Bengali character based digital clock using 13 segment LED display

Digital clock is a very common and useful device to show the time and date. 7-segment, Alphanumeric, Liquid Crystal and Graphic displays are commonly used in digital clock. They show time in English character. But, we were motivated to design this useful device showing time in Bengali to respect our national heroes, who sacrificed their lives for our language in 21th February, 1952 as well as to introduce our local language in technology besides English. In this paper, a Bengali character based digital clock is designed which shows time in 13-segment LED display. Here, a real time clock (DS1307) is used to generate precise timing pulse, a microcontroller (PIC 16F877A) is used to adjust the time and to interface the 13-segment displays. The time of the clock can be adjusted by pressing simple push switches. The design is simple, cost effective and user friendly.