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    Digital Speedometer

    Uploaded by

    Ravi Kiran
    This document describes the design and implementation of a digital speedometer. [1] It aims to detect wheel rotation digitally using an IR sensor module connected to a microcontroller in order to overcome issues with analog speedometers like susceptibility to magnetic interference. [2] The speed is calculated from the number of IR pulses detected and displayed on an LCD screen. Key components include an AT89S52 microcontroller, IR sensor module, LCD display, and regulated power supply. Coding is done in Embedded C using Keil software. The working principle involves detecting pulses from an IR LED on the wheel as it rotates and calculating speed from pulse count over time. Potential applications include measuring vehicle, motor, and machine speeds.

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    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd

    Digital Speedometer

    Uploaded by

    Ravi Kiran
    372 views22 pages
    This document describes the design and implementation of a digital speedometer. [1] It aims to detect wheel rotation digitally using an IR sensor module connected to a microcontroller in order to overcome issues with analog speedometers like susceptibility to magnetic interference. [2] The speed is calculated from the number of IR pulses detected and displayed on an LCD screen. Key components include an AT89S52 microcontroller, IR sensor module, LCD display, and regulated power supply. Coding is done in Embedded C using Keil software. The working principle involves detecting pulses from an IR LED on the wheel as it rotates and calculating speed from pulse count over time. Potential applications include measuring vehicle, motor, and machine speeds.

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    This document describes the design and implementation of a digital speedometer. [1] It aims to detect wheel rotation digitally using an IR sensor module connected to a microcontroller in order to overcome issues with analog speedometers like susceptibility to magnetic interference. [2] The speed is calculated from the number of IR pulses detected and displayed on an LCD screen. Key components include an AT89S52 microcontroller, IR sensor module, LCD display, and regulated power supply. Coding is done in Embedded C using Keil software. The working principle involves detecting pulses from an IR LED on the wheel as it rotates and calculating speed from pulse count over time. Potential applications include measuring vehicle, motor, and machine speeds.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    372 views22 pages

    Digital Speedometer

    Uploaded by

    Ravi Kiran
    This document describes the design and implementation of a digital speedometer. [1] It aims to detect wheel rotation digitally using an IR sensor module connected to a microcontroller in order to overcome issues with analog speedometers like susceptibility to magnetic interference. [2] The speed is calculated from the number of IR pulses detected and displayed on an LCD screen. Key components include an AT89S52 microcontroller, IR sensor module, LCD display, and regulated power supply. Coding is done in Embedded C using Keil software. The working principle involves detecting pulses from an IR LED on the wheel as it rotates and calculating speed from pulse count over time. Potential applications include measuring vehicle, motor, and machine speeds.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
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    Digital Speedometer

    P.L.Ganesh
    Speedometer?

    Analog Gauge

    Digital Gauge
    Setbacks of Analog counterpart

    Susceptible to external Magnetic Fields


    which results in a error in the measurement.
    Need additional devices to convert the
    output
    Difficult to notice the value in low light
    conditions.
    Aim of the Project

    Detect the speed of rotation


    digitally.
    Convert the same into speed and
    display the same in the LCD.
    Block Diagram

    LCD 8051
    DISPLAY
    MICRO
    CONTROLLER IR
    MODULE

    POWER
    SUPPLY
    Components used in the Project

    1. AT89S52 Micro Controller


    2. IR Module
    3. LCD
    4. Power Supply
    IR Module

    IR represents Infra-Red light which


    is invincible to Human eye
    Primarily consists Two Components

    1. Transmitter [Infra-Red LED]


    2. Receiver [Photo Detector]
    IR LED

    Photo Detector
    Working of the IR Module

    For every IR signal given by the LED a


    positive pulse is generated at the receiving
    side by the Photo Detector as shown.
    Micro Controller
    AT89S52
    Low-Power, High Performance
    CMOS 8-bit Microcontroller
    Belongs to the Family of 8051
    Internal Architecture
    Pin Description

    Pin Diagram of AT89S52


    Oscillator Connections

    External Clock Drive Configuration


    Liquid Crystal Display

    A general purpose alphanumeric LCD,


    with two lines of 16 characters
    Interfacing LCD to 8051

    Schematic of LCD and Interfacing with


    8051
    Regulated Power Supply
     Converts 230V AC supply to 5V DC
    required for the Microcontroller
    Components used for Regulation

    1.Step Down Transformer


    2.Full Wave Rectifier
    3.Voltage Regulator[LM 7805]
    Coding
     Coding for the Microcontroller is
    done in ‘Embedded C’
     Dumping of code is done by using
    the software “Keil µVision”
    Working
    IR
    LED
    LCD
    DISPLAY
    8051

    MICRO
    CONTROLLER

    WHEEL

    POWER
    SUPPLY

    Speed = Number of pulses


    Time x No of holes
    Applications
     Determining the speed of the vehicles like bikes, car etc by
    attaching the device to the rotating spindles of wheels.
     Finding the speed of the motors and similar rotating machines
    in Industries.
     With minor changes can also be used as a counter in the areas
    like toll booths where number of vehicles passed through it per
    hour can be calculated.
    Future Scope
     By adding a speaker the customer can be warned of high
    speeding by making different sounds for different speeds.
     By using high capability IR sensors the maximum speed it
    will handle can also be increased.
     The speed at specific instants can be noted.
    Queries?

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