A 7-segment display is a type of electronic display that uses seven individual light segments to show numbers. These segments can be made from LEDs, LCDs, or other technologies. By selectively turning on or off these segments, the display can show digits from 0 to 9 and sometimes even letters or symbols. They are commonly used in digital clocks, calculators, and other devices that need to display numbers.

A 3D printer is a device that creates three-dimensional objects by depositing successive layers of material, such as PLA, based on a digital model.

A water level indicator is a device used to measure and display the level of water in a tank or reservoir. It typically uses sensors to detect the water level and provides real-time information, often through visual indicators like LEDs or digital displays. This helps in monitoring water usage and preventing overflows or dry runs.

The Sea Perch ROV (Remotely Operated Vehicle) is an underwater robot designed for educational purposes. It is a hands-on project that introduces students to the basics of marine engineering and robotics. Developed by MIT Sea Grant, the Sea Perch kit includes all necessary parts and instructions to build a submersible vehicle capable of maneuvering underwater, performing tasks, and collecting data.

LED glow is the steady, bright illumination from an LED (light-emitting diode). It uses electricity to produce various colors, unlike bulbs that heat up. LED glow is energy-efficient and long-lasting, making it popular for displays, lighting, and decoration.