Description
The Passive Buzzer Module is a compact audio output device designed for applications requiring customizable tone generation. Unlike active buzzers, this passive piezo buzzer does not contain a built-in oscillator and must be driven by an external signal, typically a square wave generated by a microcontroller such as an Arduino, ESP32, or similar development board.
Key Features
- Passive Piezo Buzzer: Requires external frequency signal for tone generation
- Wide Voltage Range: Operates from 3V to 5V DC
- Integrated Driver Circuit: Uses a 9012 PNP transistor for efficient switching
- PWM Compatible: Supports tone generation via microcontroller PWM pins
- Easy Mounting: Includes fixing bolt holes for secure installation
- Compact PCB Design: Suitable for embedded and DIY electronics projects
Specification
- Working Voltage: 3V – 5V DC
- Signal Requirement: 2–5 kHz square wave input
- Interface Type: 3-wire connection
- VCC: 3.3V–5V power supply
- GND: Ground
- I/O: Control signal input (PWM-capable pin recommended)
- Driver Transistor: 9012 PNP
- PCB Dimensions: 3.0 cm × 1.3 cm
- Weight: Approx. 0.03 kg
Application
- Microcontroller projects (Arduino, ESP, STM32, etc.)
- Alarm and alert systems
- User interface sound indicators
- Robotics and automation
- Educational electronics kits
- DIY embedded systems