Air Conditioner Controller :: essays research papers

1. designToday, thanks to the advancement in the field of electronics, most of the manually controlled systems are getting replaced with sophisticated electronic circuits with intelligent controlls. These circuits are capable of monitoring, analyzing and imperious the systems. In earlier days these electronic circuits were fabricated around trenchant hardware components such as transistors, logic ICs etc that made the system immense and costly. Also since the component count was more the failure rate was as well as more. But now due to the introduction of single chip microcontrollers, the hardware part was drastically reduced so also the cost and size of it of the hardware has come down to a large extent. As a result almost all of the control circuits are designed all over single chip microcontrollers.2.     SCOPE OF THE PROJECTThe primary objective of this leap out is to make a simple circuitry for Air conditioner controller. This circuitry is based on the situate of the art technology of Microcontrollers .The features of the nominate is has given below1.     Facility to congeal the temperature using a potentiometer.2.     A divulge indicates the temperature both the personate jimmy and the actual value.3.     An indication when the correct range is beyond limits.4.     The system turns ON the Air conditioner when the set temperature.5.     A mode studyor switch is provided to select between SET MODE and RUN MODE.6.     When the SET mode is selected the bring out indicates the set value. When RUN mode is selected the display indicates the actual room temperature.The undivided circuitry works on 230V AC. From this a serial publication regulator is designed to come down +5V regulated supply for the microcontroller part. The circuitry is based on the popular microcontroller Atmel 89S8252 The project con sists of obligatory software and hardware for implementing the above function.3.     BLOCK SCHEMATIC OF THE PROJECTThe range below shows the block schematic of the project. This consists of the pursual.1.     Power Supply unit of measurement2.     Microcontroller Unit3.     A Potentiometer For Temperature Set.4.     A Temperature Sensor Circuit5.     A Display Circuit6.     A Relay Driver CircuitIt also consists of the following indications1. Temperature Display on seven segment Display (2 digit)2. A set range out indication.The circuit turns on a relay when the set temperature is less than the room temperature. This relay turns ON the Air Conditioner.4.     STUDY OF MICROCONTROLLERThis project makes use of a microcontroller-based circuitry for decision making such as discussion checking and device control. The microcont roller used here is microchip make PIC series IC 16F870.a. Microprocessors     A microprocessor, as the term has come to be known, is a general- purpose digital computer central processing unit (CPU).