thank you very much, what does a piezo sensor do?

 

It's a type of solid-state transducer that is typically used as a small loudspeaker but can also be used as a microphone or vibration/shock sensor.

 

It's a type of solid-state transducer that is typically used as a small loudspeaker but can also be used as a microphone or vibration/shock sensor.

that's excellent thanks I am going to build my own camera and I need to find out what all the parts are, yiuve been a great help. smiley face

 

Well, that shows a beeper and a transistor(?). Where are the battery and mystery bits?

 

Well, that shows a beeper and a transistor(?). Where are the battery and mystery bits?

they are the mystery bits I didn't no what they were