I want to link my Arduino to Processing to make speed modified train sounds on my model railway. I have no problem connecting the Arduino up if the loco is going forward as I can easily adjust the input voltage to suit. The problem I have is when I put the loco in reverse. How do I read this negativ…

reading voltage between +13V and -13V

wvmarle April 24, 2018, 12:35pm 5

How are those things controlled?

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