Hi!

I'm back on this and I'm going to try and build an Arduino Nano version of that controller you link to, Thomas. 

Three questions: 
The Git-page says that homing on switches is to be developed. So how does it work then, it does not start by identifying the sensors? Just assuming the mount is in CWD position (like a Losmandy Gemini does)? Or how?

What driver do you use here - not the Celestron Aux but the Celestron Nextstar?

In the schematics, there is  a diod. Does the specs for that diod matter?

Magnus

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