This Passive Buzzer Module is designed for embedded applications that require customizable audio signaling. Unlike active buzzers, this module does not have an internal oscillator and must be driven by a square wave signal within the 2KHz to 5KHz range, allowing full control over tone and pattern output. Powered by an S8550 transistor, this module supports both 3.3V and 5V systems, making it compatible with a wide range of microcontrollers including Arduino and ESP-based platforms.

The board includes a convenient fixed bolt hole for secure mounting and a compact PCB footprint (32.3mm x 13.1mm). Its simple 3-wire interface (VCC, GND, I/O) enables easy integration and control, with the possibility of sharing I/O lines with LEDs in certain applications. Ideal for projects requiring flexible audio feedback such as alarms, alerts, or interactive systems.

Key Features:

• Customizable sound output via external PWM control
• Wide compatibility with 3.3V and 5V microcontrollers
• Integrated S8550 transistor for reliable drive capability
• Compact design with mounting hole for easy installation
• Can share I/O with LED in special applications

Technical Specifications:

• Operating Voltage: 3.3V – 5V
• Sound Frequency Input: 2KHz – 5KHz square wave
• Driver: S8550 transistor
• Interface: 3-pin (VCC, GND, I/O)
• PCB Dimensions: 32.3mm x 13.1mm
• Mounting: Fixed bolt hole