Buzzer 5V

Buzzer 5V

Buzzers
BUZ024
€0.90
Out of Stock
5V electromagnetic buzzer with built-in generator, continuous 2.3 kHz tone, 85 dB output. Works from 3–7 V, mounts directly on PCB or breadboard. Ideal for Arduino and educational projects.

Quantity Price
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The 5V Electromagnetic Buzzer (Ref: BUZ024) is a self-driven, through-hole buzzer with a built-in oscillator circuit — meaning it produces a continuous 2.3 kHz tone as soon as voltage is applied, no external signal generation required. Operating across a wide 3–7 V supply range with a nominal 5 V, it fits naturally into 5 V microcontroller systems. Its compact ø12 × 9.5 mm form factor and standard through-hole pins make it a practical choice for PCB integration or breadboard prototyping.

Key Features

  • Built-in Generator: Produces a continuous tone without any PWM signal from the microcontroller → simplifies firmware
  • Wide Supply Range (3–7 V): Tolerates voltage fluctuations → reliable in battery-powered and regulated-supply designs
  • 85 dB Sound Output @ 30 cm: Loud enough for audible alerts in typical workshop or classroom environments → effective feedback without amplification
  • 2.3 kHz Operating Frequency: Sits within the most sensitive range of human hearing → maximises perceived loudness at minimal power
  • 30 mA Current Consumption: Driveable directly from a microcontroller I/O pin via a transistor or directly where pin current limits allow → no extra driver IC needed in many designs
  • Through-Hole PCB Mount: Standard pin spacing for easy soldering or breadboard insertion → quick prototyping and permanent installation
  • Compact Size (ø12 × 9.5 mm, 2 g): Minimal board footprint → fits space-constrained enclosures

Pinout & Wiring

PINSymbolDescription
Long lead (+)VCCPositive supply — connect to 3–7 V (typically 5 V)
Short lead (−)GNDGround — connect to system GND

Wiring note: Because the buzzer draws up to 30 mA, drive it through an NPN transistor (e.g. 2N2222 or BC547) controlled by a digital I/O pin when using microcontrollers with a 20–40 mA pin current limit. Connect the I/O pin → base resistor (1 kΩ) → transistor base; collector → buzzer (−); emitter → GND; buzzer (+) → 5 V.

Compatibility

  • Arduino UNO / Nano / Mega (5 V): Direct voltage match — use a transistor driver to stay within safe I/O pin current limits.
  • ESP32 / ESP8266 / Raspberry Pi (3.3 V logic): The buzzer operates down to 3 V, so a 3.3 V supply will activate it; use a transistor to protect the 3.3 V I/O pin from the 30 mA draw.
  • Standalone / Battery circuits: Compatible with 3× AA (4.5 V) or single Li-ion (3.7 V) supplies within the 3–7 V range.

Typical Applications

  • Arduino alarm & notification projects: Sound a tone when a sensor threshold is crossed (temperature, motion, water level).
  • Educational kits & STEM workshops: Introduce students to basic output devices and transistor switching circuits.
  • Breadboard & prototype testing: Quick audible confirmation that a circuit condition has been met during development.
  • Door / access control indicators: Simple open/close or access-granted/denied beep feedback.
  • Timer & countdown alerts: End-of-cycle signal in DIY kitchen timers or lab equipment.

Technical Specifications

ParameterValue
Emitter TypeElectromagnetic, with built-in generator
Signal TypeContinuous tone
Supply Voltage3–7 V DC
Nominal Operating Voltage5 V DC
Current Consumption30 mA
Operating Frequency2.3 kHz
Sound Pressure Level85 dB @ 30 cm
Mounting MethodThrough-hole, on-board (PCB)
Dimensionsø12 × 9.5 mm
Weight2 g
SKU / ReferenceBUZ024

FAQ

Q: Do I need to send a PWM signal from my Arduino to make it beep?
A: No. This buzzer has a built-in generator, so it produces a continuous 2.3 kHz tone as soon as power is applied. Simply switch the supply voltage on/off (via a transistor or relay) to control it.

Q: Can I use this buzzer with a 3.3 V ESP32?
A: Yes — the buzzer operates from 3 V upward. Use an NPN transistor controlled by the ESP32 I/O pin so the 30 mA load current does not flow through the microcontroller pin directly.

Package contents: 1 × 5V Electromagnetic Buzzer (BUZ024)

⚠ Note: Do not exceed 7 V supply voltage. Always verify pin polarity (long lead = +) before powering up to avoid damage.
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