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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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There are 145 signatures
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 Posted By: Ed 
Just found this site and like all the info that you are generating. I registered and am waiting to hear from the moderator to see if I can get onto this site. Thank you
Signed: 5/2/2013 10:49:24 PM
 Posted By: Dick Winn 
Just starting some semi-serious RR building in On30.
Signed: 2/27/2013 10:32:31 PM
 Posted By: Richard Warren 
I'm not a member of the forum; just a guy that likes trains and loves good modeling. But I spend more time on this website than any other. I wondered if you'd pass this info on to Dave Revelia. He mentioned in a thread that CHB O scale barrels were 'scarce as hen's teeth'. I ran across this listing on ebay and just wanted to share it.


I hope this helps and Dave, your work is absolutely AWESOME! I can look at it for hours.

Best Regards,
Signed: 2/22/2013 2:22:31 PM
 Posted By: Andy Romano 
I invite you all to visit my O Scale 2-rail "Ironbound RR", loosely based on the CNJ in the Ironbound Section of Newark, NJ in the 1950-1960 era. Lots of photos, track plan, etc. See it here:

Signed: 11/18/2012 5:49:50 AM
 Posted By: rob chandler 
Hi All

I took the Canadian Railway Conductor course last Spring and during the course I was having some initial problems learning the various railway signals. Being a computer "nerd" I decided to write an app to help me (it helped at lot).

In case you folks are interested in having a look it's at http://www.rcp.ca/mobile

Thanks a bunch
Signed: 11/16/2012 3:46:23 AM
 Posted By: john elwood 
I am signing in as a guest because I lost all access to the forums due to the recent 10 day loss. Every time I reregister it tells me that my user name and email are already being used and to enter something else. What gives.
Signed: 10/18/2012 8:39:02 PM
 Posted By: Ann 
The picture of Frenchie's Beer Garden store, bar, juke joint and gas station was located in Melrose,LA in the cotton plantation area. The photograph was by Marion Post Wolcott in June 1940
Signed: 10/3/2012 5:27:16 AM
 Posted By: James McClellan 
I own a soap stone quarry in Phoenix VA and know of two others contact me if you would like to see them
Signed: 9/22/2012 9:42:01 AM
 Posted By: Geezer 
Finally got around to signing the book!! How ya all are??

The Geezer!
Signed: 8/22/2012 8:50:25 PM
 Posted By: Thomas Frybarger 
I am From New Holland PA. You know a friend of mine Paul Andrisian who lives in Vermont now. He showed me your web site and I love it.
I have been working on american flyer layout on my second floor for 6 years. Ran out of ideas and space looking for new ideas. Like to see your layout sometime.

Thanks for your time
Thomas Frybarger
Signed: 3/31/2012 9:26:23 PM
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