I'm trying to understand exactly how a resistor can "pull up" on voltage? For that matter, a "pull down" resistor only underscores the fact that neither pull-up or pull-down resistors do anything. They are just their to prevent a short.
Why are they called "Pull-up" and "Pull-down" resistors, and how can Ohm's law prove they are useful for anything other than preventing a short to Ground?
I've looked high and low for a real answer on this, bought books, and more. Will someone *please* explain this so my new-to-electronics mind can understand this.
Why are they called "Pull-up" and "Pull-down" resistors, and how can Ohm's law prove they are useful for anything other than preventing a short to Ground?
I've looked high and low for a real answer on this, bought books, and more. Will someone *please* explain this so my new-to-electronics mind can understand this.