The document is a presentation about an automatic street light project. It introduces the project, which uses a light dependent resistor and transistor circuit to automatically turn street lights on at night and off during the day without needing a worker. It then explains the components used, including an LDR, transistor, LEDs, resistors and power supply. It describes how the LDR works opposite to normal in this circuit, allowing current to flow in the dark but not in light. Finally, it thanks the teacher for guidance and concludes the presentation.

1. HELLO ,MY FRIENDS,RESPECTED TEACHERS AND ALL WHO R PRESENT THERE.
.
I THINK WE GAIN SOME KNOWLEDGE WITH PPT
SO, GET STARTED
GIVEN BY:
MR.ABHISHEK SHARMA SIR (W.E )()
PREPARED BY :
RISHABH SINGH (10TH , F)

4. I am very thankful to everyone who all supported me, for I
have complete my project I have completed my project
effectively and, moreover , on time .
I am very much happy with this ,and I give a specially
thanks to my teacher (MR.ABHISHEK sir).He gave me
moral support and guided me in different way regarding
topic . He had been very kind & patient while suggesting
me the outlines of this project and correcting my doubts. I
thank him for her moral support .One more time I want to
thank u ,sir ,for giving us these types of projects or activity
which encourage us ,from these types of project our brain is
also work or we say think creatively.

5. INTRODUCTION
Automatic street light. What is it? This is a project in which we consume
energy. How?
Ok I explain it briefly.
So, we all see that , for switching off the street light there is a need of a
man or a worker who switch it off. Sometimes the workers not doing his
responsibility properly.
So from this, the light is waste so much. So it is the reason for making
this project (AUTOMATIC STREET LIGHT PROJECT),it is energy consuming
project and there is no need of any worker for switch off or on the street
light.
It is eco –friendly and low of cost.
It consume so much energy.
HOW ?
Let’s proceed on the other slides.

6. 1. LDR – (Light Dependent Resistance)
2. Transistor – BC 547 B or BC 548 (NPN)
3. Wire - Use singled core plastic coated wire of 0.6 mm
4. Power Supply – 6V or 9V
5. LED – (Light Emitting Diode)
6. Resistance – 1K ,330 ohms ,470 ohms

9. WORK OF LDR IN THIS CIRCUIT
LDR
LDR MEANS LIGHT DEPENDENT RESISTANCE,MEANS IT FLOW
THE CURRENT IN THE CIRCUIT WHEN THERE IS A LIGHT OR U
SAY ITS WORKING WHEN THERE IS A LIGHT FALLS ON IT
&SWITCH OFF WHEN THERE IS A DARK.
BUT IN THIS CIRCUIT I OPPOSE THIS LDR WORK, MEANS ITS
ALLOW THE CURRENT FLOW WHEN THERE IS DARK AND WHEN
T H E R E I S A D A Y L I G H T I S D O N ’ T A L L O W I T .

10. WORK OF TRANSISTOR
A transistor is a semiconductor device used to amplify and
switch electronic signals and electrical power. It is composed
of semiconductor material with at least three terminals for
connection to an external circuit.

11. WHAT IS RESISTANCE OR RESISTOR
THE OBSTRUCTION PATH IN CURRENT IS CALLED RESISTANCE.
THE DEVICE WHICH IS USED IN THIS OBSTRUCTION OF CURRENT IS
CALLED RESISTOR.

12. BIBLOGRAPHY
1 WWW.GOOGLE.COM
2. WWW.AUTHORSTREAM.COM
3. WWW.SLIDESHARE.COM
5. WWW.WIKIPEDIA.COM
6. WWW.ANSWER.COM

13. SO, I ,THINK NOW YOU UNDERSTAND ABOUT THIS
PROJECT .
YOU ALSO ENJOYING THIS PPT.
THANK U FOR SEEING THIS PPT.

15. THE END
THANK YOU
Prepared By: RISHABH SINGH