Thread: bells, buzzers, and whistles
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Unread 27-12-2010, 15:59
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Re: bells, buzzers, and whistles
Do you think it makes a difference in this case if I use a linear op-amp vs a transistor? I would expect them to perform the same if there's only 2 states: 0v and 5v.

How do you determine the capacitor size? (Because the GPIO are pulled high, I could burn up the speaker without a capacitor if I was running a program that didn't set that channel low. I suppose the other way would be to use a MOSFET. I have plenty of those from Jaguar's I've burnt up.)

EDIT:
I've never heard of a piezoelectric speaker having 3 wires. How does that work?
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Last edited by kamocat : 27-12-2010 at 16:10.