eli5: if input pins are in a high impedance state when no voltage is supplied, how is that equivalent to having a LARGE SERIES RESISTOR in front of the pin?

Question

Wouldn’t the hypothetical large series resistor make it harder for current to flow through? Or is it because the pins can still change states even with the very little hypothetical current they get? I don’t know my own confusion lol.

In: 1

Answer 1

>Wouldn’t the hypothetical large series resistor make it harder for current to flow through?

Yes. Which is exactly what you want.
Input pins measure the *voltage*, not the current.

You want to have as little current flow as possible, as that is just wasted energy and extra heat you have to deal with.