Im trying to build an automatic fan controller for a psu project im working on. Im trying to build a circuit to control a 24vdc brushless fan with pwm signal from a pic18f4520, the fan draws 1a of current at full speed. At89s51 is the microcontroller used here and l293 forms the motor driver. Temperature controlled fan speed projects of 8051 avr pic.
The sensor lm35 or lm34 should be kept inside a closedend metallic tube. Simple temperature controlled dc fan circuit diagram. This project will display the configuration, development, advancement, control and assessment of an automatic switching speed electric fan. Temperature controlled fan report slideshare temperature controlled fan regulator electronic circuits, 33 thoughts on temperature controlled fan regulator siddhu march 12, 2015 at 7. May 16, 20 8051 temperature controller using ds1820 and lcd display 1. Automatic fan speed control system using microcontroller. Interface lm35 temperature sensor with 8051 at89c51.
Find out all our information on 8051 based temperature controlled fan here. Circuit diagram construction and working this circuit constructed with arduino uno board as a main part and lm35 as a temperature sensor. Construction of a temperature controlled fan using a. The block diagram includes power supply, rst circuit, 8051 microcontroller, lm35 temperature sensor, 8 bit adc, l293d motor driver, dc motor, 7segment display, ip switches. Temperature controlled fans for gas fireplace equivalent transistors and speed control issues. For processing analog signals, microcontroller has analog to digital converter which converts analog signals to digital ones.
Temperature controlled fan using 8051 microcontroller elprocus. Temperature controlled dc fan using microcontroller ethesis. The system is fully controlled by the microcontroller at89s52. This simple project interface lm35 which is a very common temperature sensor giving high precision reading in terms of analog voltage with most popular 8051 microcontroller at89c51. It is accomplished by the data communications between arduino, lcd, dht11 sensor module and dc fan that is controlled by using pwm. Keywords humidity sensor, 8051 microcontroller, air cooler, lcd. This project describes a bidirectional dc motor that changes its direction automatically after a preset amount of time around 1s. A temperature controlled dc fan is a system which automatically turns on a dc fan when the ambient temperature increases above a certain limit. This project is used to control the fan speed according to the temperature and it also indicates the temperature. Ill be using a resistive temperature sensor, or an lm35. First, the original 8051 microcontroller is discussed, followed by the enhanced features of the 8032, and the 8 0c515. A well designed 8051 dc motor system has essentially two parts.
The proposed system temperature controlled fan using microcontroller is used to control the speed of the. In this circuit, pin 3 noninverting terminal of op amp 741 is connected with the potentiometer and pin 2 inverting terminal is connected in between of r2 and rt1 thermistor which is making a voltage divider circuit. So this heat should be reduced in order to protect the device. The circuit consists of four switches, in which two buttons are used to increment and decrement the high limit temperature value and the other two buttons are used to increment and decrement the low limit temperature value. Android controlled robot 8051 microcontroller, android controlled robot using 8051 and bluetoothour.
In this project user can use switches to controll speed of ac motor and led display is provided to show the current speed. Washing machine control interfacing with 8051 micro controller the io can be configured as input pin or output pin bitly. Figure 4a and 4b shows the lowside and highside configurations. Aug 15, 2017 temperature controlled dc fan using atmega8 microcontroller circuit diagram circuit principle the main principle of the circuit is to switch on the fan connected to dc motor when the temperature is greater than a threshold value. Oct 29, 2018 pwm based dc motor speed control using microcontroller circuit principle the heart of this project is the 8051 microcontroller.
So, in this article let us discuss about interfacing dc motor with 8051 microcontroller. Arduino uno is the heart of this project and a l293d driver ic is used to drive the dc fanmotor components required. Power supply for this circuit is given by a step down transformer. The idea was to use some kind of comparator or schmitt trigger to trigger the fan to go on at certain. Are you interested to get detailed information about the working and applications of this project. Speed control of dc motor using microcontrollers authorstream. Sample code for dc motor pwm pulse width modulation. For example, consider the dc motor whose speed or direction of rotation of dc motor can be controlled using programming techniques which can be achieved by interfacing with 8051 microcontroller. Professor, techno india college of technology, newtown, mega city, rajarhat.
I want to design an automatic temperature controller using an 8051. The lm35 gives 10mv for each 1c change in the temperature. Temperature based speed control of fan using microcontroller 1. The circuit is very simple and using only five components. Here we are designing a circuit which automatically switch on the fan when the temperature inside the device becomes more than the threshold value. Firstly an 8051 with the required software to control the motor and secondly a suitable driver circuit.
Included in the programmable counter array are a 16 bit free running timer and 5 separate modules. Relay or transistor circuit can be provided to control speed of dc fan. These are the nonmicrocontroller based projects that can be further implemented by using atmel 8051 microcontroller, and also by using zigbee as wireless communication for monitoring the temperature in remote areas. Everything you wanted to know about 8051 based temperature controlled fan but were afraid to ask. With this you can send pulses in a pwm method look it up to control the high voltage side of the fan and even the light using one optocoupler circuit for each. The mcu is an arduino uno, which is powered using a 12v power source. Temperature controller using 8051 all about circuits. Temperature controlled fan using 8051 microcontroller pic.
