Design Of Police Siren Using NE555

CLASS WORK PROJECT 

DESIGN OF POLICE SIREN USING NE555 
 
Introduction
A siren is a loud noise making device.

Sirens are mounted in fixed locations and used to warn of natural disasters or attacks.

Sirens are used on emergency service vehicles such as ambulances, police cars and fire tracks

Background
This police siren simulated electronic project uses two 555timers IC to generate a sound similar to a police siren.

A single 556 timer IC which consists of two 555 timers can also be used. In this circuit both of the timers are configured as a stable circuit.

Problem Statement
Due to the need to alert people in case of emergencies such as police vehicles and ambulances.

Significance of the project
The whole idea of the siren was to alert the public about emergency cases. The Siren finds application in police vehicles, ambulances.

General Objective
The general objective of this project was to understand the operation of a siren. By making a run up of the project, theoretical knowledge was transferred into practice and during the hardware implementation, practical skills such as a printed board implementation, circuit testing and soldering were enhanced.

Specific Objective
To design a simple Police siren.

Scope of the study
The project only focuses on producing loud sound which brings about sound pollution to the environment. Some instruments such as bazar where hard to find and  generally expensive.

It took us a lot of time to make a working siren without mistake.

Circuit diagram:

Materials and Quantity 

Capacitors  
100µF    1          
100nF    1   
1µF        1   
10µF      1 

Resistors  
68KΩ     2 
8.2KΩ    2  
1KΩ       1  

Diode  
1BH62    1  

IC    NE555    2  

Buzzer  
64 ohm, 500mW    1  

Battery  
10v    1  

LED  
Red &blue    2

Variable resistor        1  

Print board        1

Jumpers
   
Switch        1    

TUMUSIIME BENON      
SEKITTI HAMIS     
ARYAMANYA EDWIN       
SEGUYA ENOCK      
SISYE GARVIN      
KASAMBA GEORGE     
ANGURIA MAX     
MUTABAZI  ARBAN     
KIBALAMA JOEL    
SITAKU OSCAR     
UMA STEPHEN      
ARIHO LEWIS