A Peltier module, also known as a thermoelectric cooler (TEC), is an electronic component that helps counter thermal issues in circuits. These unique devices can generate a temperature differential when powered, meaning that one side gets hot while the other side gets cool. The Peltier effect, which is observed when an electrical current passes through the module, is responsible for this phenomenon. The module consists of two ceramic plates separated by semiconductor pellets. When electricity is supplied to the module, one side absorbs heat from its surroundings, causing that side’s ceramic plate to cool down. Simultaneously, the other side’s ceramic plate dissipates the absorbed heat to the external environment, maintaining a temperature difference. Peltier modules find applications in both cooling and heating scenarios. For instance, they can be used to keep high-end processors cool by placing the colder side on processor ICs and directing the hotter side toward an exhaust fan to dissipate heat.