Temperature control fan using 8051 microcontroller slideshare. Sensor output will be amplified and given to an adc, that to the uc. Nov 22, 2016 microcontroller are widely used in electronics gadget and are one of the key element in developing any project and thus this project used 8051 microcontroller and will help in teaching about interfacing of temperature sensor with atmel microcontroller by means of adc, to display the temperature on a 16. Microcontroller for variable speed bldc fan control system. Temperature controlled fan speed projects of 8051 avr.
Temperature based speed control of fan using microcontroller. Vref and avcc for the adc are applied externally to the microcontroller. Mar 07, 2014 temperature based speed control of fan using microcontroller 1. 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. Temperature monitoring system using 8051 microcontroller. The 8051 microcontroller family architecture the architecture of the 8051 family of microcontrollers is referred to as the mcs 51. Interfacing dc motor with 8051 pwm projects of 8051. For proper user interface visual indication we had also used lcd which indicate temperature as well as speed of fan. The dc voltage across the fan is adjusted by using a traditional linear regulator. You can use this circuit in many electronic projects, which require a cooling fan. Power supply for microcontrollerbased temperature indicator. Dc motor interfacing with 8051 microcontroller using l293d. Temperature controlled dc motor using microcontroller. The circuit mainly consists of atmega8 microcontroller.
As the name implies the main purpose of this project is to devise a system whose sole purpose is to condition or maintain the temperature within the predefined limits. First the dc voltage is stepped up using a boost converter to a much higher voltage. Temperature controlled fan using arduino hobby project. The on chip flash allows the program memory to be reprogrammed in. Motor driver ic used for interfacing dc motor with 8051.
The circuit mainly consists of an atmega8 microcontroller, temperature sensor, dc motor and driver ic. In this arduino based project, we are going to control dc fan speed according to the room temperature and show these parameter changes on a 16x2 lcd display. The automatic fan controller system using the 8051 family microcontroller, it is the 8bit microcomputer has consisted 4k bytes of flash memory, timerscounters, 256bytes of ram memory and a serial communication. Circuit of microcontrollerbased dc motor speed controller d c motor speed controllers are very useful for controlling the motion of robotic and industrial automation systems. Dht22 sensor is used to sense the room temperature and then we adjust speed of a dc fanmotor accordingly using pwm pulse width modulation. This project was done for minor project in which i was a part of the team. This article shows how to interface a dc motor to an 8051 microcontroller. Temperature controlled dc fan electronic circuits, description. Temperaturebased fan control using the maxq2000 microcontroller sep 16, 2005 abstract. The main principle of this circuit is to take the analog temperature values, convert them into digital values and display the digital temperature value om lcd or 7segment display. Speed control of dc motor using microcontrollers authorstream presentation.
Here is a simple circuit based on two transistors that can be used to control the speed of a 12 v dc fan depending on the temperature. Interfacing dc motor to 8051 forms an essential part in designing embedded robotic projects. Jun 02, 2007 this project is used to control the fan speed according to the temperature and it also indicates the temperature. Washing machine control interfacing with 8051 micro controller. Three level pwm dcac inverter using a microcontroller. The major problem in this method is the heat dissipation of the passive component and the narrower controllable speed range. Temperature controlled fan using arduino engineering.
Design and fabrication of temperature based dc fan speed. Pwm based dc motor speed control using microcontroller. 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. The t89c51ac2 is an 8bit microcontroller based on the 8051 architecture. Lm35 gives analog reading and microcontroller process digital data so we have to use a midway converter from analog to digital i. The system will get the temperature from the ic ds1820 and it will control the speed according the values stored by the user. Single phase ac motor speed controller with project report. A well designed 8051dc motor system has essentially two parts. Temperature controlled fan using 8051 microcontroller. The main principle of the circuit is to switch on the fan connected to dc motor when the temperature is greater than a threshold value. Interfacing of humidity sensor u sing 8051 microcontroller.
Temperature controlled fan at89s52 free microcontroller. The architecture of the 8051 family of the microcontrollers is presented in this chapter. The block diagram of the temperature controlled fan using microcontroller is shown in the above figure. Assembly code for dc motor pwm pulse width modulation. Ac incoming voltage is 230v 50hz is step downed to 15v ac using a step down transformer. 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. The projects are good example of embedded system basically designed using closedlooped feedback control system. Temperature controlled dc fan electronic circuits and. Here we are going to make a temperature controlled dc fan.
