Thanks for givin this project at right time
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hi sir,
Ihv problem only in source coding please i need code in assemble language and after 1 week my last propasal date please help me, sending me source code and send ur forum link on my id ,please sir help me.
ali_06qalimi@yahoo.com

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Anonymous | 20 Oct : 03:06 brother if u hav the code for this project in asmbly language plz snd me at talha_khalid58@yahoo.com ail be thankful to u Reply to this

hello master,

do u have the source coding using pic16f628A? If u have it can u please post it on forum or send to my email: kdvustudents@hotmail.com

thanks a lot
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I tried using the project and it works fine. but all it does is asks for the 5 digit code, then the master code and new code. it does not glow the led or seem to send an unlock signal on any pin.
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Ajay Bhargav | 01 Nov : 10:44 are you sure? it must glow the LED when you put the right code.. can you please tell more about this in forum? so i can help? Reply to this

cpss | 07 Mar : 20:58 Hello Dear Ajay I´m Piteira from Portugal. Trying the project Digital Code lock with LCD and Keypad using AT89C2051 but dont´s works for me. Can you tell me watt i am doing wrong ?? Thank you in advance. I am using AT89S8252. ##Piteira## In atach, print screen from simulation Multisim 10.1 and a print screen of Keil insert image: insert image: Reply to this

i need the code .of this project
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Ajay Bhargav | 04 Dec : 02:04 just download it.. click on the blue icon Reply to this

i need hdl code
!dance !dance
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why i get the worning-- "code and data space overlap" for all of your projects code..? can u please tel the secret to the members.. sir..!!!

thanks in advance.
rony
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Ajay Bhargav | 01 Jan : 14:21 Please state the problem and the name of project in which you are facing problem. Make use of forum for this... not the comment area... Reply to this

sofia | 15 Mar : 02:13 sir i want the assembly for this project .please send it to me immediately.email id thas_thameem@yahoo.co.in Reply to this

prajapati brijesh m | 03 Oct : 02:21 i have one problem that is how can i connect the lcd with at89c2051 Reply to this

Sir this is amazing thing
can any one you tell me more about LCD beacuse i have not used it till now or which one should be bought please e-mail me at afnan_decent@hotmail.com
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Ajay Bhargav | 22 Jan : 12:54 Please read the LCD tutorial and make use of forum for any doubt. Reply to this

how do i determine which key is pressed using a 4x3 keypad and assembly on an 8051 controller
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hi,
canu tell which compiler to use to compile the code?
email:vikramjain007@gmail.com
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Ajay Bhargav | 23 Jan : 12:36 use keil compiler.. more information visit www.keil.com Reply to this

hye..i came across your project and it is very good..i want to try to compile these and have it a try..but then how to i compile seem that there are a few programs in the donwloaded file..shud i combine them all then compile or how?thanx ofr your help
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dear mr ajay..
can i compile this with borland?
and shud i combine all the program and then compile?
really need help...thanx in advance
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Ajay Bhargav | 11 Feb : 10:25 Please use the hex file provided.. Reply to this

hey.. u hav given a 5k code.. but the controller has only 2k memory.. wat can i do??/
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dear ajay,
the program is really cool,
but can i change the lcd port from p3 to p0?
and how to do this?
thx!!
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hi..can we use 8051 instead of 89c2051 which u have used in your program?....plz reply me.
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ketul | 31 Jul : 00:14 hi niyati..its only diff of RAM nothing more than that. Reply to this

Can u Please provide the PCB for this Circuit

also I didin't Able to get the REadymade KEPAd MATRix
from wher i can get it
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Very well written code...good work
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I have sucessfully assembled the same with my junk box components ands it working fine. Thanks ajay for the wonderful and simple project. I appreciate you helping students like me. Keep it up.
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can u plz send me the assembly code of this project on thedragon_1234@hotmail.com

thank u
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thanks very much
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I wanna codify this project again.But I failed.How can I compiler them.I couldnt.Please help me.Can you more explain to compiler them again
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hey.. is that scheme correct? please reply on dragec15@net.hr
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Ajay Bhargav | 06 May : 17:36 schematic is correct and we do not mail anyone. Reply to this

