Abstract: “The system is designed to improve the efficiency of a typical household air conditioner by managing the speed. As there are many causes that produce high electricity bill consumption, one of the main causes is due to the inrush current and high torque. This paper defines the use of an induction motor of a compressor and the use of VFD (Variable Frequency Drive) which will control the incoming frequency and convert it to produce user’s desired frequency; this will be achieved through a temperature controller. The temperature controller uses a PID (Proportional Integral Deferential) which has been implemented on an Arduino. The PID helps the data to be received with minimum errors and reaches its desired temperature gradually; this makes it more efficient and effective. It helps the user to set its own desired temperature which achieves the set temperature by taking care of the overshoots. The product is designed to be cost efficient, easy handling and will work as an Add-On to make it c”

Keywords: PID controlling; Automation, Efficiency