Doc temperature controlled dc fan using thermistor. When environment temperature sensed by the sensor crosses the threshold value fan is switched on and temperature is reduced. 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. Temperature controlled fan using 8051 microcontroller. Dc 12v 1a automatic pc cpu fan temperature control speed controller fan speed governor with sensor universal for 2 3 4 wire fan 5. Automatic fan speed control system using microcontroller.
Besides that, the component that made up the temperature sensor is known as thermistor. Temperature controlled fan using pic 16f877a gadgetronicx. This ic l293d is a dual hbridge motor driver used to control the speed and direction of dc motor. Arduino based temperature controlled fan engineering projects. Even if a large current work does not require additional heat sink. Automatic temperature based fan speed controller using arduino. This is to certify that the work in the thesis entitled temperature controlled dc fan. This project will display the configuration, development, advancement, control. Microcontroller pic16f877a based speed control technique 5859 60 61 has been implemented to control the speed of a ceiling fan. The block diagram of fan speed control system using pic16f877a microcontroller is shown below. This is the full project along with all relevant files. The component takes care of the closedloop speed control.
Temperature controlled dc fan using thermistor mini project. This project is a independent automatic fan speed controller that controls the. When the temperature increases the thermistor resistance decrease until the voltage set point that adjusts by potentiometer higher than vgs threshold, mosfet change to on state and make a 12 volts fan start and rotating speed faster when a temperature. Running the fan at lower speed consumes less power, increases the battery life, reduces the noise emitted by the fan, and increases the life span of the fan. Circuit diagram of the temperature fan speed control and monitoring is. Sep 18, 2014 the temperature is measured by means of a temperature sensor lm35. The output voltage of the sensor is fed to the ad channel of the microcontroller. It utilizes arduino board as controlling device and atmega328 as a micro controller.
Below is the circuit diagram for temperature controlled fan using thermistor as temperature sensor. How to make a simple temperature control fan speed. A 12v battery is used to drive the 12v dc operated fan. In this mini project we are going to control the speed of. Features of arduino based temperature controlled fan. The duty cycle has been varied from 0 to 100% to control the fan speed depending upon the room temperature, which is displayed on liquid crystal display. It is used for displaying different messages on a miniature liquid crystal. There are numerous ways to control the speed of motoror fan. Arduino, fan speed controller, temperature sensor, liquid crystal. Dc direct current lm35 fuzzy logic controller ldr light dependent resistor. We have used a triac and firing cirucit in this project.
Temperature controlled dc fan using atmega8 microcontroller. When the temperature increases the base current of q1 bc 547 increases which in turn decreases the collector voltage of the same transistor. Place ums and set resources based on pin assignment generate cmx files, project. Automatic fan speed control according to temperature. This circuit can also continue to vary for the design temperature measurement fan whose speed is implemented as per the requirement of people. Now arduino board is very progressive among all electronic circuits, thus we employed arduino board for fan speed control. This concept is used in the project to control the voltage using pwm. So when the thermistor receives the heat its resistance starts decreasing. This project is about how we can control the fan basedon temperature sensor regardless of traditional thermostat it is also part of smart home application where the fan will gradually increase live speed if the temperature of the environment is increasing. Report temperature dependent dc fan speed control using heat sensor. The temperature sensor acts as a transducer and converts the sensed temperature. System implementation fan speed needs to be manually controlled every time but by using this idea the speed of the fan will be automatically adjusted according to the surrounding.
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. The idea behind this project is to control the speed of dc fan using microcontroller based on variation in temperature 15. Automatic temperature controlled fan electronics project. Oct, 2011 project report on control of dc fan conclusion. It is accomplished by the data communications between arduino, lcd, dht11 sensor module and dc fan. May 18, 2020 here is a simple project on how to control fan or dc motor speed with microchip pic16f877 microcontroller. Requested by some correspondents, this simple design allows an accurate speed control of 12v dc fan motors, proportional to temperature. Nov 24, 2016 temperature based fan speed control working. Its an ideal addon for your pc cooling fans to eliminate produced noise.
