Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [model-railroad]

The tag has no usage guidance.

0
votes
1answer
89 views

Zener diode question in simple LED circuit with anti-flicker for model railroad

I am a total novice when it comes to electronics. I had a simple circuits class 30 years ago as a software undergrad. I've designed a simple LED lighting circuit for N-scale model railroad, to be ...
0
votes
1answer
61 views

Need help determining smoothing capacitor(s) for rectifier

I am making a rectifier for a single N-Scale train building. It takes DC, but the train controller gives out 19VAC. I have 4 1N4001s and some capacitors, but probably not the right size/uf. I only ...
2
votes
2answers
1k views

LED color changing circuit using power cycle

I'm trying to design an LED circuit for a model that will allow me to change the color of a bi-color LED each time the power is cycled. In other words: Power off: Nothing Power on: Green Power off:...
5
votes
1answer
583 views

Drawn out question in regards to DC power to battery backup

Story: I have a lego train that is modded to run off of a 9v train track rail system that was a control function of 0 to 9 volts when fully on. LEGO does not make the motors that can run on these ...
2
votes
2answers
731 views

Motor Control System for LGB Trains

I am currently experimenting with some motor control circuitry for my garden train. I have spent several time trying to read up on the basics of motor control, and I have also done some prototyping. I ...
3
votes
2answers
2k views

Converting 12VDC to 1.5VDC

How do I convert 12vdc to 1.5vdc for flashing mini-lights on my HO Scale Railroad system? The flasher will drive 2 alternately flashing bulbs (1.5 volts each) The maximum output of flasher is 100mA @ ...
7
votes
1answer
5k views

How to re-magnetize a permenent magnet motor of small size (model railroad)?

I have several small DC motors where if I place an extra magnet to back-up the included magnet, the performance seems to improve significantly. These motors are 30-40 years old & their ...
14
votes
3answers
1k views

What is a good approach to detecting distance and speed in model railroads?

Up front I must admit to little hands-on knowledge of modern microcontrollers and their software - I know power engineering and big motors much better (45 years of it). Now, my question: Trying to ...
7
votes
3answers
4k views

Adding capacitor to model railway 12V motor to keep it going over a dead spot

I have read that you can add a capacitor to a model loco to keep it going over a dead spot on the track - not DCC - just DC. Is this accurate? On one forum someone has been experimenting with 2000mF ...
1
vote
2answers
1k views

Can I control a model train with a lighting dimmer pack?

I have an O-scale 3-rail track model train. I would like to be able to control this with a computer. The normal model train transformer/controller goes from 0VAC at "stop" to 18VAC at "full speed". ...