Speaker 36mm 0.5W 8 Ohm with Breadboard Jumpers

Description

This is a 36mm diameter 0.5W 8 Ohm speaker with attached solderless breadboard jumper wires.

PACKAGE INCLUDES:

• Speaker 36mm 0.5W 8 Ohm with Breadboard Jumpers

KEY FEATURES OF SPEAKER 36MM 0.5W 8 OHM WITH BREADBOARD JUMPERS:

• Approximately 80Hz to 12kHz frequency response
• 36mm Outside diameter w/ plastic cone
• Very thin depth of 5mm
• 0.5W power handling w/ 8 Ohm impedance
• Male solderless breadboard jumpers attached

These small speakers work well for adding a little sound to your next project.

Speaker Connections

These have 3″ long breadboard jumper wires added to them to make them breadboard friendly.

For use with an MCU, the black ‘-‘ black wire is connected to the system ground and the ‘+’  red wire is connected to a digital output pin from the MCU or a small audio amplifier.  A series capacitor of around 10uF – 47uF should be used in series with the drive pin to prevent DC current flow and avoid possible damage to the MCU output if driving directly off the MCU.

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. None

Technical Specifications