Conclusion.

We can conclude that we was able to successfully create a police Siren that used a 12V power source supplied. We also able to know how to use the live wire software in our assignment and know how to produce a current that flow in a police siren circuit. Beside that, we was able to studied about the electronic component and their function such as concept of resistor and the concept of capacitor. Other than that, we able to understand more how to indentify the current, resistance and voltage that used in police siren circuit by using the particular formula such as ohm’s law I = V/R. We also used the series parallel circuit in this assignment. this project should used 555 timers IC to generate a sound similar to the police siren. The first timer is configured as a square wave close to 1 Hz a stable oscillator. The output of this timer is used to feed the control voltage of the second timer where it is subjected to frequency modulation. This frequency modulation will generate a tone similar to the siren used by the police. By adding LEDs at the appropriate places we can produce an exact police siren effect with flashing LEDs. Finally, we had learnt and familiar with the construction and designing in electronic circuit and we applied it practically.