Arduino based Automatic Temperature Controlled Fan Speed Regulator - PowerPoint PPT Presentation

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Arduino based Automatic Temperature Controlled Fan Speed Regulator

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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. – PowerPoint PPT presentation

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Title: Arduino based Automatic Temperature Controlled Fan Speed Regulator


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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Introduction
  • This practical temperature controller controls
    the temperature of any device according to its
    requirement for any industrial application, it
    also has a feature of remote speed control. The
    LM-35 Analog Temperature device is interfaced to
    analog pin of Arduino board, where it has built
    in ADC which converts these analog reading and
    displays it on a LCD, which indicate the
    temperature of the device. User-defined
    temperature settings can be done using push
    buttons provided through Arduino board.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Block Diagram
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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Hardware Requirements
  • Arduino develop board
  • LCD
  • Transformer
  • Voltage Regulator
  • High speed DC motor
  • Temperature sensor.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Software Requirements
  • Keil compiler
  • Language Embedded C or Assembly.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Power Supply
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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Arduino Board
  • Arduino is a single-board microcontroller.
  • Intended to make the application of interactive
    objects and environments more easier.
  • Basically this is very user friendly. There is a
    microcontroller unit embedded on it.
  • The code is directly loaded from the computer.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Arduino
  • The Arduino microcontroller is an easy to use yet
    powerful single board computer.
  • It has gained considerable traction in the hobby
    and professional market.
  • The Arduino is open-source.
  • Which means hardware is reasonably priced and
    development software is free.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Electronic Speed Control
  • An electronic speed control or ESC is simply an
    electronic circuit which is used to control the
    speed of dc motor.
  • It can take up to 30Amp Continuous current.
  • It has the feature of automatic power cut off,
    over heat protection, over voltage protection.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Battery
  • Lithium-ion polymer battery is used here.
  • It is rechargeable and it provides required power
    to arduino board and dc motor and other
    components.
  • It can last for long time after charged once.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
DC Motor
  • Brushless DC electric motor is a device powered
    by a DC electric source via an integrated power
    supply
  • It produces an AC electric signal to drive the
    motor.
  • It can give up to 10,300 rpm.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Liquid Crystal Display (LCD)
  • Most common LCDs connected to the
    microcontrollers are 16x2 and 20x2 displays.
  • This means 16 characters per line by 2 lines and
    20 characters per line by 2 lines, respectively.
  • The standard is referred to as HD44780U, which
    refers to the controller chip which receives data
    from an external source (and communicates
    directly with the LCD.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
LCD Background
  • If an 8-bit data bus is used the LCD will require
    11 data lines
  • (3 control lines plus the 8 lines for the
    data bus)
  • The three control lines are referred to as EN,
    RS, and RW
  • ENEnable (used to tell the LCD that you are
    sending it data)
  • RSRegister Select (When RS is low (0), data is
    treated as a command)
  • (When RS is High(1), data being sent is text data
    )

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
LCD Background
  • R/WRead/Write (When RW is low (0), the data
    written to the LCD)
  • (When RW is low (0), the data reading to the LCD)

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
LCD Display
  • LCD display is a flat panel electronic visual
    display.
  • 264 display board is used in this project.
  • Value of temperature in degree Celsius.
  • Corresponding value of speed in rpm are
    displayed.
  • It also displays the temperature on an LCD
    display in the range of 55C to 125C.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
LM 35 Temperature Sensor
  • LM35 are used to sense the heat and an IC
    ADC0808 is used to convert the data into digital.
  • LM35 digital sensor has got 3 pins i.e., VCC,
    GND and output pins when LM35 is heated the
    voltage at output pin increases.
  • It is connected to the analog to digital
    convertor IC (ADC).
  • The LM35 series are precision integrated-circuit
    temperature sensors, whose output voltage is
    linearly proportional to the Celsius (Centigrade)
    temperature.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
LM 35 Temperature Sensor
  • The LM35 thus has an advantage over linear
    temperature sensors calibrated in Kelvin.
  • As the user is not required to subtract a
    large constant voltage from its output to obtain
    convenient Centigrade scaling.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
LM 35 Temperature Sensor
  • The LM35 does not require any external
    calibration or trimming to provide typical
    accuracies of 1/4C at room temperature and
    3/4C over a full -55 to 150C temperature
    range.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
MOTOR Driver L293D
  • L293D is a dual H-bridge motor driver integrated
    circuit (IC).
  • Motor drivers act as current amplifiers since
    they take a low-current control signal and
    provide a higher-current signal.
  • This higher current signal is used to drive the
    motors.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
MOTOR Driver L293D
  • L293D contains two inbuilt H-bridge driver
    circuits.
  • In its common mode of operation, two DC motors
    can be driven simultaneously, both in forward and
    reverse direction.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Operation of Motor Driver
  • L293D has 2 set of arrangements.
  • One set has input 1, input 2, output 1 and
    output 2.
  • Other set has input 3, input 4, output 3 and
    output 4.
  • According to block diagram if pin no 2 7 are
    high then pin no 3 6 are also high.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Operation of Motor Driver
  • If enable 1 and pin number 2 are high leaving pin
    number 7 as low then the motor rotates in forward
    direction.
  • If enable 2 and pin number 10 are high leaving
    pin number 15 as low then the motor rotates in
    forward direction.
  • If enable 1 and pin number 2 are low leaving pin
    number 7 as high then the motor rotates in
    reverse direction.
  • If enable 2 and pin number 15 are high leaving
    pin number 10 as low then the motor rotates in
    forward direction.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Working Principle
  • The heart of the circuit is an Arduino board
    which controls all its functions. 
  • An IC LM35 is used as temperature sensor.
  • The LM-35 analog temperature device is interfaced
    to the analog pin of the Arduino board.
  • Its built-in ADC, which converts these analog
    reading and displays that on the LCD, to indicate
    temperature of the device.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Working Principle
  • User-defined temperature settings can be done
    using push buttons provided through Arduino
    board.
  • Maximum and minimum settings are used for
    allowing any  necessary hysteresis.
  • Few push buttons are used  to set the temperature
    by  INC, for increase and DEC for decrease
    settings.
  • As soon the max and min temperatures are set then
    the Arduino program generates PWM output on the
    corresponding digital output according to the
    measured temperature.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Working Principle
  • This  is fed to a DC Fan through a motor driver
    IC.
  • The fan speed is proportional to the temperature
    measured.
  • Standard power supply of 12 volt DC and 5 volt
    through a regulator are made from a step-down
    transformer along with a bridge rectifier and
    filter capacitor.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Advantages
  • Since it is an automated system .
  • It is programmed effectively so that no
    interruptions would stop its functionality.
  • To monitor the environment, that is not
    comfortable or possible to monitor for humans
    (especially for extended periods of time).
  • Prevents waste of energy.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Disadvantages
  • It can only be maintained by technical person.

  • Due to temperature variation, after sometimes
    its efficiency may be decreased.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Future Enhancement
  • This project can be enhanced by using higher
    power electronic devices to operate high capacity
    DC motors.
  • Regenerative braking for optimizing the power
    consumption can also be incorporated.

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Arduino based Automatic Temperature Controlled
Fan Speed Regulator
Conclusion
  • Arduino based Automatic Temperature Controlled
    Fan Speed Regulator Project was designed and
    Implemented. This project can be enhanced by
    using higher power electronic devices to operate
    high capacity DC motors. Regenerative braking for
    optimizing the power consumption can also be
    incorporated.

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