Talking Electronics

See Electronics for Model Railways Book 2!
11 pages article with examples and pictures and a table for choosing the most suitable signaling systems with advantages and disadvantages.
Universal signal module that can be used in a number of ways, including 2 and 3 aspect.
Signals that operate, add a high degree of realism to any model railway as well as being something additional for viewers to watch.
It can even provide a simple form of automatic train control by deadening blocks to prevent trains from running into each other.
The modules will drive either the bulbs used in commercial signals or LED's

Board dimensions: 2.9in x 2.9in.