Another LED Question

Lots of answers to this depending on track voltage. If you are running command @18 VAc, might be a little bright but being as they are warm white, shouldn't look too bad. You can connect them directly to track power, but you should put a low power diode in series, in either one of the leads.

If are running conventional you can also hook up directly to track power, but at voltages lower than 10VAC they might look a little dim, and of course it will vary with the voltage. If you are OK with this ,fine.

Others will chime in with other ideas.

Rod

I have hooked up lights like the one pictured to engines with no problems whatsoever.  The attached resistor takes care of any compatibility issues.

If you are doing 2 number boards the leds can be paralleled in reverse polarity then a resister put in series. I was going back and forth with John on converting a sd70’s number board to leds. He recommended a 4.7k resistor with the parallel combo. Actually,works great. Looks good.

In my case Smaller leds then 3mm are needed. As, I want to mount the led’s on the original circuit board where the grain of wheats were located... The 3mm are silently two large.

You can either go with 2mm post LED lamps or resort to surface mount LED chips.

Thank You Gents for all the replies. 

I bought this engine used with no history.  F3 CP early Legacy 2010   6-34582

One of two number board lights were out on both the powered and dummy units.

In the pics you can see the lights and the resistor that was used.....I don't think it is the correct resistor and if so....probably the cause of the failure?

The power and ground were taken from the Program/Run switch (ground) and (power) from the smoke on/off switch.

Wish Lionel would have left the parts site up just so research could be done.

I had on hand the Universal LEDS that Evans sells and installed two so far in this dummy unit.  They work great!

Then I came across the E Bay offering mentioned and wondered about them.

Polarity of course is not a concern, nor is AC / DC when using Evans.  Plug and play.

Is Polarity a concern  using the E Bay product mentioned initially?  Would longevity be better with the Evans lights as opposed to the E Bay product?  Or would it not matter.

Thank You

Dave

gunrunnerjohn posted:

You can either go with 2mm post LED lamps or resort to surface mount LED chips.

Exactly, what I went with! 

Soo Line posted:

Thank You Gents for all the replies. 

I bought this engine used with no history.  F3 CP early Legacy 2010   6-34582

One of two number board lights were out on both the powered and dummy units.

In the pics you can see the lights and the resistor that was used.....I don't think it is the correct resistor and if so....probably the cause of the failure?

The power and ground were taken from the Program/Run switch (ground) and (power) from the smoke on/off switch.

Wish Lionel would have left the parts site up just so research could be done.

I had on hand the Universal LEDS that Evans sells and installed two so far in this dummy unit.  They work great!

Then I came across the E Bay offering mentioned and wondered about them.

Polarity of course is not a concern, nor is AC / DC when using Evans.  Plug and play.

Is Polarity a concern  using the E Bay product mentioned initially?  Would longevity be better with the Evans lights as opposed to the E Bay product?  Or would it not matter.

Thank You

Dave

 

 

 

 

Looks like a 1K resistor, plenty for the job.  I don't think that's the cause of the failure.

Thanks for that John.

Not sure what to make of it,  now that I know the resistor was okay.

I've installed Evans lights...universals 7-19 V   AC/DC....in both units.  This should solve things.

Ron A if you are still watching.....was polarity necessary on the light arrangement you used?

Thanks Gents to all who responded.  Much appreciated.

Dave

Dave,

I use bulbs from Evan Designs.  They are not polarity sensitive.  You can attach either wire to positive or negative.

Ron

RON ARNDT 091718 posted:

Dave,

I use bulbs from Evan Designs.  They are not polarity sensitive.  You can attach either wire to positive or negative.

 

Ron

You are talking about the regulator that comes with the ac in. I’m talking about using my own led’s and a resistor.