How to connect Buzzer to PIC?

[steve@lumicycle]

I read your thread about getting a piezo buzzer to work on the pic. This I have done. However what I don't understand is why you can't drive the piezo very loudly through a mosfet. It doesn't really work at all just a faint noise. however if a 1k resistor is connected in series with the piezo it works ok but not that loudly. I think the frequency is OK. driving a loudspeaker through the mosfet works fine. There must be something about driving a piezo i don't understand. Any help gratefully received.

[sayzer]

I read your thread about getting a piezo buzzer to work on the pic. This I have done. However what I don't understand is why you can't drive the piezo very loudly through a mosfet. It doesn't really work at all just a faint noise. however if a 1k resistor is connected in series with the piezo it works ok but not that loudly. I think the frequency is OK. driving a loudspeaker through the mosfet works fine. There must be something about driving a piezo i don't understand. Any help gratefully received.

Pls read this:
http://www.picbasic.co.uk/forum/showthread.php?t=4796


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[hoops2006]

Hey guys

im trying to make myself a boxing round timer. Im just about there but im have a bit of trouble with getting a buzzer or sounder loud enough. It needs to be loud enough to be heard over music. im using a 9v battery. My smoke alarm uses a 9v battery and thats loud as hell so the most be some way of doing it. any help much appreciated.

Hoops

[sayzer]

chk the link above.

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