In this competitive world human cannot spare his time to perform his
daily activities manually without any fail. The most important thing he
forgets is to switch off the room lights wherever not required. With
this, even the power will be wasted up to some extent. This can be seen
more effectively in the case of commercial sign boards. This project
gives the best solution for electrical power wastage. Also the manual
operation is completely eliminated. This project provides different on
and off timings to operate the lights around sign boards.. The user can
once program these timings according to his requirements and these
timings will be stored in EEPROM and cannot be erased unless the user
wishes to change it again.
This project is very useful for commercial sign boards, advertising
boards. This system switches on the lights only at preprogrammed
timings. As the DS1307 Real Time Clock chip with battery back-up is
used, there will be no disturbances for the programmed on/off timings
even in power failures.
Three
switches are provided for entering the required timings. These switches
made this project user friendly. 16X2 LCD display is provided to
display the alarm times and current time. DS1307 is interfaced to the
microcontroller for real timing performance. A 3V battery can be
connected to DS1307 to avoid time disturbances caused by power failures.
The user can even change the preprogrammed timings and set the timings
according to his requirements.
SOFTWARE AND HARDWARE TOOLS:
Software Tools:
- Keil compiler
- Orcad.
Hardware Tools:
- Microcontroller AT89S52.
- RTC
- TRIAC DRIVERS AND LOADS
- LCD