ALLNET 4duino Active Buzzer Module (ALL_OY_3153)

The ALLNET 4duino Active Buzzer Module (ALL_OY_3153) is a compact, easy-to-use sound module designed for microcontroller projects. It produces a fixed 2.5 kHz continuous tone when a digital high signal is applied, making it ideal for alarms, notifications, and user feedback in Arduino, Raspberry Pi, ESP32, and other embedded systems.

Advantages

Active buzzer modules require only a DC voltage to produce sound, simplifying control compared to passive buzzers that need a PWM signal. The built-in oscillator ensures a consistent tone without additional programming. With a sound pressure level exceeding 85 dB at 10 cm, it provides clear audible alerts even in noisy environments. The 3-pin interface (VCC, GND, Signal) allows direct connection to digital I/O pins, and the compact 18.5 x 15 mm footprint fits breadboards and PCBs easily.

Suitable for

• Arduino and compatible development boards
• Raspberry Pi GPIO projects
• ESP32 and ESP8266 IoT devices
• STM32 and other microcontroller platforms
• Alarm systems, timers, and status indicators
• Educational electronics kits

Key specifications

• Buzzer Type: Active (built-in oscillator)
• Operating Voltage: 3.3V - 5V DC
• Operating Current: < 30 mA
• Output Frequency: Approx. 2.5 kHz (fixed)
• Sound Pressure Level: > 85 dB at 10 cm
• Control Interface: Digital I/O (high = on, low = off)
• Number of Pins: 3 (VCC, GND, Signal)
• Module Dimensions: 18.5 mm x 15 mm
• Operating Temperature: -20°C to +70°C
• Mounting: Through-hole pins for breadboard/PCB
• Module Designation: OY-3153

Recommendations

For best results, connect the Signal pin to a digital output pin on your microcontroller. Use a current-limiting resistor if required by your specific board (typically not needed for 3.3V/5V logic). This module is not suitable for variable tone generation; for melodies, consider a passive buzzer.