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Thursday, August 5, 2010

Implementing Calculator with microcontroller 8051

Purpose of doing this project:
The main purpose of developing this project is as follows:
  1. Implementing and development caculator with microcontroller 8051.
  2. Writing code in c language using Keil C51
  3. String handling in C51 for 8051
  4. Compiling and burning of program in microcontroller
  5. Real time Test of the project.
In this project, you will build a simple calculator using the keypad as an input and the LCD as an output peripheral. After debugging and testing your program, you will have to burn the compiled program to a stand-alone 8051 chip at the end of this lab. implementing a calculator using peripherals like a keypad and lcd in 8051 in c

Interfacing Keypad with Microcontrollers:
Keypads are often used as a primary input device for embedded microcontrollers. The keypads actually consist of a number of switches, connected in a rows and columns arrangement as shown in Fig 1.


implementing a calculator using peripherals like a keypad and lcd in 8051 in c

In order for the micro controller to scan the keypad, it outputs a nibble to force one (only one) of the columns low and then reads the rows to see if any buttons in that column have been pressed. The rows are pulled up by the internal weak pull-ups in the 8051 ports. Consequently, as long as no buttons are pressed, the micro controller sees a logic high on each of the pins attached to the keypad rows. The nibble driven onto the columns always contains only a single 0. The only way the micro controller can find a 0 on any row pin is for the keypad button to be pressed that connects the column set to 0 to a row. The controller knows which column is at a 0-level and which row reads 0, allowing it to determine which key is pressed. For the keypad, the pins from left to right are: R1, R2, R3, R4, C1, C2, C3, C4.

You will design a integer calculator with a keypad input. Your design should be able to read the operands (integers 0 to 9) and the operator from the keypad. You can design any combination of the input sequence as you like. For example, you may wish to input in the way:
1. pick the first operand
2. pick the operator
3. pick the second operand

Code of the project written in c51 is as folows:
8051 Project, 8051 projects,ADC0804,adc0808,adc0809,microcontroller projects, at89c51 projects, 8051 serial port communication,proteus projects,atmega128pc,implementing a calculator using peripherals like a keypad and lcd in 8051 in c,lcd connection with microcontroller,

28 comments:

  1. Dear Dr.Rana,

    I'm a student and a beginner with 8051 microcontroller and i am required to design and construct a prototype for a digital count up and count down timer using assembly language codes and 8051 microcontroller as my assignment .I would be glad if you can guide me with circuit diagrams and the source codes. I have attached a copy of my assignment details for your reference.

    regards,

    ReplyDelete
  2. Dear Arishka:

    I have read your e-mail and i can help you to complete this assignment of couter using microcontroller 8051.

    Please tell me clearly that have you circuit diagram designed by your self, or i have to do that.

    If you have your own circuit diagram , then i can write program for it. otherwise i will do both, circuit design and program of that.

    for this if you realy need my help, then plz visit my website reqularly and write there in comments. which is best method, .



    I have posted your question in comments of this post. please check it. Comments

    http://microcontroller51.blogspot.com/2010/08/implementing-calculator-with.html



    Now i need your permission about to publish your assigment doc on website

    http://microcontroller51.blogspot.com/



    for further discussion you can write in comments sections.



    regards.

    ReplyDelete
  3. hello sir i am doing heart beat monitoring system using 8051,i have seen your blog.sir please can you mail me the proteus simulation file of your project it would be more helpful in designing the physical system.

    hope to see from you soon.

    ReplyDelete
  4. hello sir i am doing heart beat monitoring system using 8051,i have seen your blog.sir please can you mail me the proteus simulation file of your project it would be more helpful in designing the physical system.

    hope to see from you soon.

    ReplyDelete
  5. Yes, i can send the required file, but first you send me your design circuit diagram, if you have any,, if you have proteus file, it could be better.

