The microcontroller controls the speed of an electric fan. Relay or transistor circuit can be provided to control speed of dc fan. In comparison, most ac cooling fan models are available in 115v, a much higher. The combination provides smooth speed control in both clockwise as well as anticlockwise direction. Fan speed controller using lm2941 an authentic resource.
When environment temperature sensed by the sensor crosses the threshold value fan is switched on and temperature is reduced. In this project, implementation of the atmega16 microcontroller for speed control of dc motor fed by a l293d driver circuit has been investigated. I hereby recommend that the project report titled temperature based fan. Dc 12v pwm pc cpu fan temperature control speed controller. This device has been used to control the speed of the dc motor and to control brightness of an. Fan speed control system circuit design this section describes how the speed of fan is controlled by output from microcontroller, with the change in room temperature.
To control the speed of the dc motor, you need a variablevoltage dc power source. I also want to show you that you dont need a big expensive building management system to operate them and with. Manufacturer of ieee 20 project titles arduino msp430 ieee 20 project list, 8051, atmega based electronics projects offered by techgraylogix, mangalore, karnataka. A micro controller based speed control of dc motor using pwm technique is implemented successfully. This is to certify that the work in the thesis entitled temperature controlled dc fan. It can be opened with a threewire fan monitoring function stall warning.
The main components of the project are 8051 microcontroller, 16. So a few weeks ago i introduced pwm as a speed control option for fans. Speed control of dc motor by using pwm technique project is a electronics and electrical engineering final year project. In this project, i will show how speed control of dc motor can be implemented using 555 and pulse width modulation pwm. Speed control of dc motor using pulse width modulation, 555.
The main core of this project is to design a speed control system of dc motor by using microcontroller. Hello friends, in this post we are going to make one simple mini project which is temperature controlled dc fan using a thermistor. This project is an automatic fan speed control and monitoring that controls the. Now, here is the circuit of automatic temperature controlled fan used to control the speed of fan according to change in temperature. This is a good electronic project report on speed control of dc motor using microcontroller by using pwm. Lm35 is a precision integratedcircuit whose output voltage is linearly proportional to celsius centigrade temperature. Fan speed is varied depending upon the increased in temperature. The new control system has a temperature sensor feeding a microcontroller that, by using an optic coupling, diac or triacbased circuit, varies the rms value of the fan motor input voltage and its. Can you mail me the hex file of temperature controlled dc fan using micro controllers project. The circuit of automatic temperature controlled fan is build around temperature transducer ad590 followed by operational amplifier lm324. Design of an automatic fan speed controlling system.
Mar 22, 20 now, here is the circuit of automatic temperature controlled fan used to control the speed of fan according to change in temperature. Nov, 2017 working of temperature controlled dc fan using thermistor. Sep 10, 2014 this circuit automatically switches the fan when it detects the temperature inside the device greater than its threshold value. Speed control for a 12v dc pc fan for magnetic stirrer. It may also be used for monitoring changes in environment. The system will get the temperature sense from thetemperature measuring ic corresponding to which temperature digits are obtained anddisplayed and it will control the speed of fan according the duty cyclepwm valuesstored in a lookup table according to the temperature measured. Automation results into better quality, increased production an reduced costs.
This project is a versatile device that can control dc devices which draw up to a few amps of current. Aug 15, 2017 temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. Description temperature based speed control of dc fan using arduino. The circuit may be used in either 12 or 24 volt systems with only a few minor wiring changes. In this circuit, the temperature sensor used is an ntc thermistor, i.
Pdf nowadays technology is running with time, it completely occupied the life style of. Temperature controlled dc fan using microcontroller core. If the current temperature is greater than the set. A plurality of fans can be used in parallel total current does not exceed 5a, supports automatic temperature control and manumotive speed control, temperature control speed with four temperature zones for setting up, easy to apply in a variety of applications. Todays industries are increasingly demanding process automation in all sectors. The direct current fans, or dc fans, are powered with a potential of fixed value such as the voltage of a battery. This temperature controlled fan circuit is highly efficient as it uses thyristors for power control. Temperature controlled dc fan using atmega8 microcontroller. Project report on speed control of dc motor by using pwm. When the dc motor is switched on, it takes certain time to reach the full speed. In this system, a micro controller is interfaced with a lcd, keypad and dc motor driver. Here we are using temperature sensorlm35 to sense the atmospheric temperature.
