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Uuhh, tried that...after you pointed it out :-) <br />But using various combinations of key word searches It didn't find what I was looking for... <br />An item in MR several years back on how to use a single pole rotary switch, +/- power supplies, pull-up resistors and diodes for a simple yard throat turnout matrix for operating tortoise machines. i know how to do it, I was just looking for the official article in print.
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