I was curious about experiences people had driving piezo buzzers directly from an AVR port pin or if a transistor interface is really needed.
I've got a project where the piezo is pretty important and we're moving out of prototype stage into small volume. Before I send out the boards, I was wondering if people had much experience with this and if direct drive was likely to cause failure later on.
The prototypes are working fine and have been since last summer but there was recently another post here where a Freaks member was thinking the piezo damaged his port pins.
I'll build-up another prototype this weekend and scope it out and see if I see any excursions too big (provided my scope can see them) but I wanted to also ask here since there are so many varied experiences to have insight.
So, transistor interface to a tiny piezo buzzer necessary? (CUI CEP-1160, BUZZER PIEZO 4KHZ 14MM EXT DRIVE)
Thanks for any input...