Sensors are widely used for measurement of temperature. Description th1, the 50k thermistor, is a standard type. A small dc fan increases or decreases its speed as per the temperature. Fan speed control system using pic16f877a microcontroller. Based on the temperature variations, the speed of the fan. Temperature controlled fan is an alternative way to deal with the speed of the motor. We are going to make one simple miniproject which is temperature controlled dc fan using thermistor. Speed of fan at pwm output fanlcd maptemp, tempmin, tempmax, 0, 100. Aug 15, 2017 temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. A compact power supply consisting of c3, c2, z1 supplies the required filtered dc to the ic lm324 temperature sensor configuration for the intended operations. For examples, room temperature based fan speed control system using pulse width modulation technique 4, design an automatic temperature control system for smart electric fan using pic 5,an automatic temperature controller for multi element array hyperthermia.
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. The given project is a demonstration of such system. It uses lm35 as temperature sensor and dc motor as a fan as a temperature controlling device. As an additional feature lcd is used to present the temperature and the fan speed. All you need to do is specify the required fan speed based on the system temperature. Several temperature ranges was set in the code to vary the motor speed based on the level of temperature sensed. The temperature sensor acts as a transducer and converts the sensed temperature to electrical value. Temperature controlled dc fan by using 8051 microcontroller. Speed of fan depends upon temperature which we map between 32 and 255 and fan speed is display which is map between 0 to 100 as shown in below. Arduino temperature controlled dc fan circuits homemade. Dc 12v 1a automatic pc cpu fan temperature control speed controller fan speed governor with sensor universal for 2 3 4 wire fan. 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. The one used in the above circuit diagram was a 50k model.
The fan will remain on till the temperature reduces below the threshold value. Jan 08, 2012 the fan designed in this project, has different values of speed according to temperature change. When the temperature increases the thermistor resistance decrease until the voltage set point that adjusts by potentiometer higher than vgs threshold, mosfet change to on state and make a 12 volts fan start and rotating speed faster when a temperature hotter. 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. This project is a standalone automatic fan speed controller that.
Temperature controlled fan using arduino hobby project. Dec 10, 2019 temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. Oct 10, 2019 this increases the speed of the fan, and when the ledldr response decreases at lower temperatures, the speed of the fan also decreases. Temperature controlled dc fan using microcontroller. 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. Temperature controlled fan speed projects of 8051 avr. According to the temperature sensor readings, the duty cycle will be automatically changed for controlling fan speed. Since the collector of q1 is coupled to the base of q2 bd 140, the decrease in collector voltage of q1 forward biases the q2 more and so do the speed. Here temperature sensor should be interfaced correctly to the microcontroller to get the correct reading. Usually, when the temperature is high the fan set at high speed and at lower. This project is a standalone automatic fan speed controller. Temperature based fan speed controller 3 certificate of approval the project report titled temperature based fan speed controller prepared by biman kr pal, roll no. I had a few problems with the pwm part mainly because the fan made a disturbing noise so i had to add a simple rc filter at the output of the pwm pin on the arduino board. Climate dependent automatic fan speed controller circuit.
I experimented with different models from 22k to 100k and all worked fine after replacing the trimmer pot. Pdf automatic controls play an everincreasing role in a human way of life. The key component of this temperature controlled fan circuit is thermistor, which has been used to detect the rise in temperature. But when it comes to controlling the speed using microcontrollers. 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. Pwm technique is used in controlling the speed of dc motor. Dc 12v pwm pc cpu fan temperature control speed controller. Place ums and set resources based on pin assignment gener. Temperature based fan speed control arduino project hub. Automatic fan speed control using temperature and humidity. 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. The microcontroller controls the dc fan using the ic l293d motor control.
Arduino mini are used then rx and tx pins are connected to the external pin of. There are tons of nonmicrocontroller based automatic temperature controller projects available around the internet, such as using comparator. Temperature controlled fan speed projects of 8051 avr pic. It is accomplished by the data communications between arduino, lcd, dht11 sensor module and dc fan that is controlled by using pwm. Fan speed controller is one of the parts of the home automation system. Fan speed is varied depending upon the increased in temperature. 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. I hereby recommend that the project report titled temperature based fan. Pdf automatic fan speed control system using microcontroller. Microcontroller based fan speed regulator with continuous. Pdf automatic room temperature controlled fan speed. This project will be applied to system that focuses more on controlling the fan speed and also addition of alarmdetection system for the humanuser. It takes the inputs from the lm35 temperature sensor to measure the current room temperature, and then the microcontroller will respond to control the required fan speed. A small brush less dc fan one used in computers turns on to increase the air circulation.
