CODE | Piezo Sounder Alarm - Arduino Project 011
Arduino project - sounder and sensors : Include project 11 Piezo Sounder Alarm ,Project piezo sounder Melody player , Project 13 Piezo knock sensor and Project 14 Light sensor.
电子编程--声音和传感器项目，主要包含以下几个项目，项目11 压电声音报警器，项目12 压电扬声器音乐演奏，项目13压电振动传感器，项目14光敏传感器。
By connecting a piezo sounder to a digital output pin, you can create a wailing alarm sound. It’s the same principle that you used in Project 7 when creating a pulsating lamp via a sine wave, but this time you replace the LED with a piezo sounder or piezo disc.
项目 Project 11 – Piezo Sounder Alarm
/* Coding Ron Wang
Aug 7th 2023
Autaba support for coding hardware
*/
// Project 11 - Piezo Sounder Alarm
float sinVal;
int toneVal;
void setup() {
pinMode(8, OUTPUT);
}
void loop() {
for (int x=0; x<180; x++) {
// convert degrees to radians then obtain sin value
sinVal = (sin(x*(3.1412/180)));
// generate a frequency from the sin value
toneVal = 2000+(int(sinVal*1000));
tone(8, toneVal);
delay(2);
}
}
