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[quote]QUOTE: Originally posted by rrinker You can certainly do it without a computer, but usiang a computer to drive the aspects is FAR easier than constructing an endless series of logic gates to dot he same job. ANd a lot easier to change should you add a new siding, or take one out. Just take a look at the series on APB signals in MR a few years ago, no computer needed. But 4 or 5 logic boards PER PLANT and that was just for APB signals, for realistic signalling you need more than just he APB signals! Cost really isn't a factor either - an older, slower computer is plenty powerful enough to drive a rather large railroad's signals, and they can be had in the free to $100 range - no more expensive, and probably CHEAPER than the parts and circuit boards to do it all in hardware! --Randy [/quote] Randy What is the connection between the PC and the signal? Do they make a board already that you plug or wire into a buss? I know Bruce Chubbs had articles in MR many years ago.
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