News 8051 Projects
- ajay_bhargav
- Thu Sep 13 2012, 11:14 am
Here is another great submission from Victor (ugoo5000). We do have many digital clock projects on website but I again wanted to add this one to our list because there are two new and interesting things in it. There are good things to learn from this project. So I summarize all of them here:
- DS1302 as Time keeping IC
- Interrupt based keypad
The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator. DS1302 communicates with microcontroller using a 3 wire interface a very similar to SPI. So this is one new thing to learn in this project.
Now second interesting thing which got my attention is interrupt based keypad. All codes we have seen till now uses keypad scanning. This one uses interrupt based approach for scanning keys. As soon as a key an interrupt is generated though an AND gate connected to all the rows, which indicate controller that a key is pressed. So scanning is done in ISR routine where key is detected. I am sure this way of using a keypad must be helpful fo many of us when making our new projects.
You can download this project from link below
DS1302 based Digital Clock with Calendar
Submit comment
Downloads
- Automatic Railway Gate Control by: Sharanjit Singh in: 8051 Projects
Tue Oct 15 2019, 12:47 pm - Yet Another DTMF Controlled Robot by: Er. Sharanjit Singh in: 8051 Projects
Tue May 07 2019, 02:45 pm - Simple 3 Digit Temperature Meter by: Rakesh Suthar in: PIC Projects
Sat Jul 05 2014, 11:45 am - Electronic Voting machine with Managed Control Unit (Project Report Included) by: Shivani, Geetika Gupta, Vibhore Aggarwal, Megha Singh in: 8051 Projects
Sat May 17 2014, 07:46 pm - LED Scrolling message Display using 8051 by: Pratik Suthar in: 8051 Projects
Thu May 08 2014, 04:28 pm
Comments
- Pure Sine Wave Inverter Using Atmel 89S2051 by: Anthonyvab
Wed Apr 17 2024, 08:51 am - Pure Sine Wave Inverter Using Atmel 89S2051 by: Jerrydauck
Fri Mar 01 2024, 08:51 am - Pure Sine Wave Inverter Using Atmel 89S2051 by: DennisVatry
Thu Feb 22 2024, 10:04 pm - Pure Sine Wave Inverter Using Atmel 89S2051 by: DonaldPaids
Thu Feb 22 2024, 03:45 pm - Pure Sine Wave Inverter Using Atmel 89S2051 by: Victornwh
Mon Feb 19 2024, 12:01 pm
Jasonkam
Mon May 06 2024, 10:00 pm
JamesroW
Mon May 06 2024, 09:37 am
Chrispes
Mon May 06 2024, 07:34 am
ArktiTic
Sun May 05 2024, 07:06 pm
CesslasyNear
Sun May 05 2024, 02:58 pm
chimichmedic1204
Sun May 05 2024, 11:06 am
Jamiegob
Sun May 05 2024, 10:11 am
Gregoryjed
Sun May 05 2024, 10:02 am
Trending Topics
AVR programming nokia6600 i2c eeprom sub address automatic bell download page programming 7-segment display in C 4x3 Keypad driver I2C bus simulation IR sensor IPv6 ebook AVR with ADC0804 rewrite rule extended vortex and field theory Tag Antennas IEC1131 embedded system mobile robot applications MCB2100 evaluation board An Introductory Course-Best AVR Assembly course android controlled smart home