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