Grove - Speaker
Introduction
5.0V Digital
The Grove- Speaker is a module which consists of power amplification and voice
outputs. The loudness can be adjusted by the on-board potentiometer. With different
input frequencies, the loud-speaker generates different tones. Coding the music into
arduino, DIY your own music box!
Features
• Volume Adjustable
• Grove Interface
Tip
More details about Grove modules please refer to Grove System
Specifications
Item
Min
Typical
Max
Unit
Working Voltage
4.0
5.0
5.5
VDC
Voltage Gain
- - 46
db
Band Width
- - 20
KHz
Raspberry
Pi
LinkIt
ONE
Platforms Supported
Arduino Wio BeagleBone
Caution
The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only
provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library /
demo code for all possible MCU platforms. Hence, users have to write their own software library.
Usage
The speaker can emit a variety of sounds like a car horn, doorbell and ignition . The
different sounds are based on the frequency of the input signal.
You can supply different frequency signal to this module with Arduino. Arduino
generates these signal via PWM or even digital write and delay.Here we are going to
show you how to generate these signals using delay(), the speaker sound bass 1~7.
/*macro definition of Speaker pin*/
#define SPEAKER 3
int BassTab[]={1911,1702,1516,1431,1275,1136,1012};//bass 1~7
void setup()
{
pinInit();
}
void loop()
{
/*sound bass 1~7*/
for(int note_index=0;note_index<7;note_index++)
{
sound(note_index);
delay(500);
}
}
void pinInit()
{
pinMode(SPEAKER,OUTPUT);
digitalWrite(SPEAKER,LOW);
}
void sound(uint8_t note_index)
{
for(int i=0;i<100;i++)
{
digitalWrite(SPEAKER,HIGH);
delayMicroseconds(BassTab[note_index]);
digitalWrite(SPEAKER,LOW);
delayMicroseconds(BassTab[note_index]);
}
}
Note
Due to the influence of the capacitance, the module can only output the bass signal, and the
treble is unable to emit.
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