The temperature based fan speed control system can be done by using an electronic circuit using an arduino board. One of the method is temperature dependent dc fan implementing microcontroller. Components details solderless breadboard, arduino uno, 16. Temperature control is a process in which the temperature of an object is measured and the passage of heat energy into. Since the collector of q1 is coupled to the base of q2 bd 140, the decrease in collector voltage of q1 forward biases the q2 more and so do the speed of.
An implementation of pid controllers for the speed control of a dc motor is given in this report. Temperature controlled dc motor project output video. As it reaches the set value transistor turns on and activates the dc fan. Lcd is used to show the room temperature and fan speed. By using this pwm circuit you can control the speed of dc fan by moving the potentiometer variable resistance. Temperature controlled dc fan electronics projects.
In the future, this type of circuit can be used for the design of smarthouse concept by various other sensors. This circuit uses a thermistor as a sensor, the thermistor resistance decrease when a temperature increase. The proposed system is a practical temperature controller used to control the temperature of any device based on its requirement for different industrial applications. Temperature based fan speed control and monitoring using. Automatic temperature controlled fan project report. In addition to this, the temperature controlled sensor uses the ntc thermistor to control the temperature. 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. Arduino fan speed control using temperature sesnor. Here is a simple circuit to automatically switch on and control a speed of a fan according to the temperature. So all these are basic building blocks of temperature controller system. Temperature based fan speed control using arduino and lm35 sensor.
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. Based on the sensed temperature the speed of the motor is controlled using pwm. In the case of home automation system, room temperature monitoring is very important. Gdstime 120mm ac 110v 220v dc 12v powered fan with speed control, for receiver amplifier dvr playstation xbox component cooling. It utilizes arduino board as controlling device and atmega328 as a. Arduino temperature control adjust fan speed based on. Automatic fan speed control using pic16f877a microcontroller. Apr 18, 2017 temperature sensor 4 fan control 4 air out psoc creator, the integrated development environment ide for psoc, provides a fancontroller component to simplify the design process. Can you mail me the hex file of temperature controlled dc fan using micro controllers project. 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.
Controller is used to control the speed of dc fan and temperature is varied through the temperature sensor and data is sent to at89s52 microcontroller using analog to digital converter. Control circuit and load circuit is isolated using optoisolator 4n35 i. Apr 01, 2021 microcontroller pic16f877a based speed control technique 5859 60 61 has been implemented to control the speed of a ceiling fan. Jan, 2018 the circuit diagram of dc fan motor speed controller regulator circuit using 555. Switching problems is also a factor towards ceiling fan operation 9. For the simplicity of the circuit we have not included control to threshold level. Temperature based dc fan speed control system utilizing microcontroller and. The microcontroller continuously reads temperature from its surroundings. With this simple circuit you will be able to control the speed of a dc fan according to temperature measured by a temp sensor. A 12v battery is used to drive the 12v dcoperated fan. In our project basically, the fan speed will be controlled. How to control speed of a dc fan electronics projects. As a result, output of ic becomes low to switch on t1. This ic l293d is a dual hbridge motor driver used to control the speed and.
A temperature controlled dc fan is a system which automatically. Then the pwm pulse width modulation technique is most. Dc fan control using pwm 2 the above problems can be effectively managed by controlling the speed of the fan. The diagram of fan speed control system shown in fig. The speed of the fan can be decided by the temperature examine by the microcontroller.
Usually, a temperature sensor converts the temperature into an equivalent voltage output. The microcontroller will send the pwm signal through pinrc2 in portc to the transistor which works as a control to the fan. Automatic temperature controlled fan using arduino circuit digest. When the temperature increases above the value set by vr, resistance of thermister decreases and the voltage at pin3 decreases. The circuit of automatic temperature controlled fan is build around temperature transducer ad590 followed by operational amplifier lm324. For information, ceiling fan operation like onoff or speed change mechanism required switching operation. Arduino based temperature controlled fan engineering. I had a few problems with the pwm part mainly because the fan made a disturbing noise so i had to add a simple rc filter. This can be also used in small scale industries for cooling the electricalmechanical equipment. Temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc.
825 875 1043 149 927 1177 1118 1335 779 300 1628 1267 152 1318 688 122 622 1328 473 393 1001 1171 1515 1437 677 600 140 970 1493 574 1616 573