Hello Rickey. Can you put also the scheme in this archive?
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yes i've uploaded that orcad schematic in a new archive. please check!
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hey men

i check the asm file with the A51 assembler and it have 50 errors

are you sure its ok?
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Ajay | 26 Jul : 03:24 yes its 100% correct and its compatible with "A51 Macro Assembler" not just A51. and Macro assembler comes under Keil. please download the software from www.keil.com Reply to this

lawalite | 04 Jul : 19:40 needs hex code for 2nd & 3rd line of sanyo lcd 4x16 Reply to this

sir we need a free download of digital clock using ds1307 interfaced with 89c51.u have givn ur sight in which we r unable to download as it is not free.we need a free download.

thanx for responding to my mail...

thank u..
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i have a 1x16 lcd

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Ajay | 26 Jul : 03:21 well this is for 2x16 if u want it in one line.. then many changes have to be made please understand the code and make the changes... Reply to this

Hello ricky,
I have tried your c programng for digital clock using ds1307, but it is not working. It canot read from RTC and also canot write. I am using keil c compiler. please help!
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Ajay Bhargav | 14 Nov : 06:19 Everything is fine in the program. how you are checking the reading and writing? i hope you have downloaded the new files. and please post the problems in the forum. Reply to this

hi
the program has 595 errors with a51
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Ajay Bhargav | 21 Feb : 10:28 Please read the previous comments. The program is compatible with A51 Macro Assembler which comes with keil sofware. not simple A51 assembler. Please post your problems in the forum Reply to this

tuppakarthik | 22 Jul : 04:17 where can i find the program in C??? and when i used ur assembly program it is showing two different time formats switching each second. I am using a 89c51/lcd/232/rtc/I2c kit (NSK electronics), how shall i modify the program for this kit??? Reply to this

Dear Sir, I facing a few problems with this project.
Some times i don't get any display in the lcd & it hangs off.
After getting the display Digital Clock.... I get some junk displayed over the day and seconds. The alarm triggers of few minutes in advance. Have i gone wrong any where... I flashed the uC with the hex file i didn't do any kind of reassembling.... Pl. Help & do mail me if there are any updates for this project. my email ID: tellarun@yahoo.com

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thnx man
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do you have picbasic code for this alarm clock?plz email me if u have...thanks
email:fhcaine@yahoo.com
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hello sir ,
we are prepareing a digital clock using 89c51 along with dallas 1307 having LED display.
we are facing problem related to alram seeting.we need your help
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Ajay Bhargav | 20 Dec : 02:07 Zeus, Please make use of forum. Will surely help you out. Reply to this

Hello sir,
I want to do this project for my final year ,i think this is a good project . I need pcb design for this project. Can u help me for making pcb ?
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I made this project but it is not working properly.First it shows "digital clock" next it ask for time and alarm set. the time will not run and all numbers are distorted... plz help me. mail me at tannumohd@gmail.com.
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Ajay Bhargav | 15 Jan : 03:52 tanveer please make use of forum and if possible provide a screenshot.. to know the problem better.. one recommendation is. check for any loose joint or connection. Reply to this

i have da pcb diagram
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tanveer | 26 Jan : 11:53 can u mail me that pcb design to tannumohd@gmail.com Reply to this

Ajay Bhargav | 26 Jan : 12:32 Share the design with us please.. we will add your contribution in download section. Reply to this

Anonymous | 10 Jan : 23:25 can you please send the design of digital clock to me at mailmesant@in.com Reply to this

Dear Ajay,
we are assembeled the ciruit,and used hex file provided in the net,but we didnt get any clock display.We are getting some dark dislay in one line alone.Also we found that hex file size is around 10kB ,which controller we have to use?

please suggest us....
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Ajay Bhargav | 06 Feb : 12:16 check your circuit carefully, and use forum. Reply to this

Ajeesh V R | 19 Feb : 02:59 Dear Sir, Project hardware is checked properly,and when we switch on it shows "digital clock"on the diaplay and also accepts alarm settings,time settings clearly.after this once it starts running in clock mode many characters are distorting ,the same problem is observed by Thanveer also.Could you please help me to overcome this problem? Reply to this

Rasel | 15 Feb : 06:47 RA Reply to this

Dear ajay,
this project is not working properly,the clock is not running. some other deploma & engg college students did this project but for them also it is Failure project. i want to contact with u, can u give your mob no.....I have only one month to complete the project. so plz help me..
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Ajay,
I have assembled the LCD and 1307 on a bread board and connected to AT89S52 board via FRC cable.Initially all the digits looks like blocks, but even after setting the values, the same display returns. sometimes the seconds start counting but again it resets in few seconds. I believe the problem is in communicating with the RTC. but i am not able to figue out exactly what is causing it. i have checked the connections.
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hiii ajay,,,, thanks for giving such a good facility....
i just need ur help that the program u have given which is not working on simple A51 assembler... it givees 402 errors... i reduced almost to 382....but still its tough...so can u plz give me a link by which i can download A51 macro assemler ?
thanks for the project...
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Ajay Bhargav | 20 Mar : 15:55 please use forum for getting help. code does not have any errors in it. will explain you once you post in forum Reply to this

