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WK217
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073 Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com
Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
Time Based Industrial Automation using Dallas
RTC and I2C. Title of the project : Time Based Industrial Automation using Dallas RTC and I2C Domain : Embedded Systems Design Software : Embedded C, Keil, Proload
Microcontroller : AT89S8252
Power Supply : +5V, 500mA Regulated Power Supply
+12V, 500mA Regulated Power Supply
Display : a) Seven Segment Display
RTC : DS 1307
Crystal : 12MHz for MCU, 32.768KHz for RTC
Input : 3X4 keypad
Technical support : M/S Wine Yard Technologies
Phone : 040-6464 6363, www.WineYardtProjects.com
WK217
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073 Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com
Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
ABSTRACT
Advertising hoardings, commercial sign boards, and street lights are generally
switched on at 6:30 pm and switched off at 10:00 am because nobody is available at
the place in the morning to switch it off. But actual required time is 6:30pm to
11:30pm and 4:30am to 6:30am. Meantime i.e., from 11:30pm to 4:30am is not
required, because the public flow on the roads is almost nil in this time. And from
6:30am to 10:00am is also not required as the sun light is available during this time.
That means every day around nine hours of power is wasted. This project gives the
best solution for electrical energy wastage. Also the manual operation of the lighting
system is completely eliminated.
The Project AT89S8252 Microcontroller Based Energy saver for Commercial
Lighting system with RTC DS1307 Interfacing is an interesting project which uses
AT89S8252 microcontroller as its brain. This project is very useful for commercial
sign boards, advertising boards, street lights for automation lighting system. 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.
3X4 keypad is provided for entering the required timings. This keypad made
this project user friendly. 4-digit seven segment 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.
AT89S8252 has inbuilt flash EPROM. Data stored remains in the memory
even after power failure, as the memory ensures reading of the latest saved settings by
the micro controller. It can retain data for more than ten years.
This project uses regulated 5V, 500mA power supply. Unregulated 12V DC is
used for relay. 7805 three terminal voltage regulator is used for voltage regulation.
Bridge type full wave rectifier is used to rectify the ac out put of secondary of
230/12V step down transformer.
WK217
Hyderabad: Tarakarama Estates, 2nd Left Lane Opp RS Brothers, Ameerpet, Hyderabad – 500073 Vijayawada: 4th Floor, White House, Opp All India Radio, MG Road, Vijayawada – 520010
www.WineYardProjects.com
Ph: 040 – 6464 6363, 6625 6695, 888 5555 212
Block Diagram
+12V to Relay
AT89S8252 With in built
Flash EPROM
Reset circuit
Transistor Driver circuit Relay
DS1307 RTC
Crystal
Back-up Battery
+5V to all sections Step down T/F
Bridge Rectifier
Filter Circuit Regulator
Crystal
Control Switch
set
16X2 LCD
Contrast