buzzer

Hi all, Not sure this is the right place but Im looking for some expertise/help in understanding design of a simple circuit. Im looking to make something that would make a noise after being triggered by either impact or a magnet. Looking for this to be very very small also. Smaller than a...

I am a novice. I need a device that will beep once when my 220V goes off, and maybe beep twice (or make a different sound) when the power goes on again. No reset buttons or switches needed. I just need to be alerted. Any help with a circuit diagram and part names will be much appreciated. I...