Automatic Room Temperature Control System

Problem statement todays world is affected by a phenomenon of global warming due to which the temperature is rising which makes the human lives uneasy.

Automatic room temperature control system.

Contents problem statement introduction methodology circuit diagram components applications conclusion references 2. Advantages of automatic room temperature control. For every 1 c of rise fall in temperature the output voltage of the sensor varies by 10mv. Download high res image 136kb download.

Automatic room temperature controller. The user enters the reference temperature by keypad and then the microcontroller turn on and off the heater or cooler when the temperature is too hot or too cold. Dc motor as its main output blocks and the potentiometer and temperature sensor tmp36 as the input control. It uses lm35 temperature sensor to measure temperature.

Dedicated control over room temperature is not only a key issue in providing work conditions that ensure employee satisfaction and hence increased work output. The circuit present the design construction development and control of automatic switching electric fan and also automatic control of temperature of heater. The project maintains the temperature of a room in 20 25 degree celsius. Precession accuracy and high efficiency are obtainable.

Power supply unit the sensor unit and the control switching unit as shown in the system block diagram in fig. The design considered the flexibility of using a microcontroller pic16f876a along with other peripheral devices such as lm35 temperature sensor lcd display unit to form all encompassing. The automatic room heater control system comprises of three 3 main subsystems. The diagram for a generalized automatic temperature control system is shown in figure 1 2.

The microcontroller 8051 based automatic fan system is applied to upgrade the. The following are the advantages of automatic control system. 2 2 an automatic room temperature control with security system 23 2 3 an avr lm92 temperature sensor system 25 2 4 temperature control system using lm35 26. Automatic room temperature control 1.

Human errors are avoided. The temperature sensor lm35 is very accurate whose output is directly proportional to its surrounding temperature. The idea is based on the problem occurs in human s life now a days by improving the existing technology. Download full size image fig.

Use of automatic temperature controller. At room temperature the output of the sensor would be a stable value. System iterates forever unless it gets terminated by the user due to the behavior of the loop function. Automatic control system is economical.