The main aim of the project is to develop a system which is operated based on the time for street light. The important consideration in the present field of Electronics and Electrical related technologies are Automation, Power consumption and cost effectiveness. Automation is intended to reduce manpower with the help of intelligent systems and Power saving is the main consideration forever as the source of the power(Thermal, Hydro etc.,)are getting diminished due to various reasons .

1. Real Time Switch
AUTO STREET LIGHT CONTROL USING REAL TIME CLOCK
The main aim of the project is to develop a system which is operated based
on the time for street light.
The important consideration in the present field of Electronics and Electrical related
technologies are Automation, Power consumption and cost effectiveness.
Automation is intended to reduce manpower with the help of intelligent systems and
Power saving is the main consideration forever as the source of the power(Thermal,
Hydro etc.,)are getting diminished due to various reasons .
The main goal of our project “AUTOMATIC STREET LIGHT CONTROLLER WITH
RTC” is to control the switching of Street Lights automatically according to the timings like day
time or night time. This allows us to realize the task efficiently and effectively without the
intervention of human by making it automated and even we can avoid unnecessary wastage
of power by switching it off at right time.
This project is designed around a microcontroller which forms the heart of the project.
In our project we are going to make use of a device called RTC which stands for Real Time
Clock which provides the details such as day month year date and time according to which
the street lights are made ON and OFF. The RTC is interfaced with microcontroller to
communicate and hence to get the information such as time etc. and controls the switching of
street lights. The microcontroller communicates with RTC through a serial protocol called I2C.
The control unit consists of a microcontroller with its associated circuitry. According to
this project, the day and night timings are found with the help of RTC and street lights are
switched accordingly. The hardware involved in the project is Power supply, Microcontroller,
RTC and street light.

2. Real Time Switch
HardwareComponents:
 Microcontroller
 Power supply
 RTC
 Street Light
Software Tools:
● Keil micro vision
● Embedded C
● ExpressPCB
BLOCKDIAGRAM:
Micro
controller
POWER
SUPPLY
STREET
LIGHTS
RTC
LCD
RELAY
230 V

3. Real Time Switch
POWER SUPPLY:
Real time clock DS1307 interfacing
Real time clock DS1307 interfacing with Arduino, in this article you will learn how to
interface real time clock DS1307 with Arduino. What is real time? Why real time clock
is used? What is dedicated integrated circuit for real time clock? How to make digital
clock using Arduino and integrated circuit DS1307? What are application of real time
clock DS1307? Hardware connections of liquid crystal display 16 X 2 LCD and real
time clock DS1303 with Arduino. How to use library of real time clock to display time
and date on LCD? You will get answers of all your questions in this article.
Before reading this article you should have a basic knowledge about Arduino and its
use. You should know how to interface LCD with Adriano and how to use input/ output
ports of Arduino. If you don’t know how to do these things. I recommend you to go
through following articles to get better understanding of this article. Because I have
already posted articles on such things. For more information check following articles.
WHAT IS REAL TIME CLOCK?
As it name suggests, real time clock is used to keep record off time and to display
time. It is used in many digital electronics devices like computers, electronics watches,
date loggers and situation where you need to keep track of time. One of the great
Step Down
Transformer
Bridge
Rectifier
Filter
Circuit
Regulator
section

4. Real Time Switch
benefits of real time clock is that it also keep record of time even if power supply is not
available. Now the question is how can a electronics device like real time clock work
without use of power supply. Because it have small power cell of about 3-5 volt inside
which can work for years. Because real time clock consume minimum amount of
power. There is many dedicated integrated circuits are available in market which is
used to make real time clock by adding necessary electronic components. But in this
article I will discuss DS1307 real time clock IC.
DS1307 IC FOR REAL TIME CLOCK:
DS1302 is IC for real time clock which is used to count seconds, minutes, hours, days,
and months and years. It use I2C communication protocol for communicating with
other devices like in our case we are using Arduino. Arduino read values of time and
date from DS1307 using I2C communication protocol. It also have feature to keep
record of exact time in case of power failure. It is an 8 bit IC. It is used to make real
time clock using some other electronic components. Pin configuration of DS1307 is
given below:
 Pin number one and two is used for crystal oscillator. Crystal oscillator value usually
used with DS1307 is 32.768k Hz.

5. Real Time Switch
 Pin three is used for back up battery. Its value should be between 3-5 volt. Voltage
more than 5 volt may burn DS1307 permanently. Back battery is used to keep track of
time in case of power failure to DS1307. After getting power DS1307 shows correct
time due to back up battery.
 Pin 4 is ground pin of power supply.
 Pin 5 and 6 is used to communicate with other devices with the help of I2C
communication protocol.
 Pin 5 is serial data pin and pin 6 is serial clock. If you don’t know about I2C
communication, i recommend you to learn about it.
 Pin 8 is used for 5 volt power supply.
You need external components to connect with DS1307 to use it as a real time clock.
Circuit diagram with necessary components is given below:
In above circuit diagram there is no connection for power supply and ground at pin number
four and eight. Don’t forget to to provide power supply of 5 volt to this circuit while making
this circuit.

6. Real Time Switch
REAL TIME CLOCK DS1307 WITH ARDUINO:
Real time clock DS1307 with Arduino circuit is given below. Pin number 5 and 6 of DS1307
is connected with SCL and SDA pins of Arduino. If you have already gone through above
mentioned article on LCD interfacing with Arduino and other basic articles to get know how
of Arduino, you can easily understand following circuit.
In today’slife the more wastage of energy.Sotosave the energyandcontrol the energy,hence we
developedourprojectStreetLight.

7. Real Time Switch