U132 · M5Stack
Unit Buzzer is a passive buzzer expansion unit, driven by a 4KHz frequency signal. When powered at the rated voltage, the sound pressure level can reach 72dB within 10cm. It is characterized by its compact size, low power consumption, good sound effect, and built-in protective casing, making it suitable for various buzzer alarm scenarios. Features Drive Signal: 4KHz oscillation frequency Sound pressure level 72dB (at 10cm rated voltage) Drive signal: 4KHz 1/2 duty square wave Includes 1 x… (M5Stack U132)
| Part number | U132 |
|---|---|
| Manufacturer | M5Stack |
| Category | Audio › Speakers & Buzzers |
| Pins | 4 |
Passive Buzzer Unit pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | SIG1 | bidirectional | PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map |
| 2 | SIG2 | bidirectional | PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map |
| 3 | 5V | power | |
| 4 | GND | ground |
Schematic symbol and footprint
Schematic symbol
Footprint: Grove HY2.0 4-pin through-hole, 2.0 mm pitch — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
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