Circuit request for sound sensing using transistor (simple circute)

[crouserali]

hello to every one
Is ther is a simple circute with sound sensing?
using a transistor with such feture?
thanks

 

[amitjagtap]

If I m not wrong, Basically you need an Audio preamplifier using transistor.
Check this:1) **broken link removed**
2) Audio Preamplifier 2 | CircuitDiagram.Org

 

[crouserali]

Thank you
The tranasistor should work as a switsh triggerd by any audio signal as the the transistor is connected to a relay or to activate a small lightand i was wondring if there is an IC that can do this?
best regards

 

[Embedded_Geek]

Toggling the output can be also done with 4013 IC

 

[amitjagtap]

Hmm, well you can IC555 to generate ON/OFF signal when sound is generated. The preamplifier output can be given to trigger pin of IC555. Trigger levels can be adjusted with respective register.

Search for more 555 based circuits its easily available.