I want to hook up multiple buttons on a single analog input. I know there are a lot of tutorials about that, and the one I currently checked is this one: Multiple button inputs using Arduino analog pin « RAYSHOBBY.NET
But there is one thing I do not understand: How can I calculate the ideal resistor for let's say 20 buttons?
For the calculation I would need the current, right?
I know this might sound stupid, but I just checked with a multimeter, a 1.5v battery and some 470k resistors, and the voltage was the same after each resistor (1.598v).
What am I missing here?