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In many commercial and residential applications, temperature control systems are necessary to maintain optimal thermal conditions, which directly impact the lifespan, energy efficiency, and operational safety of the equipment. The primary goals of this work are to maintain precise temperature regulation while lowering energy usage through the design, implementation, and evaluation of an improved temperature control system. Accurate sensor integration, efficient actuators, and on/off control algorithms are essential elements. Following extensive modeling and real-world testing, the system showed notable gains in maintaining proper temperature levels while consuming the least amount of energy. With the help of an Arduino, a fan, a sensor, and a basic on/off controller, the system effectively regulates room temperature by turning on the fan when temperatures rise and turning it off when ideal circumstances are met. The experimental findings demonstrated the system's capacity to sustain a steady on/off cycle while keeping temperatures within predetermined tolerances, with a fixed point of 40°C and higher and lower limits of 45°C and 35°C, respectively. These variations are depicted in the temperature vs. time graph, which validates the efficacy and efficiency of the system.