Abstract:
Electronic display is now the most conventional means of presenting information all over
the world. Due to its attractive brightness and simple operability, it is one of the most
popular medium of presenting different types of information to the mass people. The
display elements in an embedded system consume the major portion of the total power
required to run the whole system. When large amount of display elements are used power
dissipation issue becomes acute. In many cases special cooling arrangements like heat
sink, cool air circulation, fan etc. are used to keep the system workable. The demand of
low power consumption for embedded systems motivates to explore new approaches for
managing power. This project proposes an alternative approach to develop a low power
consuming embedded system for message display by introducing a new scanning
technique. In the proposed system a controller scans all the display units continuously to
ensure that only one unit is on at any given time. In this way power consumption will be
much lower than that of existing static display system. Here a 'Muslim Calendar'
containing date, time and prayer times for five salah has been developed as a test case.
Seven segment displays are used as display units.
