C, the automanual switch should be builtin which would give the user the freedom to control the speed of the fan on manual or auto. Regulating fan speed according to the temperature inside an enclosure is the most. Thus when the temperature of surrounding increases speed of fan also increases and when temperature decrease speed of fan also decreases. Switching on and off control according to human detection and speed control of the fan according to temperature. Intelligent controller with temperature and humidity programming, fan speed control, timer, and alarm system. Jan 15, 2014 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. Temperature controlled fan speed projects 8051, description. It uses a 3phase brushless dc motor and has a proprietary control box inside of it.
Temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. These products vary in their function which ranges from simply turning the fans on and off based on temperature to fully automated control featuring on and off capabilities as well as variable fan speed based on temperature. Do a search for 3wire fan, and look through some of the stuff returned. Overall the general public does not want to manually change the fan speed with the change in temperature. According to the temperature sensor readings, the duty cycle will be automatically changed for controlling fan speed. 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.
A small dc fan increases or decreases its speed as per the temperature change. Fan speed control system using pic16f877a microcontroller. The microcontroller controls the dc fan using the ic l293d motor control. Here temperature sensor should be interfaced correctly to the microcontroller to get the correct reading. 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. Temperature controlled fan using 8051 microcontroller. Thus when the temperature of surrounding increases speed of fan also increases and when temperature decrease speed of fan.
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. Gargi memorial institute of technology page 10 circuit diagram fig 2 circuit diagram of the temperature based fan speed control. It is accomplished by the data communications between arduino, lcd, dht11 sensor module and dc fan that is controlled by using pwm. Why and how to control fan speed for cooling electronic equipment. Brushless dc fan speed control using temperature input and. This fan regulator circuit will automatically control the speed of your. Direct current dc fans although most fans are alternating current ac fans, some newer fans are available with dc.
The speed control using pi and pid control modes is explained and an implementation of the controller using opamps is given. A simple project using microcontroller at89s51 to control the speed of 12v fan according to the surrounding temperature. Arduino automatic temperature fan speed controller youtube. I would also like to programme a attiny 85 to save the arduino. The 2n2222 transistor acts as a switch and controls the fan speed depending upon temperature. This circuit can cool your heat generating electronic devices by operating a dc fan when the temperature in its vicinity increases above the preset level. Electronic circuits dissipate energy in the form of. Qianson dc 12v 1a automatic pc cpu fan temperature control. The block diagram of the temperature controlled fan using a microcontroller is shown in the above figure. 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.
This is achieved by using the principle of the thermistor. This can be also used in small scale industries for cooling the electricalmechanical equipment. Temperature controlled fan with an arduino instructables. Apparently a regular fan controller like the 3 speed ge wont cut it. Temperature triggered dc fan speed controller homemade. Regulate fan speed with automatic temperature controls posted by sam pelonis jun 6, 2016 10. Mixed flow design combined with a pwmcontrolled ecmotor for a truly quiet and energy. The temperaturebased fan speed control system can be done. Getting temperature values from a digital or analog temperature sensor on an arduino is fairly simple. In this project we use the concept of pwm pulse width modulation to increase or decrease the speed of fan. It can be opened with a threewire fan monitoring function stall warning.
For tips on integrating i2c for fan tray control, check out i2c design tips. For other offtheshelf dc fan controls visit smartfan dc. Temperature controlled dc fan using microcontroller. Here is a simple project on how to control fan or dc motor speed uisng pic 16f877 microcontroller. Temperature controlled dc fan using atmega8 microcontroller. It also shows the temperature on an lcd display and the temperature. The principal advantage of linear control is that it is quiet. The idea behind this project is to control the speed of dc fan using microcontroller based on variation in temperature 15. Temperature controlled dc fan using microcontroller ethesis.
These products provide additional control over the cooling and ventilation products. Brushless dc fan speed control using temperature input and tachometer feedback introduction author. The duty cycle of the pwm pulsewidth modulation from microcontroller will determine the speed of the dc motor. Control is via dc voltage level or pwm the latter is better for low speed control. In this mini project, we are going to control the speed of the dc fan automatically as the surrounding temperature changes. Design and fabrication of temperature based dc fan speed. A 2wire fan is controlled by adjusting either the dc voltage or pulse width in. Aug 15, 2017 temperature controlled dc fan can be used to control the temperature of devices, rooms, electronic components etc. Nov, 2017 working of temperature controlled dc fan using thermistor. I use this fan to cool my room, but sometimes it is too fast and i have to frequenctly turn it on and off to keep normal temperature.
