SFM-27 buzzer with generator 3-24V 12V intermittent tone reversing signal 75dB

SFM-27 buzzer with intermittent tone generator

A buzzer with a pulsating tone generator is a universal signaling device, ideal for a wide range of electronic projects and as a reversing indicator in vehicles. When connected to a DC source in the wide range of 3V - 24V DC, the module generates an intermittent sound signal at approximately 1 Hz. The module is fully compatible with popular microcontroller platforms and works well with Arduino, ESP8266, ESP32, and Raspberry Pi.

Key technical specifications

• Operating voltage: 3-24V DC
• Loudness: 85dB
• Current draw: 18mA
• Sound frequency: 3.3kHz ±500Hz
• Pulsation frequency: approximately 1 Hz
• Dimensions: diameter 30mm, height 15mm
• Mounting: pre-attached leads

Example applications

• Reversing indication in cars, forklifts, and agricultural machinery
• Audible alerts in alarm systems and motion sensors
• Error or process completion signaling in Arduino and Raspberry Pi projects
• Notifications in home automation systems based on ESP32 or ESP8266 modules
• Acoustic signaling in toys, models, and portable devices

Benefits

• Power versatility: operation across a wide voltage range from 3V to 24V DC allows use in many different circuits without additional converters.
• High audibility: a sound level of 85dB ensures the warning signal is heard even in noisy environments.
• Ready to use: the built-in pulsating tone generator eliminates the need for external modulation circuits-just apply voltage.
• Low load on the circuit: a current draw of only 18mA enables energy-efficient operation and easy control with simple transistors.
• Easy installation: a compact housing and factory-attached leads significantly shorten mounting time in the target device.

The SFM-27 buzzer with a pulsating tone generator is a reliable, efficient component for acoustic signaling, suited to both professional industrial applications and hobby electronics projects.