<![CDATA[This study aims to design hardware and software that can be applied to thermoelectric coolers, by designing a tool used for air conditioning systems using a Thermoelectric Cooler (TEC). temperature reduction changes are achieved more quickly and are able to maintain temperature stability. This device controller uses Arduino Mega2560, NTC as the temperature sensor and relay as the actuator. The way this tool works is to enter the desired setpoint, the temperature response is going well, the box room temperature obtained by the ntc sensor is 23°C in 50 minutes. If the temperature setpoint is set to 23°C, the relay triggers all 12 volt voltages on the thermoelectric, can work according to the set point that has been set in the program, namely: if the set point is 23 then the relay will gradually work and slowly trigger a 12 volt voltage on the thermoelectric. The relay used to control the thermoelectric voltage can work well. The relay is activated if the box temperature is below 23°C the thermoelectric will turn off. If the box temperature is stable at 23°C then thermoelectrics 4,5 and 6 are on and maintain the box temperature with a set point of 23°C. ]]>
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