A thermoelectric generator (TEG) is a device that converts heat directly into electricity using the Seebeck effect. This effect occurs when there is a temperature difference between two different materials, generating a voltage. TEGs are often used in applications where waste heat is available, such as in industrial processes or automotive systems. These generators are compact and can operate without moving parts, making them reliable and low-maintenance. They are commonly used in remote power generation, such as in space missions or for powering sensors in hard-to-reach locations. Overall, TEGs offer a sustainable way to harness energy from heat.