Can you please send me the assembly code for this project at blacklist_mostwanted007@yahoo.com
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can u plz giv the assembly code? can u post the link of where i could get it?
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hello sir,
can u plz suggest some project based on microcontroller for diploma..
i need ur assistance in making my 3rd year project
my email id is tanay_lakhani@yahoo.com
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thanks for having this prototype posted here.. i just want to ask something.. are the two capacitors near the crystal oscillator 33uF or 33pF??.. if those are 33pF, then there is no available electrolytic capacitor with such rating.. the schematic symbol of those two represents an electrolytic one.. are those capacitors electrolytic or ceramic?? thanks again!
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sir i am doin digital code lock with LCD and keypad and using pic 16f876/873...i need ur help guys....how to explain the software part and hardware part.i dunt knw....plz help me out guys....my mail
sohel.adiv@gmail.com
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ajay sir i have used P89C51RD2 instead of AT89C2051 and assigned port 1 & 3 for keypad & lcd. i have programmed it using the hex file given by u but it didn't worked. so please help me. another thing is that the program files like " lcd.c " etc opens with the programmer for pic " microelectronica ". what should i do to open it in " kiel " . please please help me . i have to submit the final project report this week
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I hav some little challenge with the program am using for a microcontroller based project: Digital Frequency Counter. This project is expected to be interface with a multiplexed six 7 segment LED.
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HI
CAN ANY ONE PROVIED ME THE C CODE OF THIS PROJECT KINDLY I NEED IT. PLZ HELP ME AND PROVIDE ME THE CODE
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HI
CAN ANY ONE PROVIED ME THE C CODE OF THIS PROJECT KINDLY I NEED IT. PLZ HELP ME AND PROVIDE ME THE CODE
INDLY CONTACT ME AT "tauqeerahmadpk786@gmail.com" i will wait for this
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SIR I NEED DOCUMENTATION FOR THE ABOVE PROJECT.
ITS A MINI PROJECT
PLEASE HELP ME BY GIVING DOCUMENTATION TO THE GIVEN PROJECT Digital Code lock with LCD and Keypad(4X4) using AT89C51
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Ajay Bhargav | 21 Aug : 16:05 I do not have any report for this project. So you have to write on your own, if you want any kind of help from my side, please make use of forum (www.8051projects.net/forum.html) and post your queries. Reply to this

sir i wud be obliged if u send me some details of the internal working of the circuit.also send assembly level codes if possible to the above mentioned id
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hi sir,
can u help me with the coding if i were to modify the schematic into 3 LED instead of the original 1 LED? where by it means it has 3 doors instead of 1.
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dear ajay,
the hex file given is showing file size of 6kb but the AT89c2051 got only 2kb flash memory so how can we use that hex file.. what change i should make if i use 8051?
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Dear Ajay,
I have doubt... How you did this Is there any design procedure..If so coud you mind to give me in detailed explanation regarding the above...what are things i have to procure my self if my superiors ask me how i did this... Feel free to mail me to ashok_nani@ymail.com

Thanks for your concern,
ASHOK VARDHAN

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Ajay Bhargav | 23 Dec : 15:14 Feel free to post in forum for any help. Comments are not a place to ask for help Reply to this

sir i want explanation of coding sir plz mail me at sdarifwl@yahoo.co.in

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dear ajay,
the hex file given is showing file size of 6kb but the AT89c2051 got only 2kb flash memory so how can we use that hex file.. what change i should make if i use 8051 sir plz mail me at sdarifwl@yahoo.co.in
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Ajay Bhargav | 03 Jan : 14:42 thats the size of hex file not the code. Not to worry, code is under 2K. Use the download button to download the code. Reply to this

sir,
can u please give the further details of dis circuit.
ie, llike working of dis circuit,.....
can we do it in hardware or software
please mail it to me.......
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sir,
pls can u help me telling the working and other details of this circuit.
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I wanna ask about programming C in micro
1. what's required to write program , I mean do I need know architecture of 89C2051?..
2. does microsoft visual C++ have all library needed to program or I need special compiler?

thank for your answer
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Dear sir i am new comer in microcontroller i made my on project of lcd interfacing first time and i was successful now i want to interface keypad with lcd your given project is good please send me more project like this at "Engr_bilalwaris@yahoo.com i shell b very thankfull to you also tell me that can i use 8051 replacing 89c2051 so please sir guide me thank you very much waiting for your reply
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Ajay Bhargav | 05 Apr : 13:05 Bilal, whatever doubt you have regarding the project or code you ask in forum. and regarding controller yes you can replace AT89C2051 with AT89C51 or S51 or any 8051 compatible controller. make sure you keep the same ports used in original schematic. Reply to this

:-)Thanx a lot...u guys are really doing a great job...hats off to u
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dear sir i have made this project...everytime when i swith on, it demands 5 digit code then master code then new code....even after saving new code, on reseting it again demands the same thing
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sir....i really2 need the readymade project paper on this...plzzz send me as soon as possoble...e-mail id is Travis_hmar2005@yahoo.com...
:-)
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can u help me what is the proper arrangement of the source code because base from your data..there are five page of source code..the main,keypad,lock,and the lcd.how do i connect that separate programs?..
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Ajay Bhargav | 08 Jul : 08:41 you need to compile all of them in one project to get a single hex file. Use keil software to do that. Reply to this

jernax | 08 Jul : 21:06 can u share a site where i can get that software?...im not familiar with that..is that free?...thanks Reply to this

