Digital Clock Circuit Using 8051 Microcontroller And Ds12c887 2g243w
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
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HOME » FREE PROJECT CIRCUITS » MINI PROJECTS » DIGITAL CLOCK CIRCUIT USING 8051 AND DS12C887
Digital Clock Circuit using 8051 and DS12C887 OCTOBER 20, 2015 BY — 13 COMMENTS
Contents [hide] 1 Circuit Principle: 2 Circuit Diagram: 3 Circuit Components: 4 Circuit Design: 5 DS12C887 Real Time Clock: 6 Pin Description: 7 RTC Address Map: 8 How to Operate? 9 Circuit Applications: 10 Project Code 11 Related Articles
Digital clock displays the time using numbers. This circuit is used in many applications like cars, railway stations, houses, o ces, etc. in order to provide accurate time and date. In this type of applications, normally we use RTC (Real Time Clock) ICs to display the time and date http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
1/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
accurately. This circuit displays the time on LCD. For this clock, we can set the time at any instant. ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details Here the clock works in 24 hour mode and the RTC chip is con gured by programming Get Free Courses 8051 controller.
×
Circuit Principle: Here 8051 controller continuously reads the data from Real time clock and process it in correct order to display the time on LCD. INT1 of the 8051 controller is used to set the time to the digital clock. If you make P3.3 pin LOW then interrupt arises and set_time function is called to set the time. To set the time to the clock use P1.4 and P1.5 pins. P1.4 is used to vary the hours and P1.5 is used to vary the minutes. After setting the time make P1.6 high to run the clock with the time set by .
Related Post: [Digital Stopwatch Circuit]
Circuit Diagram:
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
Circuit Diagram of Digital Clock using RTC DS12C887 and 8051 Microcontroller ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details Circuit Components:
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8051 microcontroller Project PCB Programming cable DC Battery or 12V, 1A adaptor DS12C887 RTC IC 16*2 alphanumeric LCD Push buttons – 4 Slide switches – 3 2 ceramic capacitors – 33pF 12 MHz crystal Electrolytic capacitor – 10uF, 16V Resistor (1/4 watt) – 10k Pot – 10k 5V DC power supply circuit Single pin connecting wires
Circuit Design: The circuit shows you how interface RTC IC to the 8051 controller. Port P0 is used as a data port of Real time clock. Port P2 of controller is connected to the data pins of LCD. Pins P1.1, P1.2 and P1.3 of controller are connected to the RS, RW, EN pins respectively. P1.0 is connected to the RESET of RTC. Push buttons are connected to the P1.4 and P1.5. These are used set the time. P1.6 is con gured as START pin used to run the clock with time set by the . P3.3 is connected to the push button used to call the set_time function.
DS12C887 Real Time Clock: This IC is used most of the applications to provide accurate time and date. This IC provides the time in both 12 hour mode and 24 hour mode. This IC also provides calendar components day, month and year. This RTC uses internal lithium battery to keep the time and date updated when power is failed. This IC has 128 bytes of RAM memory. In these 128 bytes of RAM 14 bytes are used for time, date and s. Remaining 114 bytes are used to store general purpose data. The control s of RTC are accessible only when the power is applied from external source. This IC requires more than 4.25V power supply and the control s are accessible http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
3/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
after 200ms when external power is supplied. ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
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×
DS12C887 IC
Pin Description: MOT: It is a bus type selection pin used to select between Intel and Motorolabus types. This pin is connected to VCC to select Motorola bus type and connected to GND or unconnected to select Intel bus type. 2, 3: Unused pins 4 – 11 (AD0 – AD7): These pins are bidirectional address and data lines of RTC. On these pins address is present in the rst portion of cycle and data is present in the second portion of bus cycle. 12 (GND): This pin is connected to Ground. 13 (CS): This pin must be low to access the chip during read and write operations. 14 (AS): The high pulse on this pin is used to demultiplex the data and address. 15 (R/W): This pin is used for read or writes operations. 16: Unused pin 17 (DS): This is a Data Strobe pin. 18 (RESET): The low pulse on this pin resets all the ags and interrupts but it does not http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
4/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
a ects time and date. 19 (IRQ): Thisis active low pin used as an interrupt input to the controller. Get Free Courses ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
20 – 22: Unused pins
×
23 (SQW): Used to generate square wave with prede ned frequencies 24 (VCC): This pin is connected 5V supply
RTC Address Map: This RTC has 128 bytes of RAM with addresses 00H – 07H. The rst ten locations (00 – 09) are used for clock, calendar and alarm data. 0A – 0D address locations are used for status and control s. Remaining address locations are used to for general data. The following table shows the address locations for clock, calendar and alarm.
