MB27F - 27mm Flat Loud Continuous Documentation

Component Name

MB27F - 27mm Flat Loud Continuous

Description

The MB27F is a 27mm flat loud continuous buzzer, designed for various applications requiring a compact and efficient audible alerting solution. This component is part of the Internet of Things (IoT) ecosystem, suitable for integration into devices, machines, and systems that require a reliable and loud acoustic signaling mechanism.

Functionality

The MB27F buzzer is designed to produce a loud, continuous sound when an electric current is applied to its terminals. The buzzer's primary function is to alert users or operators to a specific event, condition, or status, such as

Alarm notifications

Warning signals

Status indications

Machine faults or errors

Device startup or shutdown

Key Features

Compact Design: The MB27F measures 27mm in diameter, making it ideal for space-constrained applications where a compact footprint is essential.
High Sound Pressure Level (SPL): The buzzer produces a loud, continuous sound with a minimum SPL of 85 dB at 1 meter, ensuring it can be heard in noisy environments.
Low Current Consumption: The MB27F operates with a low current draw of 20mA (max), minimizing power consumption and heat generation, making it suitable for battery-powered devices.
Continuous Sound Generation: The buzzer produces a continuous sound wave, providing a consistent and reliable alerting mechanism.
Stable Frequency: The buzzer's frequency remains stable at 2.4 kHz (+/- 10%), ensuring a consistent tone and pitch.
Environmental Durability: The MB27F is designed to operate in a wide range of temperatures (-20C to 70C) and humidity levels (up to 80% RH), making it suitable for use in various environmental conditions.
Robust Construction: The buzzer features a sturdy, metal-based design with a durable connection terminal, ensuring reliable operation and minimizing the risk of mechanical failure.
Easy Integration: The MB27F can be easily integrated into devices and systems using its standard, two-wire connection (VCC and GND).

Diameter

27mm

Height

9.5mm

Weight

6g

Operating Voltage

3V to 24V DC

Operating Current

10mA to 20mA

Sound Pressure Level (SPL)

85 dB (min) at 1 meter

Frequency

2.4 kHz (+/- 10%)

Applications

The MB27F is suitable for various IoT applications, including

Industrial automation and control systems

Medical devices and equipment

Security systems and alarms

Consumer electronics and appliances

Automotive systems and accessories

Certifications and Compliance

The MB27F complies with relevant industry standards and regulations, including RoHS and CE.

Pin Configuration

MB27F - 27mm Flat Loud Continuous Speaker Component Documentation
Pinout Description:
The MB27F speaker component has a total of 4 pins, which are used to connect the speaker to a microcontroller or any other audio source. The pins are labeled as follows:
Pin 1: VCC (+) - Positive Power Supply
Function: Provides positive power supply to the speaker
Voltage Range: 3.3V to 5.5V
Recommended Operating Voltage: 3.3V or 5V
Connection: Connect to the positive power supply of the microcontroller or audio source
Pin 2: GND (-) - Negative Power Supply/ Ground
Function: Provides negative power supply and ground connection to the speaker
Voltage Range: 0V (Ground)
Recommended Operating Voltage: 0V (Ground)
Connection: Connect to the negative power supply or ground of the microcontroller or audio source
Pin 3: SIG (+) - Audio Signal Input
Function: Receives the audio signal from the microcontroller or audio source
Signal Type: Analog audio signal
Impedance: 4
Connection: Connect to the audio output pin of the microcontroller or audio source
Pin 4: NC (Not Connected) - No Internal Connection
Function: No internal connection, leave unconnected
Connection: Do not connect to any pin, leave unconnected
Connection Structure:
To connect the MB27F speaker component to a microcontroller or audio source, follow the below connection structure:
VCC (+) pin of the speaker connects to the positive power supply pin of the microcontroller or audio source
GND (-) pin of the speaker connects to the negative power supply or ground pin of the microcontroller or audio source
SIG (+) pin of the speaker connects to the audio output pin of the microcontroller or audio source
NC pin of the speaker is left unconnected
Important Note:
Make sure to use a suitable resistor or capacitor in series with the audio signal input (SIG pin) to match the impedance and prevent damage to the speaker or microcontroller.
The speaker's audio signal input (SIG pin) should not be connected to a digital output pin of the microcontroller. Use an analog audio output pin or a suitable audio amplifier circuit to drive the speaker.
The recommended operating voltage for the speaker is 3.3V or 5V. Operating the speaker outside the recommended voltage range may affect its performance or cause damage.

Code Examples

MB27F - 27mm Flat Loud Continuous Speaker Documentation

Overview

The MB27F is a 27mm flat loud continuous speaker designed for a wide range of IoT applications, including smart home devices, robots, and wearable technology. This component is suitable for projects requiring a compact, high-quality audio output.

Pinout

The MB27F has a standard 3-pin interface:

VCC (Positive Power Supply)
 GND (Ground)
 SIG (Signal Input)

Technical Specifications

Operating Voltage: 2.5V - 5V
 Power Rating: 1W
 Frequency Response: 200Hz - 20kHz
 Sensitivity: 85dB
 Impedance: 4

Code Examples

### Example 1: Basic Tone Generation with Arduino

In this example, we will use the MB27F speaker to generate a simple tone using an Arduino board.

```c
const int speakerPin = 9;  // Connect the SIG pin to digital pin 9

void setup() {
  pinMode(speakerPin, OUTPUT);
}

void loop() {
  tone(speakerPin, 1000);  // Generate a 1kHz tone
  delay(1000);
  noTone(speakerPin);  // Stop the tone
  delay(1000);
}
```

### Example 2: Music Playback with Raspberry Pi (Python)

In this example, we will use the MB27F speaker to play a short music clip using a Raspberry Pi and Python.

```python
import pygame

# Initialize the pygame library
pygame.init()

# Set up the speaker pin as an output
speaker_pin = 18  # Connect the SIG pin to GPIO 18
pygame.mixer.init()
pygame.mixer.set_num_channels(1)

# Load a short music clip
pygame.mixer.music.load('music_clip.wav')

# Play the music clip
pygame.mixer.music.play()

while pygame.mixer.music.get_busy():
    # Wait for the music clip to finish playing
    pass

# Clean up
pygame.mixer.quit()
pygame.quit()
```

### Example 3: Voice Assistant Integration with ESP32 (MicroPython)

In this example, we will use the MB27F speaker to play a text-to-speech response from a voice assistant using an ESP32 board and MicroPython.

```python
import speech
import machine

# Initialize the speaker pin as an output
speaker_pin = machine.Pin(25, machine.Pin.OUT)

# Set up the speech synthesizer
speech.init()

# Define a function to play a text-to-speech response
def play_response(text):
    speech.say(text)
    speech.play(speaker_pin)

# Play a sample response
play_response("Hello, world!")

# Clean up
speech.deinit()
```

These examples demonstrate the basic usage of the MB27F speaker in various IoT contexts. Remember to adjust the pin connections and code according to your specific project requirements.