Artificial Intelligence on Instagram: "The moment someone breaks the invisible boundary, your screen instantly switches to a safe view. This system relies on a physical laser tripwire stretched across a doorway. As soon as the beam is interrupted, it triggers an immediate response, restoring your screen before anyone can read a thing. There’s no webcam tracking, no facial recognition, and no intrusive software involved. Just a laser, an optical sensor, and a microcontroller turning real-world mo