What happens when you type google.com into your browser’s address box and press enter?
Literally, what happens? The question is answered in as much detail as possible.
The “enter” key bottoms out
To pick a zero point, let’s choose the enter key on the keyboard hitting the bottom of its range. At this point, an electrical circuit specific to the enter key is closed (either directly or capacitively). This allows a small amount of current to flow into the logic circuitry of the keyboard…
More than you wanted to know.