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LED Light testing How-to & Homemade testers
Posted by desertdrover On 03/19/2018 At 3:45:11 PM
There are many questions from Forum members on how do I test an LED. Here are four (4) How-to ways to accomplish this task. Depending on your needs or skills these are some pretty simple ways to get the job done. Starting 1: with a Digital Multimeter, 2: using 9 Volt battery with 1K Ohm resistor in-line homemade tester, 3: using two (2) double ďAĒ batteries, or 4: a nifty little gadget from Ngineering using a Nine (9) volt battery with a circuit board with installed resistors for testing LEDís.
Starting with the use of a Digital Multimeter, connect the Black test lead to the COM jack and the Red test lead to the Note that the polarity of the Red test lead is ď+Ē).
Set the meter Function switch to the range (see picture below) and connect the test leads across the diode/LED. If the LED does not light, switch your red and black leads on the LED. When the LED lights whatever black lead clip is on your LED leads will be your (-) Neg. Cathode lead and that is where your resistor will be placed when installing into your Locomotive, Rail Critter, Structures or any LED lighting situation.

Second method using a homemade 9 Volt battery with 1K Ohm resistor in-line homemade tester. Get a set of red and black wires on a 9 volt battery snap on clip, and place an LED holder, or red and black alligator clips, on the other end of the red and black wires. Place a 1K Ohm resistor in-line on the black wire. To test an LED, place the LED into the LED holder, or use your alligator clips, and again if it lights, note what lead the black wire goes to on the LED leads, and that is your (-) Neg. Cathode lead and where your resistor is attached.

Third method using a double ďAĒ battery case with two (2) double ďA batteries homemade tester. Attach a set of red and black alligator clips to the battery case red and black wires. (No resistor needed for this tester) Connect your LED to the tester clips and again, if it lights, note what lead the black wire goes to on the LED leads, and that is your (-) Neg. Cathode lead and where your resistor is attached for when you install it into your locomotive decoders White (Forward) or Yellow (Reverse) light leads.

The last LED tester is a device made by Ngineering, Part #N8021, for testing LEDís, nothing more than the same as your homemade second tester using a nine (9) volt battery and resistor. This device already has a resistor installed into a circuit board with nice convenient attachment clips for your LED leads. And same as all the other testers, the black lead shows your (-) Neg. Cathode lead and where your resistor gets attached prior to installation.

Also posed into the DCC, Computers and Electronics for Model Railroads
"Natural" Porch Posts
Posted by TC On 03/17/2018 At 11:14:13 PM
I'm looking for some creative ideas on how to model (in 1:87 scale) porch posts similar to the ones in this photo by Dorothea Lange (found at this Wiki link) taken by her in Gordonton, North Carolina. Anyone have thoughts on how to approach it?

Another Photo Run-By at the F&SM RR
Posted by halrey On 03/17/2018 At 6:36:57 PM
Well, I made another photo run-by at the F&SM RR two days ago. George has replaced some of the older buildings that had been built in a rush with some new structures. The restaurant with the pawn shop are a Downtown Deco kit, while the other 2 are scratch built. The fish company bldg. covers a turnout motor.
Always new improvements every time I stop by, got to love it!


Grandt Line Closing
Posted by GregW66 On 03/14/2018 At 12:55:38 PM
I got a tip on Facebook that Grandt Line is closing. Hoping to get the word out so someone might pick their line up.
Larena's Railroad Hotel
Posted by Adamantish On 03/12/2018 At 10:15:15 AM
Hi everyone. I intend to build this kit as my first craftsman kit. It doesn't look too complicated from a construction standpoint. I went to a local train show this past weekend looking for some kits under $20 and picked up this Muir Models kit. I have no idea how old it is. 1980? 1970? I did a quick box check before I bought it and all of the major wall pieces were still in a sealed bag. Somehow, I neglected to notice the instructions are missing. Oops. I don't suppose anyone has this kit in their collection, or maybe you've built it, and could share some photos of the instructions or completed kit? I think I can build it with or without the instruction but I'm sure they'd be helpful.

