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I normally connect a Piezo via a 100nF Capacitor (same sort I use for decoupling on my PCB's) because I once met a brand of Piezo's that randomly 'hung' when connected directly. See schematic. The Higher drive level option requires having one pin go High and the other Low alternatively. You can achieve this by manipulating the pins directly (you won't drive this conventionally 'as is' by using the PWM or HPWM commands).
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Thank you very much Melanie!
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More PIC Piezo Questions
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.
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Originally Posted by steve@lumicycle
Pls read this:
http://www.picbasic.co.uk/forum/showthread.php?t=4796
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"If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
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loud buzzer or sounder
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
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chk the link above.
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