Temperature Based Fan Speed Controller Using Microcontroller 8051

The microcontroller circuit should also provide an input device which allows turning the motor on and off and selection of dc motor running at 50 75 and 100 of rated speeds.

Temperature based fan speed controller using microcontroller 8051.

Temperature controller can be done by using electronic circuit microprocessor or microcontroller. So you have to use ac fan. But we can provide dc fan as well if you want. This ic l293d is a dual h bridge motor driver used to control the speed and direction of dc motor.

In this circuit the lm35 temperature sensor will give continuous analog output corresponding to the temperature sensed by it. A simple project using microcontroller at89s51 to control the speed of 12v fan according to the surrounding temperature in this project we use the concept of pwm pulse width modulation to increase or decrease the speed of fan. Level one now agian updated temperature is read and is updated in the lcd by update function this process maintains the status in lcd while temperature is changed. Thus user can use fan operating on 12 volt cpu fan.

Can i get pc based temperature controlling. This is to certify that the work in the thesis entitled temperature controlled dc fan using microcontroller by ghana shyam soren bearing roll number 111ee0236 and ram ashish gupta bearing roll number 111ee0211 is a record of an original research work carried out by them under my. Followings are the details of the project. Also the logic to control speed of the fan at the same time is done using pwm.

The working of the project is explained here. The microcontroller controls the dc fan using the ic l293d motor control. I want to control the temperature using the computer desktop. Relay or transistor circuit can be provided to control speed of dc fan.

The speed of the fan can be decided by the temperature examine by the microcontroller. Temperature controlled fan speed projects 8051 description. Temr 25 c fan on speed. Whenever temperature changes fan speed also changes.

The aim of this project is to design a temperature controlled fan using 8051 microcontroller in which the fan is automatically turned on or off according to the temperature. The following code does rotate fan at certain minimum speed. We also interface 2 16 characters lcd which shows the outside temperature through the temperature sensor.