It is rated to operate over a 55c to 150c temperature range. The speed control of a motor is frequently required in industrial applications, robotics, home appliances, etc. 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 idea is to control a harbor breeze slinger 72 dc fan. The idea of a speed control system is to maintain the speed of the motor at the desired value under various condition. Pdf nowadays technology is running with time, it completely occupied the life style of human beings. Dc ceiling fan controller device ideas smartthings. Temperature sensor input, pwm05 vdc input or i2c bus input. Controlling a fan using pwm and arduino my thought spot. Mar 08, 2019 operation of the proposed temperature controlled fan may be understood as follows. External pwm 3 or 2 wire fan control, vs 4wire pwm.
The temperature sensor output is read by the arduino and the software establishes the desired fan speed for a. Cloudline t4, quiet inline duct fan system with 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. Three methods of controlling the speed of the fans are available.
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. However, unlike a linear regulator, a dc dc regulator uses a switchmode power supply. In this circuit, pin 3 noninverting terminal of op amp 741 is connected with the. Temperature controlled dc fan using thermistor mini. Design and development of arduino based automatic fan. However, as we have noted, the speedcontrol range is limited. In this circuit, the temperature sensor used is an ntc thermistor, i. The led glows whenever the temperature exceeds 60c. Temperature controlled dc fan using thermistor mini project.
The ultimate project is to control the fan based on temperature. Automatic temperature controlled fan full circuit diagram. Dc ceiling fan controller device ideas smartthings community. The automatic fan speed control system project can be built with pic16f877a microcontroller, regulated power supply, lm35, brushless dc motor, lcd, etc. A set of ir transmitter and photodiode are connected to the microcontroller for counting the number of rotations per minute of the dc motor as a speed. One important variety of fan speed controls are automatic temperature tpwm controls. For systems with i2c, the cirrus6 offers options to adjust temperature control and alarm parameters or directly control fan speed.
The response of the controller to load variations is looked at. Regulate fan speed with automatic temperature controls. Temperature controlled dc fan electronic circuits and. Maybe have to reengineer a control to replace whats in the fan. Temperature controlled fan regulator circuitautomatic fan. The microcontroller will send the pwm signal through pinrc2 in portc to the transistor which works as a control to the fan. Here two thermistors are used to measure the room temperature.
Automatically control the fan speed by sensing the room temperature. Dc 12v pwm pc cpu fan temperature control speed controller. To measure temperature thermistor r1 to be placed as close as possible to where you want him to sense. A set of ir transmitter and photodiode are connected to the microcontroller for counting the number of rotations per minute of the dc motor as a speed sensor. Automatic fan speed control using pic16f877a microcontroller. Operation of the proposed temperature controlled fan may be understood as follows. Pwm is a technique by using which we can control voltage. When environment temperature sensed by the sensor crosses the threshold value fan is switched on and temperature is reduced. Nov 10, 2018 simplest 12v cooling fan controller with temperature status using thermistor temperature sensor ntc mf52103 thermistor, nec d882 tp 120 and tl431 transistors. Because both methods control speed by adjusting the dc. Dc fan motor speed control ic overview the lb8503v is an improved functionality version of the lb8500 and lb8502 products that features the added functions listed below. Temperature based speed control fan microcontroller, design an automatic temperature control system for smart electric fan using pic. This fan regulator circuit will automatically control the speed. Mixed flow design combined with a pwmcontrolled ecmotor for a truly quiet and energy efficient performance.
These controls differ from other fan speed controls in that they regulate fan speed using temperature. The basic dc brushless fan is a 2wire device over which a. This change is reflected on the fan speed by regulating the current to the fan s motor. Fixed mode temperature at 30 degrees, the fan speed control starts from 30 to 50 degrees fan speed linear increase, 50 degrees fan at full speed. Here temperature is considered as a measure of comfort, the less the temperature the more the comfort is. The simplest method of fan control is not to use any at all.
Dc dc regulation is similar to linear regulation in that it controls the speed of the fan by adjusting the dc voltage across it. Pdf automatic room temperature controlled fan speed. My temperature controlled fan circuit has a liquid crystal display connected to the arduino to display the temperature in celsius and fan speed 50255 pwm this controls the duty cycle of the fan which then controls the fan speed. For example, a 12v fan with a control voltage range from 7 v to 12 v could be running at half speed at 7 v. The whole circuit except motor and fan can be manufactured on a single pcb, and it can be used for temperature based control. Temperature based fan speed control and monitoring using arduino.
