AI | Technology on Instagram: "This simple DIY laser tripwire uses a Raspberry Pi and an optical sensor to protect computer privacy. A thin laser beam is set across the desk, and the moment someone crosses it, the system detects the break and instantly triggers a preset action like locking the screen or hiding what is being displayed. It is a clever example of how low cost electronics can add an extra layer of privacy in shared spaces, offices, or public work environments without directly intera