Working of UPC Bar Codes | Anna university questions papers projects for EEE,ECE,IT,MECHANICAL,MBA,MCA Anna university questions papers projects for EEE,ECE,IT,MECHANICAL,MBA,MCA: Working of UPC Bar Codes Bank Exam question paper, GATE Papers,Combined Defence Service Examination papers ,TANCET,BSNL JTO,ISRO,EBOOKS,DRDO ,BARC, , NTPC ,BHEL ,BEL ,HAL,Anna University Papers,ECE , EEE , CSE , IT , Mech , BIOMEDICAL , Textile , MBA , MCA , Anna University Question Bank , Anna University Syllabus , Anna University 'Q' Papers , Gate Papers , 8051, AVR, 8051 projects, free 8051 microcontroller projects, AVR projects, AVR tutorial, AVR microcontroller projects, circuits, hobby electronics, microcontroller based projects, microcontroller projects, final year projects, electronic projects, electronics projects, circuit diagrams, pin diagram, pin description, interfacing with AT89C51, 8051 tutorials, embedded projects, serial port, sensor, Electronic Components, Electronic Circuits, circuits for hobbyist, electronic schematics, DIY projects, breadboard circuits, at89c51, 8051 code, advanced circuits, hobby projects, circuit ideas, embedded system, embedded C, microcontroller programming in C, LCD interfacing, ADC interfacing, circuit components, hobby circuits, seven segment display, 89c51 projects, circuit description, major projects, minor projects, projects for circuit branches, interrupt, 8051 programming, RS232, 8 bit microcontroller,Microcontroller Tutorials, PIC Tutorial, 8051 Microcontroller Tutorial Resource, Connect to the PIC, PIC Tutorials, Micro Controller Tutorials, PIC Micro controller Tutorial Resource, DALLAS 80C320, DS80C320, Connect to the PIC, PIC Tutorials, Dallas DS80C320, 8051 Introduction, Types of Memory, Special Function Registers, Basic Registers, Addressing Modes, Program Flow, Low Level Information, 8051 Timers, 8051 Serial Port Operations, 8051 Interrupts, Additional Features of 8052, 8052 Instruction Set, Computer Science Seminar Topics, Mechanical Engineering Seminar Topics,Electrical Seminar Topics,Electronics Seminar Topics,Seminar Abstract And Report Downloads,High-Speed Architecture, New Instruction Speed, Variable Length MOVX Instruction, Timer Considerations, Dual Data Pointer, Watchdog Kicking, The Watchdog Watchdog Interrupt, Watchdog System Resets, Power Failure Functions, Power Failure Reset, Power Failure Interrupt, Secondary Serial Port, Timed Access Protection, PIC16F877A Tutorial, Introduction to the PIC16F877A, How to hook up the PIC so it will run?, What do the pins mean?, How to program the PIC?, Miscellaneous Advice, LED Blinker, Photoresistor Input, Analog Input (Photoresistor, Sonar sensor, IR sensor, Digital Input (Switches), Output messages to computer screen, Servo Motor Output, DC Motor Output,Gate sample paper with solution , Engineering E-Books , Free ebook websites , Final Year Projects , Placement papers,anna university previous year question bank, previous year question paper,model question paper, two mark question paper,sex,adult,results,atmel humidity Assembly Language code, Digital Clock Employing Memory Mapping, Humidity Sensing, Microcontroller51,control solid state relays, decoded 74ls138, latech 73ls373, port expander, Solid State Relays,urn ON, turn OFF, Relay Driver, back EMF, holding, current, pullup, resistor, coil, BC547, ULN2003, ULN2803, npn, transistor, microcontroller, Technology, circuit,bharathidasan university,university,thanjavur,madurai,coimbatore,chennai,adult,porn,sastra,sastra university, placement and training cell,java,j2ee,ajax,c,c++,oracle,COMPUTER SCIENCE,embedded, embedded systems, j2ee, dotnet, j2me, dot net, jsp, vb, c#, c, c sharp, computer science, cse, information technology, it, Electrical, Electronics, communication,SURVEY,ONLINE JOB,PAY TO CLICK,SEBOSA, ece, eee, academic, college, instrumentation, control, control systems, best ,project centers, project centres, company, companies, software, telecommunication, telecom, networking, matlab, robotics, Artificial intelligence, automation, cloud computing, cryptography, data mining, dsp, database, digital, image processing, fuzzy logic, gsm, gps, gprs, mobile computing, networks, network security, php, power, systems, vlsi, hardware, web services, wireless, rf, rfid, microcontroller, ns2, 2010, titles, list, download, latest, free, advanced, low cost, placement, zigbee, Chennai, india, uk, SOFTWARE ENGINEERING, APPLIED ELECTRONICS, VLSI Design, M.E,EMBEDDED SYSTEMS, COMMUNICATION SYSTEMS,Memory Organization, Microcontroller to LCD, moving message display using 8051 microcontroller, MOVING MESSAGE DISPLAY USING ATMEL 89C51, PIN Configuration, Programming Aspects, POWER ELECTRONICS, 89c51, 89s51 moving message display board, microcontroller 8051,8051, AVR, 8051 projects, 8051 microcontroller projects, AVR projects, AVR tutorial, AVR microcontroller projects, electronics projects, free electronic circuits, circuit diagrams, circuits, schematics, hobby electronic projects, electronic projects, hobby electronic circuit diagram, final year projects, embedded projects, technical articles. Interfacing microcontroller 8051 with peripherals like ADC, LCD, EEPROM,solenoid valve atmel dc control triac,dimmer bt138,uln2003 microcontroleur interfacing a microprocessor to a power thyristor microcontrol based level