DIY Arduino Alt Tab contraption

For Alt Tabbing when your hands are full.

Anyone who’s ever looked at something on a computer that they didn’t want to get caught looking at knows the Alt Tab shortcut, but instead of using the keyboard for this switch program command, one Reddit user, Marc_Victor, has designed an Arduino contraption that’ll do it for him. The Arduino-based proximity sensor connects a bedroom door trigger to a keyboard, allowing it to automatically pull up a file index folder in front of whatever was on screen.