Address Locations for Time, Date and Alarm
This IC has 4 control and status s namely A, B, C, D. We need to con gure all these s to get the accurate time and date. In order to con gure these s go through the DS12C887 Datasheet
How to Operate? 1. Initially burn the program to the 8051 microcontroller 2. Now give the connections as per the circuit diagram 3. Switch on the board supply 4. Now you can observe the time on LCD. If you want to set the time make the start pin low and press the push button connected to the P3.3 5. LCD shows set time message. Now use push button which is connected to P1.4 to set hours and use other push button to set minutes. 6. Now make start pin high to run the clock.
Circuit Applications:
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
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This project is used in o ces, houses, hotels and auto mobiles to display the time and
×
date. We can also set the alarm in this project with a little modi cation.
Project Code Related Articles
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using 8051
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with 8051
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Interfacing DC Motor
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8 Channel Quiz Buzzer
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with 8051
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Circuit using
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FILED UNDER: 8051 MICROCONTROLLER, ELECTRONICS, EMBEDDED, FREE PROJECT CIRCUITS, MINI PROJECTS
Comments
David says NOVEMBER 20, 2015 AT 4:30 AM
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
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David says NOVEMBER 20, 2015 AT 5:15 AM
I want to construct this project Reply
shweta says NOVEMBER 21, 2015 AT 7:02 AM
Why you need this project code? because RTC is part of my project Are you trying to make the same project or di erent one. No I am trying di erent project , basically my project is about weather station Give us more details about your project My project is about weather station , at which it is required to take sensors value(temperature, humidity,wind speed and direction) and display it along with time and date on LCD , Reply
dheerajmuttin says DECEMBER 11, 2015 AT 10:11 AM
its is great project for hobby its shiw working of rtc clock i want to do it my self http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
Reply ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
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k.snehitha says JANUARY 7, 2016 AT 10:06 AM
iam interested to do this as my mini project., i want to do same project Reply
sachin w says JANUARY 19, 2016 AT 7:50 AM
I want to construct this project Reply
Ally says JANUARY 24, 2016 AT 2:41 PM
Hello! Thank u for this! Am interested in this project, i prefer to try it my self. Reply
Ally says JANUARY 24, 2016 AT 2:44 PM
Hello! I want to try it. http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
8/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Reply ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
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Racheal says FEBRUARY 6, 2016 AT 6:56 AM
Since I’m doing electronics engineering, I wanted to learn how 8051 micro-controller projects are done. I am making this project for self analysis and to gain knowledge. hence I want to start from basic digital clock. Reply
S. S. Patil says FEBRUARY 24, 2016 AT 2:25 AM
It is a part of my project I am trying same project. Reply
says MARCH 2, 2016 AT 5:08 AM
the code from article itself. Reply
S. S. Patil says FEBRUARY 24, 2016 AT 2:28 AM
because i need a project based on microcontroller http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
9/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Di erent ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
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Reply
Anusha says MARCH 2, 2016 AT 2:43 AM
code is ed in the project Reply
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
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HOME » FREE PROJECT CIRCUITS » MINI PROJECTS » DIGITAL CLOCK CIRCUIT USING 8051 AND DS12C887
Digital Clock Circuit using 8051 and DS12C887 OCTOBER 20, 2015 BY — 13 COMMENTS
Contents [hide] 1 Circuit Principle: 2 Circuit Diagram: 3 Circuit Components: 4 Circuit Design: 5 DS12C887 Real Time Clock: 6 Pin Description: 7 RTC Address Map: 8 How to Operate? 9 Circuit Applications: 10 Project Code 11 Related Articles
Digital clock displays the time using numbers. This circuit is used in many applications like cars, railway stations, houses, o ces, etc. in order to provide accurate time and date. In this type of applications, normally we use RTC (Real Time Clock) ICs to display the time and date http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
1/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
accurately. This circuit displays the time on LCD. For this clock, we can set the time at any instant. ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details Here the clock works in 24 hour mode and the RTC chip is con gured by programming Get Free Courses 8051 controller.
