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Since this is the first project I have placed on Element 14 I will introduce myself.  I am a retired mechanical engineer who got into electronics when my grandson asked me to build him an airplane several years ago and we put some “avionics” into it.  Of course it turned out looking like something I would have liked to have had myself back in the '50s .     Since that time I have attracted more "customers" and have steadily increased the complexity.  I use ...