Embedded Files
Passive Buzzer Alarm Module
Passive Buzzer Alarm Module
Introduction
Introduction
We can use Aduino to make many interactive works of which the most commonly used is acoustic-optic display. All the previous experiment has something to do with LED. However, the circuit in this experiment can produce sound. Normally, the experiment is done with a buzzer or a speaker while buzzer is simpler and easier to use. The buzzer we introduced here is a passive buzzer. It cannot be actuated by itself, but by external pulse frequencies. Different frequencies produce different sounds. We can use Aduino to code the melody of a song, which is actually quite fun and simple.
See product video: https://youtu.be/yIrpU9H4bNI
Specification
Specification
- Working voltage: 3.3-5v
- Interface type: digital
Sample Code
Sample Code
int buzzer=8;//set digital IO pin of the buzzer
void setup()
{
pinMode(buzzer,OUTPUT);// set digital IO pin pattern, OUTPUT to be output
}
void loop()
{ unsigned char i,j;//define variable
while(1)
{ for(i=0;i<80;i++)// output a frequency sound
{ digitalWrite(buzzer,HIGH);// sound
delay(1);//delay1ms
digitalWrite(buzzer,LOW);//not sound
delay(1);//ms delay
}
for(i=0;i<100;i++)// output a frequency sound
{
digitalWrite(buzzer,HIGH);// sound
digitalWrite(buzzer,LOW);//not sound
delay(2);//2ms delay
}
}
}
After downloading the program, buzzer experiment is finished.
Active Buzzer Alarm Module
Active Buzzer Alarm Module
Introduction
Introduction
Here is the simplest sound making module. You can use high/low level to drive it. Changing the frequency it buzzes can produce different sound. This module is widely used on your daily appliance, like PC, refrigerator, phones etc. And you can also create many interesting interactive project with this small but useful module.
See product video: https://youtu.be/D2bhEGfZYCQ
Just try it!! You will find the electronic sound it creates so fascinating.
Specification
Specification
- Working voltage: 3.3-5v
- Interface type: digital
Sample Code:
Sample Code:
int buzzPin = 3; //Connect Buzzer on Digital Pin3
void setup()
{
pinMode(buzzPin, OUTPUT);
}
void loop()
{
digitalWrite(buzzPin, HIGH);
delay(1);
digitalWrite(buzzPin, LOW);
delay(1);
}
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