I want to start off by apologizing for my bad english its not my first language. Pin 20 and 21 are aref and avcc pins connected to the supply voltage of 5v. Introduction in this project we are using lm35 series analog temperature sensor. As soon as the power supply is switched on, the dc motor starts gaining speed and if you. Temperature control fan using 8051 microcontroller. It uses the input from two precise dht22 based temperature sensors. Hello, im working on a small project at home and want to see if anyone can give me some ideas. When the dc motor is switched on, it takes certain time to reach the full speed. Following code can be using for 8051 and 8052 ics like. It can drive 2 dc motors and we can also control the speed by providing pwm signals. Apr 03, 2016 share on tumblr speed of fan can be varied by changing the input supply, if w need to change the fan speed depends on temperature changes means we can implement the following application note with arduino and temperature sensor lm 35. May 30, 2014 these are the non microcontroller based projects that can be further implemented by using atmel 8051 microcontroller, and also by using zigbee as wireless communication for monitoring the temperature in remote areas. In this circuit, the lm35 temperature sensor will give continuous analog output corresponding to the temperature sensed by it.
The main components of this temp control fan circuit is a negative temperature coefficient thermistor ntc which detects the temperature, a comparator which is used to compare the preset temperature value and a relay circuit to drive the fan. Temperature controlled fan using arduino engineering projects. The speed of the dc or bldc fan can be changed by the applied voltage across the fan. Xbee based remote temperature monitoring for transformer. Microcontrollerbased dc motor speed controller kumar fig. If you want to control this with a 5v micro signal you first need to use an optocoupler look it up. Another method involves first transforming the dc source to ac at low voltage levels and then stepping up. 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. Pwm is a technique by using which we can control voltage. The circuit shown in the figure consists of a microcontroller,lcd,optocoupler,temperature sensor,adc etc.
Temperature controlled dc fan using microcontroller project. Interface lm35 temperature sensor with 8051 at89c51 brave. Which type of fan can be controlled using this project. The simulation results of the fan speed control system using pwm technique. The fan controller described on this project page, controls one or more pwm controlled 12v pc fans. Temperature controlled dc fan using microcontroller project posted june 30 2014 12. Temperature monitoring system using 8051 microcontroller and. This high voltage dc source is then transformed into an ac signal using pulse width modulation. Working of temperature controlled dc fan using thermistor. Controlling dc fan with pwm electronics forum circuits. When the fan is operating in the zero or full speed, the passive. Automatic fan controller for air conditioning system.
Temperature controlled fan electronic voting machine search by components. Threelevel pwm dc ac inverter using a microcontroller oliver rich william chapman mqp terms abc 20112012 advisor. Aug 02, 2012 this article shows how to interface a dc motor to an 8051 microcontroller. And then write a fan motor speed control program for the microcontroller by using the principles of pwm using dc micro controller 8051. To control the speed of the dc motor, you need a variablevoltage dc power source. Temperature controlled dc fan using microcontroller youtube. Programming and interfacing the 8051 microcontroller in c. You dont want the high voltage in anyway getting back into the micro circuitry. This simple temperature controlled dc fan circuit can be used to control any 12 volt 1a dc fan by activating it on a preset temperature.
Share on tumblr speed of fan can be varied by changing the input supply, if w need to change the fan speed depends on temperature changes means we can implement the following application note with arduino and temperature sensor lm 35. Sensor lm35 and lm34 are precision integratedcircuit temperature sensors, whose output voltage is linearly proportional to the centigrade and fahrenheit temperature values, respectively. If you have worked with any variant of the 8051 microcontroller, you might remember that 8051 doesnt have a dedicated pwm circuitry to enable pwm mode. Mar 05, 20 this is a simple automatic temperature controlled fan circuit using ntc thermistor. Automatic temperature controlled fan circuit using thermistor.
Temperature controlled dc fan using microcontroller. It is an enhanced version of the 89c51and incorporates many new features including the programmable counter array pca. Hi everyone,today i am gonna share a project entitled temperature controlled automatic air conditioning system. In the program we have set four different conditions to run the dc fan. Temperature controlled dc motor using microcontroller eeweb. Interfacing dc motor to 8051 microcontroller using at89s51. This is a simple automatic temperature controlled fan circuit using ntc thermistor.
Temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. Single phase ac motor speed controller project will explain you what exactly is needed to make control a real world device using our well known 8051 microcontroller. Pwm based dc motor speed control using microcontroller circuit principle the heart of this project is the 8051 microcontroller. Temperature controlled fan using micro controller 8051. If the temperature is less than 25c, then the dc fan will remain off and details will be displayed on the lcd. Thus user can use fan operating on 12 volt cpu fan. Temperature controlled dc fan using atmega8 microcontroller. The main components of the project are 8051 microcontroller, 16. Temperature controlled dc fan using microcontroller august 15, 2017 by administrator 47 comments a temperature controlled dc fan is a system which automatically turns on a dc fan when the ambient temperature increases above a certain limit. The project temperature controlled fan using arduino is simply fabricated around arduino uno board and temperature sensor lm35.