The lb8503v supports both singlephase and threephase applications. The design contains a temperature sensor the mcu reads with control on fan speed against the ambient temperature. Can be extended to pwm based output, where the speed of the fan. Single temperature sensor, easier to use, more responsive control. 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.
Mar 11, 2017 in this mini project, we are going to control the speed of the dc fan automatically as the surrounding temperature changes. This temperature controlled fan circuit is highly efficient as it uses thyristors for power control. The speed of all fans is proportional to the highest temperature read by 1 to 3 remote. Which develop a speed control system for a bldc motor by closed loop control technique. As an additional feature lcd is used to present the temperature and the fan speed. There are numerous ways to control the speed of motoror fan. Apr 30, 2016 the idea is to control a harbor breeze slinger 72 dc fan. Alternatively, the same circuit can be used for automatic temperature controlled ac power control. The proposed system uses a microcontroller of the 8051 family and a rectifiedpower supply. 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. The loop turns on pin 9 at 100% speed 255 for 3 seconds and then drops to 40% speed 100 for 6 seconds. Fan speed will be changed automatically according to temperature using lm35 and fan will be turned on when the temperature will appear to 270 c and when human will enter the room. Drm079, variable speed dc fan control using the mc9rs08ka2.
In this report, we have implemented a dc motor speed control system. Maybe it is possible to reduce the speed by connecting a resistor in series or using a variac. Kit also includes corded sensor probe, ac power plug, two duct clamps, and required mounting hardware. Temperature controlled dc fan by using 8051 microcontroller. The fan speed should be changed according to the ranges of temperature from 15. The fan speed is directly proportional to the value of the applied pwm duty cycle, in other words, a high duty cycle will produce high speeds and a low duty cycle will produce low speeds. Micro controller unit is used as the controller to maintain the dc motor speed at desired value, based on theinput from the temperature sensor, in order to control the temperature. Added functions supports origin shifting in the speed control. 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. Nov 24, 2016 temperature based fan speed control working. As the temperature of the device increases or decreases, the speed of fan. Why and how to control fan speed for cooling electronic.
Maybe have to reengineer a control to replace whats in the fan or hardware hack their proprietary box remote. 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. Temperature controlled fan using arduino use arduino for. The speed of the fan can be decided by the temperature examine by the microcontroller. Speed control and alarm for dc fans fan controllers. Working of temperature controlled dc fan using thermistor. Temperature based fan speed control and monitoring using. Factory customization available for orders as low as 50 pieces. The fan designed in this project, has different values of speed according to temperature change.
The fan will remain on till the temperature reduces below the threshold value. There are 2 approaches to using pwm for fan speed control. Automatic room temperature controlled fan speed controller using pt100 article pdf available in international journal of scientific and engineering research 68. Simplest 12v cooling fan controller with temperature status using thermistor temperature sensor ntc mf52103 thermistor, nec d882 tp. This ic l293d is a dual hbridge motor driver used to control the speed. Automatic temperature controlled fan using thermistor. Max31740 ultrasimple fanspeed controller mouser electronics. Because both methods control speed by adjusting the dc voltage, both tend to have the same advantages and disadvantages.
This project will display the configuration, development, advancement, control and assessment of an automatic switching speed electric fan. Electronic circuits dissipate energy in the form of heat. The proposed system is a practical temperature controller used to control the temperature of any device based on its requirement for different industrial applications. It is to control the internal cabinet temperature, of my cnc control cabinet, by varying the speed of the dc fan, ie, the fan goes faster the hotter the internal temp gets, having a setpoint for coming on and off. Automatic fan speed control system using microcontroller. Temperature controlled dc fan simplest thermistor circuit. In this project the main intension is to control the fan by heating the sensor, i. One of the method is temperature dependent dc fan implementing microcontroller. To the defects of traditional methods, it proposed the designing strategy of dc motor speed control system. The principles of pwm using a temperature sensor have been introduced in this paper. This change is reflected on the fan speed by regulating the current to the fans motor. Added functions supports origin shifting in the speed control function. Please note that lutron fan controls are not designed to control dc fans.
607 1404 830 670 297 1077 1311 617 12 1220 1513 1371 1618 81 737 1565 828 209 739 5 1459 208 990 1484 94 463 726 101 1187 1075 459 506 125 1446 546 1148 725 702 712 699 194 1453 889 466 726 1099 1243