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DS1307 RTC based Digital Clock Designing in 12 Hour Format with ATmega32 and LCD Display
A digital clock is a type of clock that displays the time digitally (i.e. in numerals or other symbols), as opposed to an analog clock, where the time is indicated by the positions of rotating hands. The clock/calendar provides seconds, minutes, hours information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator.
In this project, we will learn How to design a DS1307 Real Time Clock(RTC) based digital clock with AVR ATmega32 microcontroller and LCD Displays in 12 hour format. Here, we will read time(Hour, Minute and Second), and AM/PM from the DS1307 RTC and we will display all these values in a 16X2 alphanumeric LCD. The data communication between DS1307 RTC and AVR ATmega32 microcontroller takes place using TWI(Two Wire Interface) communication protocol. But before reading the DS1307 RTC, the DS1307 RTC needs to be initialized with second, minute, hour, and AM/PM values. The DS1307 RTC is initialized only once. We will initialize the DS1307 with the following values:- time- 12:0:0 PM. You can change the initialization values according to your need by changing the initialization values in the DS1307 write section of the code. After initialization of DS1307 RTC, the AVR ATmega32 microcontroller will read second, minute, hour and AM/PM values from the DS1307 continuously through two wire interface communication and it will display those values in the 16X2 alphanumeric LCD.
Softwares Required
Hardwares Required
Circuit Diagram
Video
Connection Guide
The step-by-step connection guide for DS1307 RTC based Digital Clock Designing in 12 Hour Format with ATmega32 and LCD Display is as follows
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Steps - 1 ( 0f 10 )
Insert the DC Pin of 12V, 1A DC Adapter to the DC Socket of AVR Trainer Board-100.
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Steps - 2 ( 0f 10 )
Connect PortB header with LCD data header in AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.
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Steps - 3 ( 0f 10 )
Connect RS, RW & EN pins of LCD control header with PD0, PD1 & PD2 pins of PortD header respectively in AVR Trainer Board-100 with 1 to 1 Connectors.
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Steps - 4 ( 0f 10 )
Connect the 16X2 Alphanumeric LCD to the LCD header of AVR Trainer Board-100.
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Steps - 5 ( 0f 10 )
Connect the EEPROM & RTC header of EEPROM & RTC with PortC header of AVR Trainer Board-100 with a 10 to 10 FRC Female Connector.
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Steps - 6 ( 0f 10 )
Connect the ISP header of AVR Trainer Board-100 with AVR USB Programmer header of AVR USB Programmer with a 10 to 10 FRC Female Connector.
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Steps - 7 ( 0f 10 )
Connect the AVR USB Programmer to the PC/Laptop's USB Port directly or with the help of USB AM-AF Cable.
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Steps - 8 ( 0f 10 )
Switch on the power with the help of Power Switch of AVR Trainer Board-100.
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Steps - 9 ( 0f 10 )
Download DS1307 RTC based Digital Clock Designing in 12 Hour Format with ATmega32 and LCD Display Hex file to AVR Trainer Board-100 with the help of SinaProg Hex downloader and AVR USB Programmer.
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Steps - 10 ( 0f 10 )
Wait for some time(30 seconds) and delete or convert the code between DS1307 write section starts here and DS1307 write section ends here into comments in the C Program of the project and compile the code. After compilation, download the code
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