1. NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
GUIDED BY:- MISS. RITA PAWADE
PRESENTED BY :
ASHISH SADAVARTI
MICROPROJECT SEMINAR ON
TITLE:- Develop a shadow sensor alarm using IC 741
2. AIM AND OBJECTIVE
INTRODUCTION
COURSE OUTCOME
PROGRAM OUTCOME (PO) ACHIEVED
DIAGRAM
WORKING / PROCEDURE
RESOURCES USED
APPLICATIONS
SKILL DEVELOPED
REFERENCES
CONTENTS
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
3. AIM AND OBJECTIVE
Develop a shadow sensor alarm circuit using IC 741.
Identify the components and develop a error less circuit.
We are able to design the combination circuit and develop
the skill of programing.
To develop skill to prepare power point presentation.
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
4. INTRODUCTION
Shadow alarm is upto- sensitive circuit that sound an alarm
whenever a shadow falls on it.
Now a day it is widly used in a speets of security system
where security is our main concern.
The circuit discribes here is very sensitive and can detect.
The maning of a presonal it is protectable and can be
placed any where for manitoring .
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
5. COURSE OUTCOME
Understand the concept of IC 741 in intregreted circuit.
Identify the differential component required to devepled a
circuit.
Use op- amp linear electronic circuit.
Trubal shooting specified application for the given
specification.
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
8. WORKING / PROCEDURE
Described here is a simple but improved circuit of a smart
shadow sensor alarm, which can register a shadow when
there is a light difference.
Here two 5mm LDRs are used with the popular Op-amp
LM741CN to drive an active piezo-sounder when a “valid”
shadow is detected.
The whole shadow sensor circuit can be powered from
four 1.5V AA cells (6VDC), or similar dc supply sources.
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
9. RESOURCES USED
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
SR.NO Name of
resources
Specificatio
n
Quantity
1) LDR 5m 2
2) IC LM741 1
3) Diode 1N4007 1
4) Transistor BC547 1
5) Battery 9V 2
6) Resistor 10k,1k 2
7) LED Red, Yellow 1
8) Piezo Buzzer 5V 1
10. APPLICATION
However , it is also a tool to protect your live and that of your
employees.
It can be used at night by shopkeepers to protect the valuable in
their showrooms.
It can also be used to provid security at warehouse where
storage and protection of various types of goods is main
concern.
This circuit can also be used for home securities too.
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
11. SKILL DEVELOPED
Complex problem-solving skills and a methodical mind.
Critical thinking.
Strong interest technology.
Communication skills.
Strong IT skills.
NIT POLYTECHNIC NAGPUR
(An NBAAccredited Institute)
(DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION
ENGINEERING)
