Geophone with sound

antonv

Joined Nov 27, 2012
148
How do you want the sound to work? Should it turn on at a certain level or should it change as the level increases?
 

antonv

Joined Nov 27, 2012
148
How about a circuit like the one I attached.

I don't know how much current your buzzer requires. You may have to reduce R1's value to get Q1 to turn on all the way (<0.5 V across its collector and emitter).

Q1 has a maximum collector current of 600 mA but I would not use it for more than 400 or 500 mA.
 

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