I also want to show you that you dont need a big expensive building management system to operate them and with some simple electronics and off the peg. Arduino is at the heart of the circuit as it controls all functions. We are going to make one simple miniproject which is temperature controlled dc fan using thermistor. Circuit diagram construction and working this circuit constructed with arduino uno board as a main part and lm35 as a temperature sensor. Speed control of dc motor using microcontroller by using. Microcontroller based speed control system consist of electronic component, microcontroller and the lcd. The diagram of fan speed control system shown in fig. 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.
Arduino based automatic temperature controlled fan speed. Nov 24, 2016 temperature based fan speed control working. Width modulation is a process in which we measure the frequency of wave in proper or adjusting manner. Automatic temperature controlled fan full circuit diagram. Pdf automatic room temperature controlled fan speed.
Arduino based automatic temperature based fan speed controller arduino. In this project, microcontroller forms the processing part, which firstly senses the temperature and the controller then compares the data with the set temperature. Speed control of dc motor using microcontroller by using pwm. Can be extended to pwm based output, where the speed of the fan can be varied according to the duty cycle of the pwm signal. Circuit diagram for dc motor speed control using pwm. In this project the main intension is to control the fan by heating the sensor, i. The cartoonstyle fan design makes it a good choice for decorating your little lego house as well. This can be used in cpu to reduce the heat and also in home.
Project report in pdf format and in doc word format. This applications are useful in industries, chemical industries etc. Circuit diagram of the temperaturebased fan speed control and monitoring using arduino circuit diagram of the temperature fan speed control and monitoring is shown in fig. Circuit diagram of the temperature based fan speed control and monitoring using arduino circuit diagram of the temperature fan speed control and monitoring is shown in fig. For example, cpu fans, fume extinguishers, toy cars etc. Project report on super sensitive industrial security system. In this project, microcontroller forms the processing. This is compared with the threshold value by the controller which. A temperature controlled dc fan is a system which automatically. Objective of project our object of making this project is for reducing the power consumption. Speed control of dc motor by using pwm technique project.
Speed control of dc motor using pulse wi authorstream. In this mini project we are going to control the speed of. 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. Mar 11, 2017 hello friends, in this post we are going to make one simple mini project which is temperature controlled dc fan using a thermistor. For example, you can typically find 5v, 12v, and 24v versions of dc fans. In general, this changing voltage has sinusoidal shape. I have a temperature sensor ic lm 35, comparator iv 741 opamp, a fan 18v d. Pdf automatic fan speed control system using microcontroller. It is used for displaying different messages on a miniature liquid. Temperature controlled dc fan using thermistor mini project. 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.
This arduino based automatic temperature controlled fan project controls dc fan speed according to the room temperature and show these. An inexpensive, single, small pass transistor can be used here. Temperature controlled fan report linkedin slideshare. This circuit automatically switches the fan when it detects the temperature inside the device greater than its threshold value. In this blog ill explain 010volt control that is typically found on ec fans made by both us at ebmpapst and other companies.
Automatic temperature controlled fan electronics project. Temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. A 12v battery is used to drive the 12v dcoperated fan. Temperature controlled dc fan using microcontroller. Temperature based speed control of dc fan using arduino youtube. Pdf automatic controls play an everincreasing role in a human way of life. Arduino mini are used then rx and tx pins are connected to the external pin of.
Explanation circuit diagram for dc motor speed control using pwm. In contrast, the alternating current fans, or ac fans, are powered with a changing voltage of positive and of equal negative value. The required components are microcontroller, temperature sensor, motor. Speedcontrol techniques in acdc operated bldc applications 1 speed control of bldc motor by toggling the ac mains switch 1. Pwm is a technique by using which we can control voltage. Temperature controlled dc fan electronic circuits and.
Microcontroller based speed control of a dc motor using. Below is the circuit diagram for temperature controlled dc fan using thermistor as temperature sensor. Many electronic circuits related to fan speed controlling have been published here and this one is just another approach. As the temperature of the device increases or decreases, the speed of fan. We have used a triac and firing cirucit in this project.
Temperaturebased fan control is a necessity in a growing number of systems, both to reduce system noise and to improve fan reliability. Speed control of dc motor using pulse width modulation submitted by shakti mohan patnaik063261 abinash padhi063273 ritesh kumar lenka063262 eie, 7th sem under guidance of mr. Its an ideal addon for your pc cooling fans to eliminate produced noise. Fan speed controller using lm2941 electronic circuits and. Temperature controlled dc fan using microcontroller youtube. Sep 09, 20 main objective of this project is to develop a temperature control system which is provide remote system for varying temperature according to requirements. This project will display the configuration, development, advancement, control. Pulse is an attack of voltage, electromagnetic wave, current energy. 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. With this simple circuit you will be able to control the speed of a dc fan according to temperature measured by a temp sensor.
