I want to be able to apply both 12 and 24VDC to an input pin though a switch. I'm switching to ground/0V. Using a couple of resistor as a voltage divider, I have the following questions: do I need a resistor between the Arduino pin and the voltage divider as well ? what is the input pin impedanc…

12 to 24V input

fiddler September 25, 2012, 9:53pm 3

Okay, I haven't posted a pic or file before, but here we go

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