    ReplyDelete
  6. @ Lenin

    Have you ur own proteus circuit diagram file, or i have to do it? if you have ur own then it would be better, i will correct it.

    ReplyDelete
  7. SIR,
    I was finding information about a count down and count up timer using 8051 microprocessor and i just came across your page. Do you know of how I can find an assembly language that can be written?
    the basic requirements are :
    1. to count minutes and seconds using the 8051 Timer,
    2. display minutes and seconds with a resolution of 1 second,
    3. the user can stop, reset, and restart the counter,
    4. user can choose to count up or count down the timer,
    COUNT UP functions : count uo to a maximum of 60 minutes,
    Buzzer will beep and LED will blink if hits 60 minutes
    COUNT DOWN functions : User is able to set count down timer with a resolution of minutes.
    Buzzer will beep and LED will blink, if it hits 0 minutes and 0 seconds.


    THANK YOU SIR.
    darshini shan

    ReplyDelete
  8. @darshini shan:
    Your project about counter/Timer is good and simple project in the field of microcontroller projects.
    It is very easy to write code in assembly language if you know how to write the code and instruction set of 8051 microcontroller. What you need is ," an assembler like asm51" to complie your program.
    There are a lot many toturials available on Internet. Understand the hardware of 8051.

    If you need help from my side, then plz tell me clearly if you have your own circuit diagram whose program you want to write, or you are at point zero, and wants help in both section.
    ??
    I can help you, but first tell me where are you, what you need more??
    ok

    ReplyDelete
  9. SIR,
    Thank you for replying. I will attach with this email the schematic diagram of our project, Sir. Could you give us any comments/ suggestions about the diagram or if there is any mistake in the diagram? And also we are using the Fet89c5x software to do the program. I will attach the file regarding this project also sir. Could you kindly take a look at it and reply me?
    THANK YOU SIR.

    ReplyDelete
  10. @darshini shan:

    yes i will help you , when you will send me material.

    sofar i did not get any attachment from you.

    ReplyDelete
  11. SORRY SIR. I FORGOT TO ATTACH THE FILE REGARDING THE PROJECT WITH THE EARLIER EMAIL. I WILL ATTACH HERE SIR.
    THANK YOU.

    ReplyDelete
  12. The file you send me, i found it was sent from an other student name " Arishka Sharma". Is this your class fellow?

    How many students are doing the same project?

    Write the name of all group members.

    Also inform me your college or university name.

    What is your degree level.

    Some introduction for my information if you can provide.

    thanks

    ReplyDelete
  13. SIR,
    I don't know of any ARISHKA SHARMA in my class, sir. Me and my group mates are already progressing in the assignment. But if me and my group members face any difficulty we will contact you again, sir. Thank you very much for your cooperation, SIR. It was very nice of you to reply back, SIR. THANK YOU VERY MUCH. Appreciate it. Thanks. KEEP IT UP!!!

    ReplyDelete
  14. Dear Sir,

    yes you can publish my assignment if you want. I manage to find a circuit diagram and source code for my project but my lecturer rejected it. My project must be written in assembly code and the timer must be able to count up and count down. The project which i get is in 'c-language' and the timer only able to count down. Here is the links which i get online http://extremeelectronics.co.in/avr-projects/avr-project-relay-timer-with-atmega8-avr-mcu/

    i will be glad if you can do both the circuit diagram and the source code...

    Thanks for the reply, appreciate it...

    ReplyDelete
  15. @ Arishka:
    The URL you send me about the project was not based on 8051 Microcontroller.
    This timer was built with AVR microcontroller "ATMEGA8"
    (AVR Project – Relay Timer with ATmega8 AVR MCU) which is different from the 8051 family microcontrollers.
    First decide which microcontroller you want to use.
    ok

    ReplyDelete
  16. Yes sir, in that project they use a different microcontroller which i forget to mention. My project have to use a 8051 microcontroller and that is also why my lecturer reject it.

