Artificial Intelligence & AI Technology on Instagram: "This simple DIY laser tripwire turns a Raspberry Pi into a privacy guard. 🔴💻 A narrow beam of light stretches across your desk. The moment someone breaks it, an optical sensor detects the interruption and instantly triggers a preset action locking your screen or hiding what’s on display. No software installed. No touching the computer itself. Just low-cost electronics quietly protect your privacy in shared spaces, offices, or public work e