Artificial Intelligence | Tech | Robotics on Instagram: "This simple DIY laser tripwire using a Raspberry Pi and an optical sensor protects your computer privacy. A narrow beam of light is aimed across your desk. The moment someone walks into it, the system detects the interruption and instantly triggers a preset action like locking the screen or hiding what's on display. This small gadget shows how low-cost electronics can be really useful and adaptive. #tech #raspberrypi #cooltech"