The TEC controller is a thermoelectric module using the Peltier effect. To allow a small range of temperature control using current, this module is based on the Peltier effect, which can adjust the temperature according to the direction of electrical flow. Therefore, how quickly and reliably the TEC controller can control the temperature is of the utmost importance. It is easy and simple to control the Hyvision TEC controller by using a PWM (Pulse Width Modulation) signal which is widely used in DC motors, belts, pumps and other mechanical fields. In addition, a pneumatic heat dissipation method is used to make the size of the product more compact than that of the fan type.