Sirens

Hello,

today i'm gonna show you how to make this sirens that is really loud

the video is in my youtube channel Chris' Project. link:

The components for this project are:

1pc 9V battery

2pc buzzers

2pc 10k resistors

2pc 100uf capacitors

2pc leds

2pc 470 ohm resistors

2pc BC547 Transistors

and a 9V battery clip

First connect the positive pin of the buzzer to the positive pin of the led and the negative pin of the buzzer is connected to the negative pin of the led. Then connect the 470 ohm resistor to the positive pin of the led and the buzzer. Then the neegative pin of the led and the buzzer is connected to the 100uf capacitor and it's connected to the collector pin of the BC547. And the negative pin of 100uf capacitor is connected to the 10k resistor. And make two of these.

Finally the base pin of the BC547 is connected to the negative pin 100uf capacitor and the other BC547 base pin is connected to the other negative pin of the 100uf capacitor. And the 2 BC547 emitter pin is connected together and it's connected to the negative wire of the 9V battery clip. The two 470 ohm resistors is connected together with the 10k resistor and it's connected to the positive wire of the 9V battery clip. And we are done.

Now i'm just gonna plug in the 9V battery and it's all work well. so please like and share this Instructable, until next time bye