Retired software engineer, with 50+ years of professional experience in many languages (IBM assembler, APL, COBOL, FORTRAN, Pascal, Delphi, LISP, Prolog, C, C++, C#, Node.js+JavaScript, to mention a few). I am now exploring robotics, using Raspberry for the logic + Arduino for driving the hardware. I started with the Raspi only, but I soon discovered its multitasking nature made it unsuited for smoothly driving a stepper motor. So now I am climbing the Arduino learning curve.