ppt for minor project

1. SAGAR INSTITUTE OF RESEARCH AND
TECHNOLOGY
WELCOME TO OUR MINOR
PROJECT
 TOPIC – SCROLLING DISPLAY USING
LED MATRIX

2. Submitted By :-
 Gaurav Dubey 0133EX213D16
 Ankit Malviya 0133EX213D07
 Abhishek 0133EX213D01
 Amod Bara 0133EX213D05
 Ankit Surkiwal 0133EX213D06
 Ravi Shukla 0133EX213D32
Guided By :-
Dr Swati Pandey Mam
HOD
Department Of Electrical
Dr Smita Shandilya Mam

3. INTRODUCTION
 In educational institutions, the organization use circulars and notice
boards for conveying information to the students. This methodology
takes additional time for updating also many students may not be aware
of the information displayed on notice boards due to non-eye catching
notices. Digital Notice board is one of the ways of displaying notices in
which the notices are display on a LCD Display Screen. These notices
are changed dynamically .We have to only type the notices and send
that notice for displaying on display screen. The Display screen and the
System are connected with the help of the different mechanisms. Also
another advantage is that more than one notice is visible on the screen
as the notices scroll across. A monochrome (single colour) LED dot
matrix display is used for displaying the Characters and Symbols which
is interface with a microcontroller.

4. BLOCK DIAGRAM

5. CIRCUIT DIAGRAM
 1:-Led Matrix Circuit

6.  2:- Matrix Group Connection With Arduino

7.  3:- Connection With Arduino

8. SOFTWARE USED IN PROJECT
 SOFTWARE USE FOR CIRCUIT DESIGN
 1:-PROTEUS

9.  SOFTWARE USE FOR PCB LAYOUT DESIGN
 2:-CIRCUIT WIZARD

10.  SOFTWARE USE FOR PROGRAMING
 3:-Arduino Id

11. PARTS USE IN PROJECT
 Arduino Uno - Nano is a microcontroller board based on the ATmega328P .
 It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6
analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an
ICSP header and a reset button. It contains everything needed to support the
microcontroller; simply connect it to a computer with a USB cable or power it
with a AC-to-DC adapter or battery to get started.. You can tinker with your
UNO without worring too much about doing something wrong, worst case
scenario you can replace the chip for a few dollars and start over again.
 "Uno" means one in Italian and was chosen to mark the release of Arduino
 Software (IDE) 1.0. The Uno board and version 1.0 of Arduino Software (IDE)
were the reference versions of Arduino, now evolved to newer releases.

12.  Electrical resistance:
 The electrical resistance of an electrical conductor is the opposition to the
passage of an electric current through that conductor. The inverse quantity is
electrical conductance, the ease with which an electric current passes.
 resistance shares some conceptual parallels with the mechanical notion of
friction. The SI unit of electrical resistance is the ohm (Ω), while electrical
conductance is measured in Siemens (S).
 An object of uniform cross section has a resistance proportional to its
resistivity and length and inversely proportional to its cross-sectional area. All
materials show some resistance, except for superconductors, which have a
resistance of zero. The resistance (R) of an object is defined as the ratio of
voltage across it (V) to current through it (I), while the conductance

13.  Capacitor :
 A capacitor (originally known as a condenser) is a passive two-
terminal electrical component used to store energy electrostatically in an
electric field. The forms of practical capacitors vary widely, but all contain at
least two electrical conductors (plates) separated by a dielectric (i.e.,
insulator). The conductors can be thin films of metal, aluminum foil or disks,
etc. The 'non conducting' dielectric acts to increase the capacitor's charge
capacity. A dielectric can be glass, ceramic, plastic film, air, paper, mica, etc.
 P–n junction diode :
 A p–n junction is a boundary or interface between two types of semiconductor
material, p-type and n-type, inside a single crystal of semiconductor. It is
created by doping, for example by ion implantation, diffusion of dopants, or
by epitaxy (growing a layer of crystal doped with one type of dopant on top of
a layer of crystal doped with another type of dopant). If two separate pieces
of material were used, this would introduce a grain boundary between the
semiconductors that severely inhibits its utility by scattering the electrons
and holes. p–n junctions are elementary "building blocks" of most
semiconductor electronic devices such as diodes, transistors, solar cells,

14.  Voltage regulator ic :
 A voltage regulator is designed to automatically maintain a constant voltage
level. A voltage regulator may be a simple "feed-forward" design or
 may include negative feedback control loops. It may use an
 electromechanical mechanism, or electronic components. Depending on the
design, it may be used to regulate one or more AC or DC voltages.
 Light-emitting diode :
 A light-emitting diode (LED) is a two-lead semiconductor light source that
resembles a basic pn-junction diode, except that an LED also emits light.
When an LED's anode lead has a voltage that is more positive than its cathode
lead by at least the LED's forward voltage drop, current flows. Electrons are
able to recombine with holes within the device, releasing energy in the form
of photons. This effect is called electroluminescence,

15.  Transistor :
 A transistor is a semi-conductor device used to amplify and switch electronic
signals and electrical power. It is composed of semiconductor material with at
least three terminals for connection to an external circuit. A voltage or
current applied to one pair of the transistor's terminals changes the current
through another pair of terminals. Because the controlled (output) power can
be higher than the controlling (input) power, a transistor can amplify a signal.
Today, some transistors are packaged individually, but many more are found
embedded in integrated circuits.
 Transistor as a switch :

16. WORKING OF PROJECT
 Arduino uno is the heart of project which give signal all the shift resistor , in
this project we use seven 8x8 matrix board so we have 8 rows and 56 columns
. 1 shift register is 74hc 595 use for row and seven 74hc 595 are use for
columns driver. These 7 ic connected in series. Means first ic get data from
arduino and send to next. Each ic have 8 digital output which connected to 8
columns.
 For the power supply uses 5 volt ,1AMP adapter ,For the rows driving required
negative supply but shift resistor output is positive 3-4 volt so for converting
positive to negative supply use NPN transistor BD 139, which work as a switch.
8 transistor use with 4.7 k resistor with base. And ic 7805 use for constant
volt dc supply for all the shift register .

17.  ADVANTAGES:
 1:-Small In Size .
 2:-Easily Programmable.
 3:-Can Be Program Using Mobile Phone.
 4:- Cost Effective.
 APPLICATIONS:
 For Scrolling Any Massage We Can Use Various Places Such As-
 1:- Railway Station
 2:- Bus Stop
 3:-Cinema Halls
 4:- College
 5:-School
 6:- Shop
 7:-Shopping Malls

18.  CONCLUSION
 As the technology is getting advanced day by day the digital notice board are
moving from manual based to display board. We have developed the model of
wireless digital notice board system through Raspberry Pie connected to it,
which display the desired message of the user through a notification on the
mobile. Thus Raspberry being a small yet powerful device and work efficient
ly in digital notice board connected with software. This proposed system has
much upcoming application in educational, institution, railways, malls,
advertisement etc.

19.  REFERENCES:
 BOOKS
 1:- P.S .Bhimra , Power Electronics
 2:- P.S .Bhimra , Elecrtic Machine
 3:- J.B.Gupta ,Electronic Devices & Circuit
 Others
 ForamKamdar, AnubbhavMalhotra and PritishMahadik Display Message on
Notice
 Board using GSM ISSN 2231-1297, Volume 3, Number 7(2013),pp. 827- 832
Research India Publications