Ajay Bhargav | 31 Jul : 15:05 www.keil.com i recommend you to use the hex file provided. If you need more help with compiling part, you better use forum. Reply to this

i want this project. it is nice project,
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HOW TO CONNECT LCD WITH AT89C2051
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Ajay Bhargav | 03 Oct : 03:54 solder? see the circuit show. if you still face problems, use forum. Reply to this

is the hex file correct? pls reply..
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yar if u hav the code for this program in asmbly language pz snd me at talha_khalid58@yahoo.com
il be thankfl to u for the hlp
i av to submit the project by nexxt week plz hlp me out
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PLZ SIR CAN U PLEASE SEND ME FULL REPORT ON THIS PROJECT.I LL BE HIGHLY OBLIGED BY UR HELP.PLEASE SEND IT TO:
suyash.roy@gmail.com
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Ajay Bhargav | 31 Oct : 07:18 Well I really dont have any document for this project. If you make one do submit it to me so that i can add it to the project. I will surely give credits to you for your work Reply to this

can u give me the full project report on this. plz send ot to sam_7_ronaldo@hotmail.com
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Sir
Please mail me all the details about this particular project and how to make it. My e-mail id is shubham_2501@yahoo.co.in
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Ajay Bhargav | 04 Feb : 15:43 download circuit, build it. load hex file in controller thats it. incase of any problem use forum. Reply to this

hello sir
can i use 89C51 microcontroller instead of 89C2951.
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Ajay Bhargav | 12 Feb : 07:04 yes you can use.. keep same ports. Reply to this

sir.. can u pls send me the design for this circuit? my id is niguda2@gmail.com pls help me as early as possible..
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Ajay Bhargav | 21 Feb : 06:23 download the zip file from link above. Reply to this

how can i change c code into hex file
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Ajay Bhargav | 21 Feb : 06:18 hex file is provided inside the zip file. Reply to this

i need to compile some other code too.
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Ajay Bhargav | 23 Feb : 06:47 Try keil for compiling the code. use forum for further help. Reply to this

can anyone send me assembly language source code pleazzzz
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Ajay Bhargav | 03 Mar : 11:52 check download section properly. you will get it. Reply to this

can u pls give me description of the working of this project and also all the hardware components required. my mail id vidya252@gmail.com
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i just want to know dat we just have to interface the microcontroller with the circuit or wee need to interface the lcd with keypad also!!
and which code do we need to burn on the microcontroler....there are a lot of files in the zip file!!plzz help!!
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Ajay Bhargav | 16 Mar : 12:16 Hi vipul, make use of forum. i will answer your queries. Reply to this

Sir
could u help me plz? i want to change the passward
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Dear Ajay,

I would like to know if i were to replace the LED to a locking device (in my case, I am using a CD-ROM), how shall I interface it with the microcontroller?

I mean in sense of the CD-ROM drive is IDE, how do i program it to make it eject / close (unlock/lock) ? Could you please help me on this?

My email is maxblade_08@yahoo.com. Lookin forward from you.

Thank you
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Ajay Bhargav | 06 Apr : 03:33 yes you can replace LED with lock make sure you use proper circuit for operating the lock. use forum for further doubts or help. Reply to this

is it possible using AT89S2051 instead of AT89C2051?
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Ajay Bhargav | 16 Apr : 08:00 yes you can replace C2051 with S2051. Reply to this

Our project works fine only when P1.3 (connected to the LED) is grounded. If it is not grounded, the LCD do not seem to respond to the keypad input. LCD only shows black blocks on the screen if we do not ground P1.3.
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sir,many thanks for lock projects,i make it n work proparly. now i need help ur,i need ADDING BUZER this ckt p1.4. i want some devlp,thats..
1. any key press buzer 1 beep
2. wrong code buzer 2 beep alart
3. Blocked buzer beep continiasly
so,need code devolap but i culdnt,sir kindly help me.
akashahmed75@yahoo.com
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please source code this program,,,because my program not running this source code
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Ajay Bhargav | 30 Jun : 17:59 its available in zip file just download it. Reply to this

please help me because i have made this project and it is not working.how should we design the keypad because we are not able to find the keypad of such type and i need to submit this project in 4 days and i am in big trouble.you have just mentioned the keypad and there is no description of showing the supply and ground.please help me out it is very urgent.
mail me at
prernabhandari30@gmail.com
i would be very grateful to you if you could give any contact to discuss the problem.
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Ajay Bhargav | 04 Jul : 09:49 http://www.8051projects.net/keypad-interfacing/connection-diagram.php link above has circuit for 4x4 keypad, remove oone of the column to get 4x3 keypad. Reply to this

which type of keypad should we use because there is no keypad in markt which has 7 wires for connection.how should we connect the keypad of a telephone.
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hello ajay can u guide me on my project... we are in a problem actually working on laptop security module...a clip with keypad lock for laptop.....please help me...contact me on madhu.07422@yahoo.in, hope you can help,thank you
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Ajay Bhargav | 04 Jul : 09:39 please use forum for any kind of help.. Reply to this

sir
this project is very nice
i want use 3310 lcd in this projec
plz help me
Thanks
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what is the value of R1 rasistor in the circuit
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tell me please immediately
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Ajay Bhargav | 29 Jul : 12:38 R1 is a 10K potentiometer. Reply to this

do you have example digital lock using bluetooth project?
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sir,
can u plz sent the assemble code of this project to me..
i need it..
is kind of urgent..
thanks...
eden0205@gmail.com
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Ajay Bhargav | 18 Aug : 12:15 hex files is available inside zip file just use it. its assembled already. Reply to this