mesurement 89c51 as pwm controller,at89c2051 sine wave pwm,8051 lift, circuit design for a elevator, Elevator Lift control for three stories with microcontroller 8051, microcontroller based lift controller for three stories, three stories lift,ericsson at command microcontroller, GSM/ EDGE Modem in PCI Interface, Interface of mobile phone with micro-controller, Supporting AT commands,embedded projects,8051,pic,arm,pic16f877a,qualifity,best project in thanjavur,relay design,product manufuring,dvd,vcd,service,free training,electrical and electronic circuits,pcb board design,help of embedded,earn money with embedded,part time job,home based job,vacancy,ieee transaction,optimization,website design,university, Chapter 2 Liquid Crystal Display, Character Generator RAM, DDRAM or CGRAM, Display on or off control, LCD, microcontroller interface with LCD, PIN Configuration, Pressure monitoring with microcontroller 8051, Pressure sensing and controlling, Pressure Sensing System, Programmable Peripheral Interface, RS-232 serial communication,diploma in embedded,matlab in thanjavur, seo,site design @2900 onwards, 8255 and RS232, 89s51 LCD display LM 35 ADC0804 measurment, construction of a pressure sensing system using 8051, designed pressure sensor and transducer,microcontroller based heart rate meter,8051 pin diagram,invention heart rate meter,heart meter watch,heart beat monitor project,8051,AVR,8051 projects,free 8051 microcontroller projects,AVR projects,AVR tutorial,AVR microcontroller projects,circuits,hobby electronics,microcontroller based projects,microcontroller projects,final year projects,electronic projects,electronics projects,circuit diagrams,pin diagram,pin description,interfacing with AT89C51,8051 tutorials,embedded projects,serial port,sensor,Electronic Components,Electronic Circuits,circuits for hobbyist,electronic schematics,DIY projects,breadboard circuits,at89c51,8051 code,advanced circuits,hobby projects,circuit ideas,embedded system,embedded C,microcontroller programming in C,LCD interfacing,ADC interfacing,circuit components,hobby circuits,seven segment display,89c51 projects,circuit description,major projects,minor projects,projects for circuit branches,interrupt,8051 programming,RS232,8 bit microcontroller,microcontroller based heart beat monitor,8051 isp programmer,heartbeat monitor and display on LCD,heart beat rate monitor with sensor,training heart rate monitor with comaprators ans sensor,8051 microcontroller application,optocoupler based sensor of runner heart rate monitor,how to measure heart beat, calculate heartbeat just in one second,8051 rtos,limitations of heart rate monitors, quick display of heart monitor,advantages of electronic medical records,electronic medical billing,used electronic test equipment,electronic document management solution,fetal heart rate monitor,wrist heart rate monitor,avr 8051,baby heart monitor,heart beat counter using microcontroller 8051, block diagram for ir led and ldr based heartbeat monitor with display on computer, MICROCONTROLLER AT89C2051 BASED HEART BEAT MONITOR (PULSE RATE wth assembly code),ir led and ldr based heartbeat monitor with display on computer,wireless biomedical monitoring system using 89S52 microcontroller,wireless biomedical monitoring system using 89S52 microcontroller,8051microcontroller based heart beat monitor,heart pulse system project,very cheap cost in india,lm35,temperature sensor,heart beat sensor,technology,solutions,sastra university,data base design,speed ,innovative centre,home security system model design, water level indicator for home,COMPUTER SCIENCE, SOFTWARE ENGINEERING, APPLIED ELECTRONICS, VLSI Design,IEEE Project center, IEEE 2010 Projects in Tanjore, trichy, Kumbakonam, Pudukkottai, Ariyalur, Pattukkottai, Best IEEE Projects, final year projects, Project Center in Trichy, Project Company in thanjavur, Project training @ tanjore, Free 8051 Microcontroller projects,8052 projects,microcontroller,projects, Datasheers,circuit diagram,Microcontroller,8051,AVR,8085 Microprocessor,BASCOM,projects,tutorials,codes,Libraries,interfacing examples,embedded projects,serial port,infrared remote controls,rf remote controls,home automation,Intel 8051 microcontroller,electronic projects,embedded systems,control systems,computers,technical books,software,assembly language,programming intels 8051,serial communications,rs232,Electronics Projects,Books,Home Automation,Computer Software,Assemblers,Compilers,applications Programming,Embedded Systems Design,8052,AT89C2051,robotics applications,visualbasic, Microsoft Visual Basic,system, based, solar, control, intelligent, motor, controller, vehicle, monitoring, pwm, detection, home, temperature, tracking, alert, blind, alcohol, automated, automatic, close,Robotics,Kits,Circuit Examples,8051,Robots,micro Code,AT89c51, Programmer,IEEE 2010 embedded systems, embedded programming, PIC Micro projects, Microchip Programming, AVR tutorials, PIC Micro tutorials, ATMEL, Microcontrollers based systems, Microcontroller Projects, Embedded projects, Embedded designing in C, Microchip Lab, Embedded systems tips, DIY Electronics,Project Detail,onlinejob, Data Entry, no fee, no investment, part time, home based,recuirements,job,consultancy,helpline,maths,power,ultimate knowledge,prodigy,trichy,mobile
100% FAT LOSS TIPS Click Here!

