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Buzzer Module KY-012 Active

Buzzer Module KY-012 Active

The KY-012 Active Buzzer Sensor Module is a simple electronic component designed to emit sound when powered. Unlike a passive buzzer that requires a PWM signal to generate tone, the active buzzer includes a built-in oscillator. This allows it to produce sound continuously or intermittently with just a DC power source, making it ideal for alarms, notifications, and alert systems.

Commonly found in electronic boards, computers, multimeters, and consumer devices, this module is compatible with microcontroller platforms such as Arduino. The KY-012 makes it easy to incorporate sound effects or audio signals into your electronic projects without complex circuitry.

Package Includes

  • 1 x KY-012 Active Buzzer Sensor Module

Active Buzzer
6.30 AED 6.30 AED (Tax included)

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How It Works

The KY-012 Active Buzzer is built around either an electromagnet or a piezoelectric disk and a metal diaphragm. When powered:

  • In the electromagnetic type, current flows through a coil, creating a magnetic field that vibrates the steel diaphragm to produce sound.
  • In the piezoelectric type, current causes the disk to enter into resonance, generating ultrasonic vibrations that are amplified by the metal diaphragm.

This internal mechanism allows the buzzer to emit a steady tone without external frequency input. To produce varied tones or sequences, you can control the on/off cycle using a microcontroller.

Technical Specifications

  • Type: Active Buzzer Sensor
  • Model Number: KY-012
  • Height: 18.5 mm
  • Length: 16 mm
  • Width: 10 mm
  • Operating Voltage: 3.5V – 5.5V
  • Maximum Current: 30 mA at 5V
  • Resonance Frequency: 2500 Hz ± 300 Hz
  • Minimum Sound Output: 85 dB at 10 cm
  • Operating Temperature: -20°C to 70°C (–4°F to 158°F)
  • Storage Temperature: -30°C to 105°C (–22°F to 221°F)

Applications

  • Warning systems and alarms
  • Sound notifications in microcontroller projects
  • Multimeters and electronic diagnostic tools
  • Buzzers for consumer electronics
  • Tone generation in Arduino-based projects