# Active Buzzer (5V)

**Type:** Product page · **SKU:** CE09882 · **Brand:** [Core Electronics](https://core-electronics.com.au/brands/core-electronics-australia)
**Page:** https://core-electronics.com.au/active-buzzer-5v.html ([markdown](https://core-electronics.com.au/active-buzzer-5v.html.md))

Apply a voltage and hear a tone! This active buzzer doesn't require any external circuitry like a passive buzzer.

## Pricing

- **Price:** $0.38 (inc GST) — $0.35 AUD, exc GST
- **Quantity discounts:** 5+ $0.34 (exc GST) · 15+ $0.33 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 96 today; more stock is typically available with a 8–12 day lead time.

## Description

This 5V active piezo buzzer is an easy-to-use sound solution for your electronics projects. Inside is a tiny piezoelectric crystal that flexes when voltage is applied, generating sound. Unlike a passive buzzer, this active version includes a built-in oscillation circuit—so it can produce a steady tone automatically when powered. Simply apply 5V, and it will emit a clear, loud beep without any need for a PWM signal or frequency control from your microcontroller.

Perfect for adding audible alerts, alarms, or feedback to embedded systems, this buzzer is compact, reliable, and breadboard-friendly. Just connect the positive and ground pins to power, and you’re ready to go.

### Specifications

- **Operating voltage:** 5V DC
- **Sound type:** Continuous tone (built-in oscillator)
- **Diameter:** 11mm
- **Height:** 9mm
- **Lead length:** 5mm
- **Typical sound level:** ~85dB @ 10cm (approx.)
- **Mounting:** Breadboard or PCB compatible
- **Polarity:** Marked “+” for easy connection
 
### Usage Example

To make the buzzer sound, simply power it:

 ```

from machine import Pin
import utime

buzzer = Pin(7, Pin.OUT)

while True:
    buzzer.value(1)  # Turn buzzer ON
    utime.sleep(1)
    buzzer.value(0)  # Turn buzzer OFF
    utime.sleep(1)
  
```

This simple setup makes it ideal for notification tones or alarm indicators—no extra circuitry or signal generation required!

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/b/u/buzzer-showcase.jpg)