    Sir do you have the circuit diagram for this so that i can buy the components and start fixing it because i have to show my progress in 1 week time. Thank you sir.

    Regards...

    ReplyDelete
  17. Dear Dr.Rana,

    i dint hear anything from u for so long. Hope u still remember me and also will reply me soon.
    have a nice day sir.

    regards,

    ReplyDelete
  18. Sir, Code for Calculator is not vailable in net, is it intensonally removed or it is Some where else

    ReplyDelete
  19. hello sir,
    i am anushka of b.tech student from electronics nd communication branch.
    i want to make "micro controller at 89C51 based industrial fault monitoring system:it will check the faults like over temperature,humidity,power failure,over voltage at the monitor.one can link this with RF data encoders/decoders for wireless link"
    sir plz give me guide line regarding thz,project nd give the procedure of how i make thz project

    ReplyDelete
  20. @ Anu

    The microcontroller project,your are doing, is degree project or short term project of microcontroller 8051. Because scope of these two levels is quit different.
    Then you said that you want to make "micro controller at89C51 based industrial fault monitoring system" Which will check the faults like over temperature,humidity,power failure,over voltage at the monitor.
    Then i think for these detection you have to implement sensors interaction and interfacing also. Then this project would be a complete data acquisition system, which will check and measure all the process parameters of the plant. This is a complex and large project. Other option is, if there is any existing DAQ system at the plant or industry and which produce some signals when there is some thing not correct or error and you want to use these signals as input in your project.
    Try to make situation clear, what you want to do and what are you inputs.

    ReplyDelete
  21. Dr Rana,
    I am a third year student in electronics engineering.I loved your heartbeat measurement prject and would like to make it.Can you send me the code for the project and the circuit diagram.pls send me the code and circiut diagram on varshildoshi@yahoo.in

    ReplyDelete
  22. hello sir, i am third year student.we have lab called assistive technology lab in our college.so we make devices for differently abled people.so i am doing a project for autism kids.so by using micro-controller i want to have calculator facility.but i dont have any idea about which controller have to used . So can you suggest/help me in this regard.thank you sir

    ReplyDelete
  23. Dear Sir,

    I'm an ECE student.We have 8051 programming in the lab.But,in our theory course,we were not exposed to programming 8051 calculator.So,sir can i get any help?
    Thanks and Regards

    ReplyDelete
  24. @ Raju :-
    Yes , if you want to develop a calculator using microcontroller, then start the work by reading the information provided in the post. If you have any questions or confusions you can send me e-mails or write here directly, you will be provided help.
    I have uploaded a PIC microcontroller based calculator on the picinf.blogspot.com , you can use it for learning and understand the alorithm involved in the implementation of calculator using microcontroller.

    ReplyDelete
  25. sir,
    code for calculator is not available here pls send it to me on sujatapatil92@gmail.com

    ReplyDelete
  26. hi, my names Danile. im trying to make a calculator for my final project in my micro processor class. i have an 8051 trainer, and proview32 for what i can use, i was hoping you could help me in making the program. i have 4 weeks to make it.

    ReplyDelete
  27. hi, my names Danile. im trying to make a calculator for my final project in my micro processor class. i have an 8051 trainer, and proview32 for what i can use, i was hoping you could help me in making the program. i have 4 weeks to make it.

    ReplyDelete
  28. Hi, please How much cost make a program of calculator for 8051? I work in MCU 8051 IDE, but I not have nothing developed. Thanks my email is impcolelec@gmail.com

    ReplyDelete

Please note that my helps are not for free.
So, send me your problems and pay money for solution.ok
This is www.microcontroller51.blogspot.com comments section. Here you are requested to write your questions and problems about the microcontroller and electronics projects. Write the questions or comments in such a way that, it have all necessary information, so that i can understand and reply.If you want to send pictures and codes then e-mail me (rghkk@hotmail.com).Thanks.
All comments will be highly appriciated.

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