Grove – Speaker 揚聲器 喇叭模組 聲音放大器

商品說明

這個Speaker 揚聲器模組使用功率放大器來驅動喇叭發出聲音，音量通過板上的電位器進行調節。輸入不同的頻率，喇叭發出不同的音調。有了它，你的 Arduino 專案就可變身為音樂盒。

產品特性

• 音量可調
• 配有通用的Grove接口

技術參數

使用說明

模塊上的喇叭可發出不同聲音，如汽車鳴笛、門鈴聲。不同的聲音來自不同的輸入頻率。Arduino輸出PWM信號，或者利用digitalWrite、delay函數改變數字IO輸出，然後輸入到該Grove模塊，就能產生不同音調的聲音。下面介紹如何用delay函數輸出低音1~7個音階。

注意：由於電容的影響，模塊只能輸出低音，不能輸出高音音階。

Introduction

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 frequency, the loud-speaker generated different tones. Coding the music into arduino, DIY your own music box!

Feature

• Volume Adjustable
• Grove Interface

Specification

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.