ET-A16
Passive Buzzer Board
MOSFET-driven buzzer for tones and alarms
AED 9.00
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Overview
MOSFET-driven buzzer for tones and alarms
The ET-A16 is built around the Electromagnetic passive, 2.7kHz resonance, 85dB @10cm.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Alarms and timers
- Melodies with tone()
- UI beeps
Key features
What makes it different
Buzzer
Electromagnetic passive, 2.7kHz resonance, 85dB @10cm
Driver
AO3400A low-side + flyback diode; gate pull-down
Use
Melodies with Arduino tone(), alarms, UI clicks — any frequency
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Buzzer | Electromagnetic passive, 2.7kHz resonance, 85dB @10cm |
|---|---|
| Driver | AO3400A low-side + flyback diode; gate pull-down |
| Use | Melodies with Arduino tone(), alarms, UI clicks — any frequency |
| Size | 17.8 × 17.8 mm |
|---|---|
| Mounting | 1 mounting hole (M2.5) |
| Connectors | 3-pin 2.54 mm header |
| Main IC | MLT-8530 (LCSC C94599) |
| Revision | Rev A |
Performance
Loudness
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5V |
| 2 | GND | Ground | Ground |
| 3 | SIG | Control | PWM / tone(), 3.3V or 5V logic |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-A16 Passive Buzzer Board (assembled)
- 1 × 3-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, SIG
Compare
Which output accessory?
| Passive Buzzer Board (this board)This board | ET-A17 74HC595 Shift Register | |
|---|---|---|
| What it does | MOSFET-driven buzzer for tones and alarms | 8 extra outputs from 3 pins, chainable |
| Interface | — | — |
| Best for | Alarms and timers | Driving many LEDs |
| Price | 9 AED | 14 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.