Police Siren using a Transistor DIY by Manmohan Pal

How to make Police Siren using a NPN Transistor

Video Link : https://www.youtube.com/watch?v=fUmEKRTb_kc

List of Components

NPN Transistor BC 547   x              1

Buzzer                              x              1

RGB LED                         x              1

Resistor 330 Ohm             x              1

Resistor 220 Ohm             x              1

Circuit Diagram

Steps

1)      Place Transistor on bread board

2)      Connect 330 Ohm resistor between base and emitter of BC 547

3)      Connect RGB LED between Base and Collector of the transistor

4)      Connect  a Buzzer with collector

5)      Place a resistor 220 Ohm parallel to the Buzzer

6)      Batter connecter such that +ve on the buzzer and –ve at the Emitter of the transistor

Manmohan Pal

Email: mannmohanpal@gmail.com

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