might I suggest a little information:

LED Lighting Basics

Greg Elmassian web site on large scale trains and garden railroads, cigars, and computers

elmassian.com

 

[PhilP]

Current limiting Resistor calculator for leds

ledcalc.com

Also some reading, and a calculator, here.. - Not perfect, Greg and I don't fully agree with the calculations provided, but you should not let the 'magic smoke' out with the values you get from this site..

PhilP.

 

[Greg Elmassian]

Interesting, what do you disagree with? can you give an example of where it is wrong? Specific values for voltage, current and forward voltage drop, and the wrong "answers"?

I did a cursory check, and it looked right, but let's find if it indeed is wrong, and I'll find a better one. You do realize that you provided a link to exactly the same calculator I recommend on my web page, right?

Greg

 

[Dan]

In order to properly use the LED one needs to know the LED current and voltage to get the proper resistor and the led calculators will do this for people that do not know the math. AND always go higher with the resistor value to insure the led never goees over the max current spec. Most will say this does not matter, but I would not want a 10 cent part to be the cause of damaging via a melt down of some plastic on my 2 hundred plus dollar engine. And for 20 ma leds, all you need is the cl2-N3 current limiter device, no calculations needed.

 

[Greg Elmassian]

Yes Dan, but the point here is what does PhilP find in error?

Phil?

 

[PhilP]

Yes Dan, but the point here is what does PhilP find in error?

Phil?

Sorry.. Only just got to this thread..

Greg,
Apologies, I am *sure* that some-time back, there was a calculator link, and you disagreed with the results, and I was *sure* it was me who posted, and I post Ledcalc.. - As much as anything because it has explanations, and a tutorial.

Now,
Do we go back and clean-up the thread? - I believe the original author of a post, can delete it?

PhilP.

 

[Greg Elmassian]

You can understand my confusion...

In post #4 I give a link to my page on LED basics, it lists 3 calculators, the last one in RED and saying this one is better...

That link is to LEDCALC.

Then in post #5 you say "Also some reading, and a calculator, here.. - Not perfect, Greg and I don't fully agree with the calculations provided, but you should not let the 'magic smoke' out with the values you get from this site.."

but it is the SAME calculator, LEDCALC ....

So I ask in post #6 what you don't fully agree with, in case I missed something...

I really am interested with what you think is wrong with the calculator, unless you disagree with something else.

In either case, my page is there to help people, and if you have found an error, or something I can improve then please let me know.

Greg