SecondSun:
Your snide comment about how I am going to destroy the arduino without any explanation is by far the least productive thing in this entire thread.
You are right, it has, until now, been completely unproductive. That was post #3. Here we are 15 posts later and only now, after several repeat prompts, are you finally asking what I meant. Like many forum members, I am fed up with writing long explanations only to have them ignored. So I posted a short and hopefully provoking post to see what reaction it got. Then I could judge the level of attention the OP was going to give the thread they started. All too often, newbies give up as soon as they realise electronics, as a hobby, takes concentration, determination and willingness to learn.
So, still interested to find out why you are damaging the Nano and/or matrix?