Working of UPC Bar Codes

, Posted by ADMIN at 2:14 AM

The "Universal Product Code", also known as UPC Bar Code can be found in almost all packages that you buy from department stores, grocery stores or any other stores.

In this post we will discuss on where these codes come from and their actual use.

Origin of UPC Bar Code

The UPC was first developed by a company called Code Council [UCC] so as to help the small scale department stores and grocery stores to speed up their checking out process and also to make a correct digital track of all the sales that happen in a period of time. The system turned out to be very successful that almost all manufacturers started using this method for all retail products.

The manufacturers have to get a permit from the UCC to use this system. The UCC helps the manufacturer to understand the whole process and gives him a 6 digit manufacturer identification number for an annual fee.

The Coding Process

An item number is assigned for each product and the number is unique until that particular product has stopped its sale in the market. All these unique numbers will be given by a UPC co-ordinator who will be employed by the manufacturer. Take a look at the figure below to know what a UPC bar code looks like.

A UPC code will be a 12 digit number which is divided into two parts.

The machine readable bar code.

The human readable 12 digit UPC number.

Out of the 12 digits the first 6 digits represents the manufacturer's number and the next five represents the product number. The last number is called the check digit number.

As a result the UPC co-ordinator will have to make different codes for different sized packages of the same product as well. That is 100 gram toothpaste will not have the same barcode as 500 gram toothpaste [both being of the same manufacturer].

As explained earlier, the last digit of a UPC code is the check digit number. The last digit is very important as it allows the scanner to know whether the correct UPC is given for the product. You may be thinking how a single digit helps in verifying the whole number. Actually this single digit is calculated from all the other 11 digits. Take a look at the example given below.

UPC Code
UPC Code

Let the code of a certain product be 63938200039.

Step 1

Take the digits from all the odd positions and add them. That is add the 1st digit, 3rd digit, 5th digit and so on.

6 + 9 + 8 + 0 + 0 + 9 = 32

Step 2

Multiply the answer obtained from step 1 with 3

32 * 3 = 96

Step 3

Take the digits from all the even positions and add them. That is add the 2nd digit, 4th digit, 6th digit and so on.

3 + 3 + 2 + 0 + 3 = 11

Step 4

Add the answer obtained from step 4  to the value in step 2.

96 + 11 = 107

Step 5

This is the last step that determines the check digit.

Determine the smallest number that, when added to the answer in step 4, is a multiple of 10.

107 + 3 = 110

Thus the check digit is 3.

Each time a product is scanned by the scanner, this calculation showed above is performed. The scanner reads a check digit. If the calculated check digit is different from what it reads, then the scanner shows a false signal. Thus the manufacturer will have to recheck the UPC code or has to rescan till it gets the correct code.

Sometimes smaller products are only given smaller digit UPC bar codes called zero-suppressed numbers. Apart from the manufacturers ID, it will be followed by a lot of 0's.

Product Price Determination

You must have noticed that the price of any product is not given its cover. There will only be a bar code. The idea behind this is that when the customer buys a product, he scans the bar code. Thus the information in the bar code is sent to the store's central computer to look up the UPC number. The central computer sends back the actual price of the item at that moment.

Due to this method, the manufacturer can easily change the price of the product whenever he wants. This can be a disadvantage as well because the store keeper can easily fool the customer. But the idea was mainly intended to change prices when there is a change in the market price.

The first digit of the manufacturer's identification number is special. It is called the number system character. The meaning of the different number system in a UPC code is shown below.

0              Standard UPC number (must have a zero to do zero-suppressed numbers)

1              Reserved

2              Random-weight items (fruits, vegetables, meats, etc.)

3              Pharmaceuticals

4              In-store marking for retailers (A store can set up its own codes, but no other store will understand them.)

5              Coupons

6              Standard UPC number

7              Standard UPC number

8              Reserved

9              Reserved

With Regards,

sms communication,
Tanjore -1.

mobile :9944 186 173        

Currently have 0 comments: