I was so glad to have found these for my projects. I don't need a huge sound and these worked loud enough in a typical situation - when I was in a crowded room though it wouldn't be loud enough - but that's fine for what I needed them for. Very easy to get working in Arduino, just connecting the Red (Power) wire to the pin you are using and the Black ... Read more
Great piezzo buzzers that are offered for a very reasonable price! I don't really see any cons. Great product! The only thing you might want to keep in mind is that the arduino (which I used them with) can only supply 5V of power but the buzzers are optimized for 9V therefore they can sound a bit weak (not too much of a problem in my opinion, though)... Read more
Those device are easy to use with Arduino. They are cheap, and can play melodies, or make alarm noise. As it needs 9V, sound is pretty weak using Arduino. They are really small and do not provides a clear sound. Consider to add power on them when using with Arduino, as 5V DC is not enough to let it play clearly.
I used them as a feedback "bip"... Read more
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