I want to convert this project to display in the 16X64 matrix LED. What changes should I make in the circuit and the C program files? Please help.
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Sir, Is it possible to set 4 or more alarms in just 24 hours? can you give me some ASSEMBLY language reference? please.... Especially on how to program the AT8series or 8051 Microcontrollers...please do reply..THank you..
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hello ajay ru there, i want to ask you a think relating to your design of rtc clock using 8051 and ds1307 , i am facing a problem the characters are garbled i have tried replacing lcd ds ic and 8051, crystals, etc, can you pls tell me where i am wrong?
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Sir give some Keil code(C code) for DS1307 interfaceing with AT89C51 Microcontroller. Thank You.......

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I found out where did i made the mistake regarding garbled or junk display, i was not using network resistor for the pull up resistor, was using ordinary res. I check some other's pcb design and solved the problem. And please use a good quality DS1307 IC
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can we get a code in assembly language for this? rather than in .hex format?
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hello ajay ru there, i want to ask you a think relating to your design of rtc clock using IC AT89C20518051 +help+picture
sir we need a free download of digital clock+program assembly to 8051
sender IRAN
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sir iam from sikkim,its not uplading what is the problem its verry important for me .please give a reason
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Ajay Bhargav | 16 Feb : 09:24 PLEASE USE FORUM IF YOU HAVE A DOUBT! Reply to this

if i want multiple alarm times what changes are required in coding. .... URGENT!!!
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Sir, I need help ... What if i want multiple alarm times???
Please reply soon.
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can i ask panu poh mgconnect sa computer ng hardware ntin...
we made ng digital clock in pcb tpos my programming kami..kso di sya nagcconect....

anu poh kaya yun pin configuration ng printer port to hard ware nmin..
please help me..!!
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sir, we used your code and we get only the default display in the LCD... The hex code seems to be 9K in capacity and our IC can hold only 4K... What do we do about this?
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sir,i need the ckt and c code(for keil compiler)for digital alarm clock.So plz help me.
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I made this project but it is not working properly.First it shows "digital clock" next it ask for time and alarm set. the time will not run and all numbers are distorted... plz help me. mail me at manojramnani88@gmail.com
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good site for education
Thanks
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sir,I'm contacting u for 100% correct code in C for Keil because I'm hobieast not from electronis engg. i done my Auto. Engg. so I understand only C code. Please Sir or sombody help me to out this......................Thanx...
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please sombody help 2 snd the code for digital clock in c++......
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sir i also need for 100% correct code in C for Keil. Please Sir or sombody help me to out this......................Thanx.
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Ajay Bhargav | 16 Dec : 13:54 the code is correct Reply to this

Anonymous | 19 Mar : 01:08 hello sir, can u send me the PCB design file for DS1307 RTC. Regards, Rajashekharreddy.M rajashekharreddy_m@yahoo.com Reply to this

Ajay Sir,

I have made this clock and it is working ... How I want to convert or create a LED based clock.
I have 7 segment using 5 mm LED, each line of segment has five LEDs.
Please help me to connect this with atmel 2051 and DS1307.
Power supply : 7805 (for Motherboard) 7812 (for LED segment)
Please help.

Thanks,
Karan
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Ajay Bhargav | 22 Mar : 07:00 use forum please. Reply to this

sir i want the source code for alarm clock in 8051.. can you help me with this pleaseeeee
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sir,where i can get a5a1 macro assembler?
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few doubts in understanding the code. plz help

1. can macro and endm be used in keil microvision?
2. in run1 label r6 is initialised 3fh, that means acall receive (in here label)operation takes place 63 times, why?
3. what exactly is rtc initialisation, means with what time the clock starts? we do 11 initialisations, sendin content of r0 ,and r1. r0 has sec to amin, but what is r1 for?

please clear the above doubts. thanks.
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Hi there,

do you have done the similar project but using motorola 68000 microprocessor?

thanks in advance.
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anyone knows pinout of lcd (J2)?
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Ajay Bhargav | 22 Apr : 04:08 see LCD tutorial in tutorial section: http://www.8051projects.net/microcontroller-tutorials/ Reply to this

hex file has size of 9282b, but c51 mcu has only 4k flash. Why?
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Ajay Bhargav | 11 May : 08:46 thats the size of hex file not the code. use it without any fear. Reply to this

dear sir, we want to make a digital clock with using ds 1307 and 89c51.
we are working with "umps" assembly language. we want to display on seven sigment.
pl. help.
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thank you! i am vietnammes
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sir plz mail me all the codes and circuit on my mail chitreshb@gmail.com
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