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luggage security system

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by Akhil Vishwa on 7 January 2013

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Transcript of luggage security system

Often while travelling by train or bus, our luggage is locked using a typical chain and lock arrangement . A simple circuit is designed to alarm when somebody tries to cut the chain. CONTENTS


INTRODUCTION
BLOCK DIAGRAM
CIRCUIT DIAGRAM
COMPONENTS
HARDWARE USES
WORKING
APPLICATIONS BATCH NO: B11-1

V.AKHIL-09881A0463

CH.UPENDER-09881A04A4 BLOCK DIAGRAM UNDER THE GUIDANCE OF

Mr. Srinivas

Designation: Asst. Professor INTRODUCTION CIRCUIT DIAGRAM

IC UM 3561
TRANSISTORS
DC POWER SUPPLY
SPEAKER
RESISTOR
CAPACITOR UM3561 is an excellent ROM IC that can generate Multi siren tones simulating Police siren, Ambulance siren, Fire brigade siren and Machine gun sound. This 8 pin low power IC can work down to 2.4 volts.
The UM 3561 is a low cost siren generator designed for use in toy applications. The IC has an inbuilt oscillator and tone selection pins. It is easy to make a siren generator with only a few external components. Only one external resistor and a speaker driver transistor are sufficient to make a simple siren generator. HARDWARE USES IC UM3561: Transistors used in this
circuit are BC548
BC558 COMPONENTS INTERNAL STRUCTURE
OF IC UM3561 Working As shown in the schematic, Transistor T1 enables supply to
the sound generator chip when the base current starts flowing through it. When the wire (thin enameled copper wire of 30 to 40 SWG (Standard Wire Gauge), used for winding transformers) loop around the chain is broken by somebody, the base of transistor T1, which was earlier tied to positive rail, gets opened. As a result, transistor T1 gets forward biased to extend the positive supply to the alarm circuit.In idle mode, the power consumption of the circuit is at its minimum and thus it can be used for hundreds of travel hours. The IC produces all the sound effects, the output at Pin 3 being amplified by the Darlington arrangement. A 64 loudspeaker can be substituted (to gain better sound clarity) in place of 8 loudspeaker (250 mW Power Rating). To enable generation of different alarm sounds, connections to pin 1 and 6 may bemade as per the table. select 1
(pin 6) select 2
(pin1) Sound Effect x x police siren vdd x Fire-engine siren vss x Ambulance siren "*" vdd Machine-gun sound Note: x= no connection; "*"= do not care This circuit can also be used for like
Car security
Motorbike security
Hand bag etc.. Applications References [1] Colin Mitchell, “100 IC Circuits Book,” 2010
[2] Tim Surtell, “Adding Sound to your Models,”
http://www.eleinmec.com/article.asp?40
[3] ChipFind Datasheet Archive
http://doc.chipfind.ru/umc/um3561.htm
[4] DIY UM3561 circuits and projects
http://electroschematics.com/tag/um3561-circuits/
[5] United Microelectronics UM3561 Datasheet
http://www.datasheetarchive.com/UM3561-datasheet.html
[6] Bowin Electronics Melody Generators
http://www.bowinic.com.hk/IC/Melody,%20Sound%20Effect%20IC/UM3561.pdf LUGGAGE SECURITY
SYSTEM QUERIES THANK YOU
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