جهاز تنبيه نشط KY-012 3 دبوس 3V/5V دوپونت

Plugged this into a breadboard with a 5V supply and the tone was loud and clear immediately, no extra parts needed. The 3-pin Dupont layout also made it dead simple to daisy-chain into my alarm circuit. Exactly what I needed for a quick prototype.

Being able to feed it 3V or 5V meant I didn't have to rewire my breadboard when switching between two Arduino clones, and it's loud enough to hear across the room for a small alarm. The 3-pin Dupont header makes it plug-and-play, which saved me a ton of soldering time.

Swapped this into a 5V circuit and it’s plenty loud for a project alarm, no extra driver needed since the module handles it. The 3-pin header made wiring a breeze with dupont cables—exactly what I needed for a quick breadboard test.