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This active buzzer module is built for straightforward audio signaling: as the listing describes it, an active buzzer rings out as long as it is electrified, meaning it needs no special signal shape or frequency, unlike a passive buzzer, just a steady voltage to produce its fixed tone. That makes it well suited to alarm devices, timers, and confirming user input such as a mouse click or keystroke, wherever a simple, reliable beep is all that's needed.
An 8550 transistor forms the drive stage on the module, handling the buzzer element's current draw so that a microcontroller's own output pin, which typically can't supply much current directly, only needs to switch that transistor on and off rather than driving the buzzer element itself.
The module uses a simple 3-wire interface, compatible with 3.3V to 5V logic, and its operating voltage sits comfortably in that same 3.3V to 5V range, making it directly usable from both common microcontroller logic families without a level shifter or extra driver circuit. Programming it is straightforward, since a high-low output from a microcontroller pin is enough to turn the tone on and off, described in the listing as an SCM (single-chip microcontroller) letting the module sound a simple high-low tone.
PCB dimensions are 34.28mm by 13.29mm by 11.5mm, and a fixed bolt hole with a 2.6mm aperture makes it easy to mount securely inside an enclosure or onto a panel where a permanent audio alert is needed.
Arduino and microcontroller projects needing a simple, reliable beep for alarms, timers or input confirmation, without needing to generate a tone signal in code, will find this active buzzer module the more straightforward choice compared to a passive one.
It produces a single fixed tone whenever powered, with no need to generate a specific signal frequency.
3.3V to 5V.
With a simple high-low digital output from a microcontroller pin.
An 8550 transistor drive stage.
Through a fixed bolt hole with a 2.6mm aperture.
| Brand | Generic |
|---|---|
| Selling unit | PCS |
