PC Mouse operated Electrical Load Control Using VB Application - PowerPoint PPT Presentation

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PC Mouse operated Electrical Load Control Using VB Application

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This project is used to control electrical appliances or loads through a personal computer (PC) like theatre lighting can be centrally controlled from a PC. – PowerPoint PPT presentation

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Title: PC Mouse operated Electrical Load Control Using VB Application


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PC Mouse operated Electrical Load Control Using
VB Application
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PC Mouse operated Electrical Load Control Using
VB Application
Introduction
  • The aim of this project is to control  electrical
    appliances through a personal computer (PC). For
    example, theatre lighting can be centrally
    controlled form  PC for a better stage
    management. Presently, these are manually managed
    which makes it difficult to coordinate the
    lighting with  respective scene. With this
    system, one can control  electrical appliances
    on/off by just being seated at one place using a
    PC.

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PC Mouse operated Electrical Load Control Using
VB Application
Block Diagram
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PC Mouse operated Electrical Load Control Using
VB Application
Hardware Requirements
  • 8051 series Microcontroller
  • Level Shifter IC
  • DB Connector
  • Relays
  • Relay Driver
  • Transformer
  • Diodes
  • capacitors
  • Resistors
  • LED
  • Crystal
  • Lamps

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PC Mouse operated Electrical Load Control Using
VB Application
Software Requirements
  • Keil compiler
  • Language Embedded C or Assembly.

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PC Mouse operated Electrical Load Control Using
VB Application
8051 Series Microcontroller
  • 8051 is an 8-bit family of microcontroller
    developed by Intel in the year 1981.
  • This is one of the most popular family of
    microcontroller being used all across the world.

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PC Mouse operated Electrical Load Control Using
VB Application
8051 Series Microcontroller
  • This microcontroller was also referred as system
    on a chip because it has 128 bytes of RAM,
    4Kbytes of ROM, 2 Timers, 1 Serial port, and four
    ports on a single chip.
  • The CPU can work for only 8bits of data at a time
    because 8051 is an 8-bit processor.

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PC Mouse operated Electrical Load Control Using
VB Application
8051 Series Microcontroller
  • In case the data is larger than 8 bits then it
    has to be broken into parts so that the CPU can
    process conveniently.
  • Most manufacturers have put 4Kbytes of ROM even
    though the quantity of ROM can be exceeded up to
    64 K bytes.
  • The 8051 has been in use in a wide number of
    devices, mainly because it is easy to integrate
    into a project or build a device around.

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PC Mouse operated Electrical Load Control Using
VB Application
8051 Pin Description
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PC Mouse operated Electrical Load Control Using
VB Application
Power on Reset circuit
  • The power-on reset (PoR) is an electronic device
    incorporated into the integrated circuit
  • That detects the power applied to the chip and
    generates a reset impulse that goes to the entire
    circuit placing it into a known state.
  • 5V

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PC Mouse operated Electrical Load Control Using
VB Application
Max232
  • The MAX232 is an integrated circuit that converts
    signals from an RS-232serial port to signals
    suitable for use in TTL compatible digital logic
    circuits.
  • The MAX232 is a dual driver/receiver and
    typically converts the RX, TX, CTS and RTS
    signals.
  • When a MAX232 IC receives a TTL level to convert,
    it changes a TTL Logic 0 to between 3 and 15V,
    and changes TTL Logic 1 to between -3 to -15V,
    and vice versa for converting from RS232 to TTL.

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PC Mouse operated Electrical Load Control Using
VB Application
Max232
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PC Mouse operated Electrical Load Control Using
VB Application
DB Connector
  • A DB connector is a connector that is in the
    shape of a horizontal D.
  • Common DB connectors include DB-9, DB-15, DB-19,
    DB-25, DB-37, and DB-50, the number indicates how
    many active lines the connector has, but not
    always how many pins it has.

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PC Mouse operated Electrical Load Control Using
VB Application
DB9 and DB15 Connector
  • The DB9 (originally DE-9) connector is an analog
    9-pin plug of the D-Sub miniature connector
    family.

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PC Mouse operated Electrical Load Control Using
VB Application
DB9 and DB15 Connector
  • Computer serial port Additional information and
    help with the DB-9 and DB-15 or the standard PC
    serial port can be found on our serial port help
    page.
  • The DB-9 and DB-15 are also found on Network
    cards. The DB-9 cable is sometimes used for
    Token-Ring adapters, and the DB-15 is used for
    the thick net coaxial cables.
  • Computer network help and support
  • The DB-9 port is also found on the NeXT computer
    is used to connect laser printers.

