need suggestion circuit.

[aarviii]

can you please give me a circuit which i can use transistor as a switch, where my input will be vibration and will be detected by a sensor and my output will be light/sound? please help me

 

[barry]

We need more information. What's the output of your sensor? What's the power requirement of your light/sound? If you do a simple internet search of "transistor switch" you'll be buried with information.

Maybe you should just post a question about how to use the internet.

 

[aarviii]

the output of sensor will can be light or sound and the power requirement will be 9v-12v. i know there's a lot on internet but i don't know what to choose. sorry.

 

[barry]

No, you said you had a sensor to detect vibration, what's that? Or do you want us to specify that, too? And 9V-12V is not a power spec, that's a voltage spec. How many AMPS will your load need? 1? A billion?

 

[tpetar]

can you please give me a circuit which i can use transistor as a switch, where my input will be vibration and will be detected by a sensor and my output will be light/sound? please help me

See these projects, its not made just from one transistor but is quite simple to make:

Vibration Sensor Kit
https://www.jameco.com/Jameco/PressRoom/recipe4.html

Simple Knock Alarm With Piezo Sensor
**broken link removed**