×
Circuit Principle: Here 8051 controller continuously reads the data from Real time clock and process it in correct order to display the time on LCD. INT1 of the 8051 controller is used to set the time to the digital clock. If you make P3.3 pin LOW then interrupt arises and set_time function is called to set the time. To set the time to the clock use P1.4 and P1.5 pins. P1.4 is used to vary the hours and P1.5 is used to vary the minutes. After setting the time make P1.6 high to run the clock with the time set by .
Related Post: [Digital Stopwatch Circuit]
Circuit Diagram:
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
2/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Circuit Diagram of Digital Clock using RTC DS12C887 and 8051 Microcontroller ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details Circuit Components:
Get Free Courses
×
8051 microcontroller Project PCB Programming cable DC Battery or 12V, 1A adaptor DS12C887 RTC IC 16*2 alphanumeric LCD Push buttons – 4 Slide switches – 3 2 ceramic capacitors – 33pF 12 MHz crystal Electrolytic capacitor – 10uF, 16V Resistor (1/4 watt) – 10k Pot – 10k 5V DC power supply circuit Single pin connecting wires
Circuit Design: The circuit shows you how interface RTC IC to the 8051 controller. Port P0 is used as a data port of Real time clock. Port P2 of controller is connected to the data pins of LCD. Pins P1.1, P1.2 and P1.3 of controller are connected to the RS, RW, EN pins respectively. P1.0 is connected to the RESET of RTC. Push buttons are connected to the P1.4 and P1.5. These are used set the time. P1.6 is con gured as START pin used to run the clock with time set by the . P3.3 is connected to the push button used to call the set_time function.
DS12C887 Real Time Clock: This IC is used most of the applications to provide accurate time and date. This IC provides the time in both 12 hour mode and 24 hour mode. This IC also provides calendar components day, month and year. This RTC uses internal lithium battery to keep the time and date updated when power is failed. This IC has 128 bytes of RAM memory. In these 128 bytes of RAM 14 bytes are used for time, date and s. Remaining 114 bytes are used to store general purpose data. The control s of RTC are accessible only when the power is applied from external source. This IC requires more than 4.25V power supply and the control s are accessible http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
3/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
after 200ms when external power is supplied. ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
Get Free Courses
×
DS12C887 IC
Pin Description: MOT: It is a bus type selection pin used to select between Intel and Motorolabus types. This pin is connected to VCC to select Motorola bus type and connected to GND or unconnected to select Intel bus type. 2, 3: Unused pins 4 – 11 (AD0 – AD7): These pins are bidirectional address and data lines of RTC. On these pins address is present in the rst portion of cycle and data is present in the second portion of bus cycle. 12 (GND): This pin is connected to Ground. 13 (CS): This pin must be low to access the chip during read and write operations. 14 (AS): The high pulse on this pin is used to demultiplex the data and address. 15 (R/W): This pin is used for read or writes operations. 16: Unused pin 17 (DS): This is a Data Strobe pin. 18 (RESET): The low pulse on this pin resets all the ags and interrupts but it does not http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
4/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
a ects time and date. 19 (IRQ): Thisis active low pin used as an interrupt input to the controller. Get Free Courses ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
20 – 22: Unused pins
×
23 (SQW): Used to generate square wave with prede ned frequencies 24 (VCC): This pin is connected 5V supply
RTC Address Map: This RTC has 128 bytes of RAM with addresses 00H – 07H. The rst ten locations (00 – 09) are used for clock, calendar and alarm data. 0A – 0D address locations are used for status and control s. Remaining address locations are used to for general data. The following table shows the address locations for clock, calendar and alarm.
