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As a pure rank amateur in this Arduino field my resources, both hardware and mental are some what limited but doing a bit of googling I found a very simple rotary encoder controller for a stepper motor with a zeroing button action. Seems to be about my level of build construction.
I just want something on the side of the mount so I can tweak the focus between filters without giving the whole system the shakes. This looks ideal. Just need to pick up a rotary encoder, I've got the rest of the hardware. I may tweak it up a bit with some leds to indicate which RGB filter setting it is on once I've figured the rest out.
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