I am extremely grateful that OGR has given us the Electrical Forum. I also want to thank all of the experts for their expertise and quick responses to the posts on the Electrical Forum.
As a retired mechanical engineer, my knowledge of electronics is very limited. When it comes to the know-how of using components, I am plain dumb but that's changing. Inspired by the education I have been getting from this forum, I bought a breadboard, assortments of LEDs, resistors and some relays to experiment with. Also on the way are assortments of capacitors and diodes.
So the next time I see a post from one of the wizards who lurk on this forum, I will be trying their circuits. What I learn from playing with the breadboard will cross-deck to my layout.
Please keep the questions and answers flowing so dummies like me can continue to learn some things that will be useful on our layouts and trains.
Oh by the way, I have some computer drawing skills, so I will volunteer to draw circuits for the experts to aide in explaining their posts. Send me an email.