Overall this project can provide higher efficiency and smooth operations control for any industrial plant. Temperature controlled fan speed microtronics technologies. Apr 08, 2018 in this project, i will show how speed control of dc motor can be implemented using 555 and pulse width modulation pwm. Temperature controlled dc fan using microcontroller ethesis. Sensed temperature and fan speed levels are simultaneously. The micro controller is used for controlling the dc motor by producing the pwm pulses. When the temperature increases the base current of q1 bc 547 increases. Using an analog temperature lm35 interfaced to the built in adc of a programmed arduino to develop varying duty cycle of pwm output for a driver ic to run a dc motor automatically according to the sensed temperature at different speed based on the temperature sensed. Temperature based fan speed control and monitoring using. Automatically control the fan speed by sensing the room temperature.
Thus when the temperature of surrounding increases speed of fan also increases and when. We can all so manage the speed of directcurrent motor by using pulse width modulation this circuit is very. As soon as the power supply is switched on, the dc motor starts gaining speed and if you. Synchronisation, speed and direction control of dc motor. Automatic temperature controlled fan using arduino circuit digest. 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. Microcontroller based speed control of a dc motor using pwm. The proposed system is a practical temperature controller used to control the temperature of any device based on its requirement for different industrial applications. Working of temperature controlled dc fan using thermistor.
When the temperature increases the base current of q1 bc 547 increases which in turn decreases the collector voltage of the same transistor. It has four parts, a mini fan, a dc motor, a dc motor driver and a grove cable. Now, i want to use them over to form a circuit capable of controlling my fan speed in proportional to temperature. Shinde krishnat arvind speed control of dc motor using pic. Temperature controlled fan using 8051 microcontroller. This system will be able to control the dc motor speed at desired speed regardless the changes of load. It is accomplished by the data communications between arduino, lcd, dht11 sensor module and dc fan that is controlled by using pwm. And i want to keep the cost down as much as possable. The proposed system temperature controlled fan using a microcontroller is used to control the speed of the fan according to the temperature and specify the temperature in the display. When fan control is augmented by fanspeed monitoring, a speedcontrol loop can be implemented that is independent of manufacturing variances and wear on the fan. The key component of this temperature controlled fan circuit is thermistor, which has been used to detect the rise in temperature. One of the method is temperature dependent dc fan implementing microcontroller. A circuit with lm35dz temperature sensor, pic16f877a microcontroller, brush less dc motor and few of electronic components is designed and implemented to control the fan speed automatically.
In this mini project, we are going to control the speed of the dc fan automatically as the surrounding temperature changes. Project report for temperature control system eceprojects. The fan im using is a old 12v dc pc fan, one of the two wire types, i tried connecting it to a 5v connection and it span but was too slow to mix the drink properly and so im now using a 12v power supply but that spins too quickly for the magnets. The block diagram includes power supply, rst circuit, 8051 microcontrollers, lm35 temperature sensor, 8 bit adc, l293d motor driver, dc motor, 7segment display, ip switches. And also to assist people who are disabled and are unable to control the speed of fan. Alternatively, the same circuit can be used for automatic temperature controlled ac power control. So, basically in this project we will be controlling fan speed with. The pwm wave for speed control is generated using atmel at89c52 microcontroller. Temperature based fan speed control and monitoring using arduino. Automatic fan speed control system using microcontroller. Project report on speed control of dc motor by using pwm technique.
Typical voltage values for dc fans are, 5v, 12v, 24v and 48v. Introduction this paper provides a system that can utilized to use dc motor for various applications. I made this project because i wanted a way to automatically control the speed of a dc fan according to the temperature read by a lm35 sensor. Project report on temperature controller using microcontroller. May 29, 2019 dc fans generally use less voltage than ac fans. We provide detailed information on how to develop this project with block diagram explanation,circuit diagrametc. As an additional feature lcd is used to present the temperature and the fan speed. Nov 23, 2015 description temperature based speed control of dc fan using arduino. The fan will remain on till the temperature reduces below the threshold value. Jul 11, 2012 the system will get the temperature sense from thetemperature measuring ic corresponding to which temperature digits are obtained anddisplayed and it will control the speed of fan according the duty cyclepwm valuesstored in a lookup table according to the temperature measured. Speed control of dc motor using pulse width modulation submitted by shakti mohan patnaik063261 abinash padhi063273 ritesh kumar lenka063262.
The variable speed drives, which can control the speed of a. This project is a standalone automatic fan speed controller. The block diagram of the temperature controlled fan using a microcontroller is shown in the above figure. Arduino fan speed controlled by temperature electroschematics.