Space and cost - a nano + driver board can fit in a real small space, weighs little and can attach straight onto the focuser tube with velcro!
There is a UNO+L293D Motor Shield option.
Source code: This topic comes up from time to time. I use VS 2015 Professional with a number of other tools/plug-ins. Not too many people have that. And its get me into all sorts of bother trying to help others re publishing the .exe which I do NOT want to get into at all.
At the moment I am kept busy just answering some of the hardware issues and maintaining the firmware, there aint time for me to do much more than this. At some stage the source code may become available.
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