One of the reasons I think it's buildable without the instructions, all the walls, windows and door openings are pre-scribed. The biggest challenge will be figuring out where the small bundle of strip wood goes. I got all of the walls cut out yesterday.

I'm thinking about mocking up a dormer on the front left, and maybe 2 on the back. If this is a hotel it seems like it should have more usable space on the second floor.

I'll post more photos as I move it along.

Photos of my favorite builds
Posted by Graffen On 03/09/2018 At 2:44:33 PM
Some of my favorite builds in HO/HOn3.

Coach in HOn3

Combine in HOn3

Caboose in HOn3

Boxcar HOn3

Paper model scratchbuilt.

Miller & sons diorama.

Station close up.


20 t Shay in HO

Bi-level station

Gas station

Leadville building in HO

Modified Lindbergh tug in HO

Weathered brass C-19 in HOn3

FSM engine house for HOn3

Scratchbuilt paper model in HO

Roundhouse for HOn3

Sierra Hotel in HO

Detailed and weathered Swedish Sb locomotive in HO. (Tenshodo)

Drugstore in HO

Store in HO

Auhagen building

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 Posted By: vora59 
can any body help
Im trying to locate the narrow gauge
convention LOGOs
from the earlist till about 2010
Signed: 11/7/2016 6:19:34 AM
 Posted By: Piotr Bein 
I tried to post this after registering yesterday, trying again to be sure as I believe the topic is important...

If someone is still looking for a link to some of Tom Beaton's work:

I talked to him last weekend at a show in Chilliwack, BC. He has a folio with his published articles (technical details and drawings) and lots of pics of his work (mostly in other people's hands). I asked if he would like to have it scanned and placed on the net by volunteers. Am not sure if he got the intention but refused, stressing his dislike for computers.

This would be w worthwhile project for the modelling community. If you need me, contact form is on my blog:
right-hand menu just above the internal search button.
Signed: 10/18/2016 12:09:51 PM
 Posted By: Fred Cotterell 
I am having trouble logging in. I love the forum and would love to get involved again
Signed: 9/12/2016 7:46:27 AM
 Posted By: mduke 
I'm looking for a company that can fabricate very small furniture. Specifically, I'm looking for tiny rocking chairs and benches for a model building I'm working on. Can anyone suggest a company? Chairs need to be about 3/4 in tall and 1/4 in wide. Thanks in advance for any suggestions.
Signed: 8/3/2016 2:30:05 PM
 Posted By: Shana Silvestri 
This message is for Arizona Dave who posted this last Nov regarding the passing of a Verne Niner:http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=46361
I have inadvertently stumbled across an item of Verne's family (I suspect) that I would like some help confirming if they intentionally donated it (I found it at a goodwill store).If possible get it returned...however right now it is still at the store. It is quite personal so I am not going to mention what it is, however I would greatly appreciate help in the ASAP. I may be contacted ssilvestri@live.com. Shana
Signed: 7/8/2016 12:33:35 PM
 Posted By: Gary Cosby 
I am searching for Ron Hatchs track plan for hisFulton County narrow gauge layout hon3 A pencil skech will do . Thank you . Gary

Signed: 4/22/2016 5:49:45 PM
 Posted By: tommytrains 
Trying to get involved on the RR Line Forum and I am unable to post photos. Did fine some info about how to do it, but keep getting error messages....HELP ! Is there a file size limit, ?, etc. but mine are all small...
Signed: 4/17/2016 1:37:15 PM
 Posted By: Ron 
I model in HO steam era. MA & PA RR. Delta, PA
Signed: 4/11/2016 9:43:15 PM
 Posted By: pierce carlson 
what is missing?
Signed: 3/8/2016 11:03:49 AM
 Posted By: jon winder 
Signed: 2/23/2016 3:21:09 PM
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