Gikfun5V 2 Terminals Passive Electronic Buzzer for Arduino (Pack of 10pcs) EK2146

reliable product

These are the simplest way of generating tones with an Arduino (or a 555 timer or other digital signal source.) You simply hook one lead to a signal pin and ground the other lead. Then on the Arduino, use the tone command to send a specific frequency to the signal pin you chose. The tone command also lets you specify the duration of the tone. It works great as a method to "beep" when a task is complete, but this isn't an audio speaker. It's a piezo device which is playing square waves sent via digital pins. Trying to play music through one of these would sound horrible. One note about the loudness. I had this on a breadboard last night and it was alternating between 1kHz and 2kHz tones. Since it was late, I tried putting my finger over the hole on top to "muffle" the sound a bit. This has always worked on larger piezo emitters I've used in the past. On this particular device covering the little hole actually made it significantly louder. Huh!?! Other than that little oddity, these little emitters are a true bargain. They work quite well and are dirt cheap. They're also nice and compact, taking up minimal space on a breadboard or circuit board. Highly recommended.

Got just for tinkering to add passive rttl buzzer to esp32 running esphome. Can play random ringtones in kids bedroom now!

Only thing wrong was the pins could be a little longer. I use them with Dupont wires rather than soldering to a board, so longer pins work more reliably. Otherwise they were fine.

I need a Piezo buzzer for a project. I loved that these were affordable, and delivered the next day. They work fine for my purpose, I will not that they each sound a bit different from each other, so if you plan to use more than one together or if consistency is otherwise important to you, these won't work. Additionally, the tops were glued on a rotated angle, so the "+" is not actually where the pin is.Again, they work, they are cheap, they came right away, but the quality is pretty low.

Not sure if I'm putting the wrong volts in but the buzzers I got just click.

The most these "buzzers" do is emit a low ticking noise that's barely audible. On top of that, the quality control of the "buzzers" are terrible. Some don't even work in the package. Buy a different product of buzzers, you'll thank me later.

Had a problem with the order but Gikfun made it right! Will do business again