Speaker 0.5W 8 Ohm Breadboard Compatible

Miniature 0.5W 8 Ohm speaker that is breadboard compatible.

DESCRIPTION

These are miniature 0.5W 8 Ohm speakers that are breadboard compatible.

PACKAGE INCLUDES:

• Speaker 0.5W 8 Ohm Breadboard Compatible

KEY FEATURES OF SPEAKER 0.5W 8 OHM BREADBOARD COMPATIBLE:

• CUI model: CVS-1708
• Approximately 200Hz to 20kHz frequency response
• 17mm Outside diameter
• Mylar cone with neodymium magnet
• 0.5W power handling w/ 8 Ohm impedance
• Breadboard and perf board compatible

This is a miniature speaker that is useful for creating sound in a project when you want better sound than a standard buzzer will provide.  These are actual tiny speakers with neodymium magnets and Mylar speaker cones.  They have an impedance of 8 ohm and can handle up to 0.5W.

Speaker Connections

There are 2-pins on the bottom of the speaker with 0.3″ spacing and are breadboard friendly.

For use with an MCU, the ‘-‘ pin is connected to the system ground and the ‘+’  (Signal) pin is connected to a digital output pin from the MCU.

A series capacitor of around 10uF – 47uF should be used on the drive pin to prevent DC current flow and avoid possible damage to the MCU output.

If a louder sound is desired, a transistor, LM386 audio amp or other amplifying device can be placed in-circuit to provide a stronger drive to the speaker.

OUR EVALUATION RESULTS:

These speakers work very well for adding sound to a project.  They are not hi-fi quality but work fine for basic sound reproduction.

There are several code examples built into the Arduino IDE for playing basic notes on a speaker.  One ‘toneMeloday’ is shown below.  Remember to connect a series cap between the output pin and the buzzer to avoid possible damage to the Arduino or use an amplifier of some type.

Speaker Example Program

/*
  Melody
  Plays a melody

  circuit:
  - 8 ohm speaker on digital pin 8

  created 21 Jan 2010
  modified 30 Aug 2011
  by Tom Igoe

  This example code is in the public domain.
  http://www.arduino.cc/en/Tutorial/Tone
*/

#include "pitches.h"

// notes in the melody:
int melody[] = {
  NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  4, 8, 8, 4, 4, 4, 4, 4
};
void setup() {
  // iterate over the notes of the melody:
  for (int thisNote = 0; thisNote < 8; thisNote++) {

    // to calculate the note duration, take one second divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000 / noteDurations[thisNote];
    tone(8, melody[thisNote], noteDuration);

    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    // stop the tone playing:
    noTone(8);
  }
}
void loop() {
  // no need to repeat the melody.
}

Notes: 

1. The speaker may come with an orange protective film.  This should be removed or the sound will be dampened

TECHNICAL SPECIFICATIONS