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Originally Posted by Army
I'm glad the deleted post is back - keep up the good work funola...
With these tiny voltages though an amplifier would be handy to notice smaller differences if there were any. I don't suppose you've got a digital voltmeter with a graphing function?
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Amplifier? Did you mean a DVM with higher resolution? My DVM goes to 3 decimal places (milli-volt), a DVM good to 4 or 5 decimal places will see smaller differences. No graphing function on mine.
I'll be taking an 80 mile drive today and will collect more data.