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Help guys! I need ideas! Here's the basic concept. I have a microscope whose stage is controlled by twisting two knobs. The knobs that need twisting are on the bottom and left side of the image. There is little resistance when turning the knobs by hand. It's just... tedious. Supposedly...

I'm in the process of assembling something and I want to double-check with you all to determine if this is the best way to do such a thing. I have a 2-position switch (with 3 prongs similar to this but much much smaller). I want to detect the position of the switch with a single picaxe input...