Learn AI | Tutorials, News & Future Tech on Instagram: "This device uses a DIY laser tripwire to automatically hide whatever is on your screen the moment someone walks past your desk. No apps, no manual shortcuts, just hardware → detection → action. A small laser transmitter and a USB receiver create a beam in front of your screen. When the beam breaks, the receiver fires a preset keyboard shortcut or script (like minimizing all windows) without the user touching a key. This is a great example o