I have currently a working tilt-sensor, piezo circuit, in which that when the tilt sensor is tilted, the piezo alarms, creating a constant noise.
However, the buzzer only alarms when the tilt sensor surpasses angles greater than 90 degrees, which for my particular project, is too large; how can I vary the angle limit, more specifically, i'd like to change the angle to anything greater than 25 degrees.
Here is the code
int inPin = 2; // the number of the input pin
int reading; // the current reading from the input pin
int GreenLedPin = 13; // the number of the Green LED output pin
int RedLedPin = 12; // the number of the Red LED output pin
const int SpeakerPin = 11; // the number of the Speaker/Buzzer pin
void setup(){
pinMode (inPin, INPUT);
pinMode (GreenLedPin, OUTPUT);
pinMode (RedLedPin, OUTPUT);
Serial.begin(9600);
}
void loop () {
reading = digitalRead(inPin);
if (reading == 1) {
digitalWrite(RedLedPin, HIGH); // if tilted, turn the red LED ON
digitalWrite(GreenLedPin, LOW);
tone(SpeakerPin, 494, 500); // if tilted, turn the Speaker ON
delay(500);
} else {
digitalWrite(RedLedPin, LOW);
digitalWrite(GreenLedPin, HIGH); // if not tilted, turn the green LED ON
}
Serial.println(reading); // not really needed
delay(200); // pause 200 milliseconds between readings
}
note: i also have an LED system, however that isn't important for this question
Thanks!
