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The board, cross at 90° to minimize capacitance between traces - .3mm for non-power lines, .6mm if carrying power - MK uses a ground plane. - when pressed, short +12V and Reset In - U1-13 (can get at from top when assembled Stop Switch - 10 ohms between U1-14 and U2-1 when off, more like 1M when off Single Step - 12V through 10k Ohms to U-1-14, more like 1M when off Glide In - ~27K to U3-8?

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