Automatic Room Temperature Control System

The automatic room heater control system comprises of three 3 main subsystems.

Automatic room temperature control system.

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. Download full size image fig. 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.

Precession accuracy and high efficiency are obtainable. Pic 18f45k22 is the brain of this automatic temperature controller system. The project maintains the temperature of a room in 20 25 degree celsius. It uses lm35 temperature sensor to measure temperature.

The following are the advantages of automatic control system. The temperature sensor lm35 is very accurate whose output is directly proportional to its surrounding temperature. For every 1 c of rise fall in temperature the output voltage of the sensor varies by 10mv. The circuit present the design construction development and control of automatic switching electric fan and also automatic control of temperature of heater.

Dedicated control over room temperature is not only a key issue in providing work conditions that ensure employee satisfaction and hence increased work output. Automatic control system is economical. Contents problem statement introduction methodology circuit diagram components applications conclusion references 2. Power supply unit the sensor unit and the control switching unit as shown in the system block diagram in fig.

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. Automatic room temperature controller. The idea is based on the problem occurs in human s life now a days by improving the existing technology. The microcontroller 8051 based automatic fan system is applied to upgrade the.

Dc motor as its main output blocks and the potentiometer and temperature sensor tmp36 as the input control. Download high res image 136kb download. Other temperature control devices the final control devices are contactors blowers electric motor or pneumatically operated dampers and valves motor operated variacs time proportioning or phase fired scr s and saturable core reactors. Automatic room temperature control 1.

It is now a health and safety issue. Human errors are avoided. Use of automatic temperature controller. The diagram for a generalized automatic temperature control system is shown in figure 1 2.