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.