Prashant Project 2

8/6/2019 Prashant Project 2

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CONTENTS

1. INTRODUCTION

2. ABSTARCT

3. CIRCUIT DIAGRAM

4. REAL WORLD DIAGRAM

5. ART WORK

6. PCB DESIGNING

7. COMPONENTS

8. WORKING

9. CIRCUIT PROCEDURE

10.CONCLUSION



INTRODUCTION

While travelling by a train or bus,we generally lock our

luggage using a chain-and-lock arrangement.

But, still we are under tension, apprehendingthat somebody may cut the chain and steal our luggage.

Here is a simple circuit to alarm you when somebody

tries to cut the chain.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 30to 40 SWG, 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, transistorT1 gets forward biased to

extend the positive supply to the alarm circuit.In idle

mode, the power consumption of the circuit is

minimum and thus it can be used for hundreds of travel

hours.



CIRCUIT DIAGRAM



REAL WORLD DIAGRAM



ART WORK



PCB DESIGNING

INTRODUCTION:-

A Printed Circuit Boards (PCB) is a

rugged, copper and non-conductive substrate based structure

to connect electrical components (for example the green

board inside a common electrical appliance is a PCB). The

PCB is the backbone of electrical devices, allowing you to

connect passive (resistor, inductor, capacitors etc…), active

(operational amplifiers etc…) and embedded devices

together, into specific form factors to fit the design need.

Connections between the components are made throughcopper connections (routes) which become passageways for

electrical signals.

COPPER ROUTING:-

Copper routes on a Printed Circuit

Board are responsible for conducting the electrical signal

throughout the board, to various components and connectors.

The copper is created either by layering copper on the

completed board surface(s) and etching away excess copper

to create the copper pathways. These etchings are created by

placing a temporary “mask” over areas of copper routes, and

then removing all unwanted copper.



DRILLING HOLES:-

In order to create pathways of

signals to various layers on a board, or to create regions to

attach components on a board, you do need to drill holes on a

board. A plated through hole (PTH) in a printed circuit board

is called a via and allows you to provide electrical connection

between a copper route on one layer of a PCB, to copper on

another layer. There are various types of vias. A blind

via starts on one outer layer of a PCB, but ends at an inner

layer (i.e. it does not completely pass through the board).

A buried via connects copper routes on two inner layers of a

board (i.e. it does not connect at the surface level of a board).Holes for vias are “drilled” using either a fine drill bit, or in

the case of very small microvias with a laser.

COMPONENTS ON PCB:-

Components on PCB

are the semiconductor devices that together allow you to

perform specific design actions (filtering, amplification

etc…). Components are either through-hole technology

(THT) components or surface mount devices (SMD).



THT parts are generally larger in size and were ubiquitous in

design until the late 1980’s when SMD parts became more

widely used. THT have longer pins that are basically inserted

into drilled holes and soldered one-by-one onto the PCB.

SMD parts are (generally) much smaller in size and allow you

to solder much smaller leads to the surface of a PCB. By

having the SMD parts soldered to the surface of a PCB,

engineers can attach parts to either surface (top or bottom) of

a PCB, rather than having to solder through-hole parts.



COMPONENTS

S.NO. COMPONENTS RATING QTY.

1. SUPPLY 9 v 1

2. RESISTANCE 1 kΩ & 330kΩ 3

3. INTEGRATED CKT UM3561 1

4. ZENER DIODE 3.1v 1

5. TRANSISTOR BC 548 2

6. LOUD SPEAKER 8Ω ,2.5w 1



WORKING

INTEGRATED CIRCUIT:-

1.FEATURES:-• Four sounds can be selected.

• Typical 3v operating voltage.

• RC oscillator with an external resistor.

• A magnetic speaker can be driven by connecting an

NPN transistor.

• Power on reset.

2.GENERAL DESCRIPTION:-

The UM3561 is low cost,low power CMOS LSI designed for use in toy application.Since the

integrated circuit includes oscillator and selector circuits,a

compact sound module can be constructed with only a few

additional components.The UM3561 contains a programmed

mask ROM to simulate siren sound.



3.Absolute Maximum Ratings:-

DC Supply Voltage ..... -0.3V to +5.0V

Input Voltage.....Vss-0.3V to Vdd+0.3V

Ambient Temperature -10 C to

+60 C

4.Electrical Characteristics:-

(Vdd=3V, Vss=0V, Ta=25 C, Fosc=106496Hz unless otherwise specified.)

Parameter Symbol Min. Typ. Max.

Operating voltage Vdd 2.4V 3V 3.6V

Operating Current Idd - - 150A

“H” Input Voltage Vih Vdd-0.2 - Vdd

“L” Input Voltage Vil Vss - Vss+0.2

Frequency Stability ∆F/F - - 20%

Output Current Io/p 3mA - -

Frequency Deviation ∆F/F -10% - +10%



5. Playing Modes:-

SEL1 SEL2 Sound Effect

NC NC Police Siren

Vdd NC Fire Engine Siren

Vss NC Ambulance Siren

X Vdd Machine Gun

NC : No Connection

X : Don’t Care



6.Pin Configuration:-



Circuit Procedure

Unless the terminals of zener diode are open circuited,the alarm

will not ring as the terminals of zener diode become open

circuited the alarm stats ringing because source provides it asupply of 9v, but there is a voltage drop at 1kΩ

resistance,approax 2.46v to 3v supply provided to the input of

UM3561 at pin-3 which is input of integrated circuit.

A amplify circuit which is used to amplify

sound is connected to the pin-5 which is output of IC,is

connected to the loud speaker,as the chain is broken the soundwill start flowing in the air.

If after voltage drop at 1kΩ

resistance,provided supply is reached above 3.1v, then zener

diode will become activate which is connected in parallel form

with IC and hole current will pass through it.

SO,IC will be saved itself because above

3.1v supply IC will not work and will be reuined.



Conclusion

Here is a handy gadget for securing the luggage while travelling

in the train,bus etc.

Open circuited form of terminal A and B in turn to switch

the power supply of 9v to integrated circuit at the same time the

buzzer beeps .

A and B are the terminal which is connected to the security

chain as someone breaks the chain this becomes open circuited

and the whole phenomena is repeated.

Prashant Project 2

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