Address Locations for Time, Date and Alarm
This IC has 4 control and status s namely A, B, C, D. We need to con gure all these s to get the accurate time and date. In order to con gure these s go through the DS12C887 Datasheet
How to Operate? 1. Initially burn the program to the 8051 microcontroller 2. Now give the connections as per the circuit diagram 3. Switch on the board supply 4. Now you can observe the time on LCD. If you want to set the time make the start pin low and press the push button connected to the P3.3 5. LCD shows set time message. Now use push button which is connected to P1.4 to set hours and use other push button to set minutes. 6. Now make start pin high to run the clock.
Circuit Applications:
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
5/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Circuit Applications: ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
Get Free Courses
This project is used in o ces, houses, hotels and auto mobiles to display the time and
×
date. We can also set the alarm in this project with a little modi cation.
Project Code Related Articles
Digital Voltmeter using
Water Level Controller
Interfacing GPS with
Interfacing 16×2 LCD
8051 Microcontroller
using 8051
8051 Microcontroller
with 8051
Microcontroller
Random Number
Interfacing DC Motor
Celsius Scale
8 Channel Quiz Buzzer
Generator using 8051
with 8051
Thermometer using
Circuit using
Microcontroller
AT89C51 and LM35
Microcontroller
FILED UNDER: 8051 MICROCONTROLLER, ELECTRONICS, EMBEDDED, FREE PROJECT CIRCUITS, MINI PROJECTS
Comments
David says NOVEMBER 20, 2015 AT 4:30 AM
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
6/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
I want to construct the project ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
Reply
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David says NOVEMBER 20, 2015 AT 5:15 AM
I want to construct this project Reply
shweta says NOVEMBER 21, 2015 AT 7:02 AM
Why you need this project code? because RTC is part of my project Are you trying to make the same project or di erent one. No I am trying di erent project , basically my project is about weather station Give us more details about your project My project is about weather station , at which it is required to take sensors value(temperature, humidity,wind speed and direction) and display it along with time and date on LCD , Reply
dheerajmuttin says DECEMBER 11, 2015 AT 10:11 AM
its is great project for hobby its shiw working of rtc clock i want to do it my self http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
7/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Reply ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
Get Free Courses
×
k.snehitha says JANUARY 7, 2016 AT 10:06 AM
iam interested to do this as my mini project., i want to do same project Reply
sachin w says JANUARY 19, 2016 AT 7:50 AM
I want to construct this project Reply
Ally says JANUARY 24, 2016 AT 2:41 PM
Hello! Thank u for this! Am interested in this project, i prefer to try it my self. Reply
Ally says JANUARY 24, 2016 AT 2:44 PM
Hello! I want to try it. http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
8/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Reply ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
Get Free Courses
×
Racheal says FEBRUARY 6, 2016 AT 6:56 AM
Since I’m doing electronics engineering, I wanted to learn how 8051 micro-controller projects are done. I am making this project for self analysis and to gain knowledge. hence I want to start from basic digital clock. Reply
S. S. Patil says FEBRUARY 24, 2016 AT 2:25 AM
It is a part of my project I am trying same project. Reply
says MARCH 2, 2016 AT 5:08 AM
the code from article itself. Reply
S. S. Patil says FEBRUARY 24, 2016 AT 2:28 AM
because i need a project based on microcontroller http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
9/14
6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Di erent ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details
Searching
Get Free Courses
×
Reply
Anusha says MARCH 2, 2016 AT 2:43 AM
code is ed in the project Reply
Leave a Reply Your email address will not be published. Required elds are marked * Comment
Name *
Email *
Website http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
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6/25/2016
Digital Clock Circuit using 8051 Microcontroller and DS12C887
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
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Digital Clock Circuit using 8051 Microcontroller and DS12C887
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GENERAL
PROJECTS
http://www.electronicshub.org/digitalclockcircuitusing8051andds12c887/
PROJECTS
13/14
6/25/2016
Tutorials
Digital Clock Circuit using 8051 Microcontroller and DS12C887
Electrical
Mini projects
Symbols Electronics Microcontroller ElectronicsHub Courses Subscribe Now For Free & Paid Courses Details Courses
Embedded
Aurdino
Calculator
Power
Solar
Robotics
Free circuits
Get Free Courses
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ARM TUTORIALS
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