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PC Mouse operated Electrical Load Control Using
VB Application
DB19 Connector
  • The DB-19 is a connector found on the Apple
    Macintosh, NeXT, and some Atari computers, and is
    used to connect external disk drives.

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PC Mouse operated Electrical Load Control Using
VB Application
DB25 Connector
  • The DB-25 interface was an older serial
    connector. Additional information and help with
    serial ports can be found on our serial port help
    page.
  • The DB-25 port is also a SCSI interface.
    Additional information and help with SCSI can be
    found on our SCSI help page.

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PC Mouse operated Electrical Load Control Using
VB Application
DB37 Connector
  • Connector found on various network devices used
    to connect network hubs and other network devices
    and perform other functions.
  • Companies that utilize this cable include Cisco,
    Nortel, SMC, and others.
  • The DB-37 connector also connects devices such as
    sensors, switches, satellite antennas, control
    systems, video studio automation, security
    control systems, and other equipment.
  • Computer network and network card help and
    support.

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PC Mouse operated Electrical Load Control Using
VB Application
DB50 Connector
  • SCSI connector that is rarely used or found
    today. Additional information and help with SCSI
    can be found on our SCSI help page.

DB-50 Male Connector
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PC Mouse operated Electrical Load Control Using
VB Application
Relay
  • A relay is an electrically operated switch.
  • Current flowing through the coil of the relay
    creates a magnetic field which attracts a lever
    and changes the switch contacts.
  • The coil current can be on or off so relays have
    two switch positions and have double throw
    (changeover) switch contacts as shown in the
    diagram.

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PC Mouse operated Electrical Load Control Using
VB Application
Relay
  • Relays allow one circuit to switch a second
    circuit which can be completely separate from the
    first.
  • For example a low voltage battery circuit can use
    a relay to switch a 230V AC mains circuit.
  • There is no electrical connection inside the
    relay between the two circuits, the link is
    magnetic and mechanical.
  • To drive relay through MC ULN2003 relay driver IC
    is used

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PC Mouse operated Electrical Load Control Using
VB Application
Relay Driver uln2003
  • ULN is Relay driver application
  • The ULN2003 is a monolithic high voltage and high
    current Darlington transistor arrays.

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PC Mouse operated Electrical Load Control Using
VB Application
Relay Driver uln2003
  • It consists of seven NPN Darlington pairs that
    features high-voltage outputs with common-cathode
    clamp diode for switching inductive loads.
  • The collector-current rating of a single
    Darlington pair is 500mA.
  • The Darlington pairs may be paralleled for higher
    current capability.

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PC Mouse operated Electrical Load Control Using
VB Application
Relay Driver uln2003
  • The ULN functions as an inverter.
  • If the logic at input 1B is high then
  • the output at its corresponding pin 1C
  • will be low.

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PC Mouse operated Electrical Load Control Using
VB Application
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
  • It refers to the controller chip which receives
    data from an external source (and communicates
    directly with the LCD.

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PC Mouse operated Electrical Load Control Using
VB Application
Working Principle
  • The project uses a PC to control the loads.
  • The commands are received by the micro controller
    through level shifted IC Max232.
  • When the program is executed, it drives relay
    from the microcontroller through relay driver IC
    ULN2003.
  • Loads are switched ON and switched OFF based on
    the corresponding command sent from the keyboard
    through HyperTerminal.
  • As per the program, the loads will be turned ON
    and OFF through the relays.

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PC Mouse operated Electrical Load Control Using
VB Application
Working Principle
  • This system is integrated with the electrical
    loads and also connected to the PC where
    centralized control takes place.
  • It uses an RS-232 protocol from the
    microcontroller to communicate with the PC.
  • To turn on/off the appliances, we use Hyper
    Terminal on PC.
  • Once the connection is established with the PC,
    then the system starts working.
  • The microcontroller used in this project belongs
    to 8051 family.

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PC Mouse operated Electrical Load Control Using
VB Application
Future Enhancement
  • This project can be further enhanced by
    implementing a GUI based control panel on the PC
    with appropriate embedded software.
  • The intensity control can also be incorporated
    using power electronics devices.

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PC Mouse operated Electrical Load Control Using
VB Application
Conclusion
  • PC Mouse operated Electrical Load Control Using
    VB Application project was designed and
    implemented. This project can be further enhanced
    by implementing a GUI based control panel on the
    PC with appropriate embedded software. The
    intensity control can also be incorporated using
    power electronics devices

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RF Controlled Robotic Vehicle with Laser Beam
Arrangement
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