I am trying to code an alarm clock/hourglass. I have essentially everything, all 6 LEDS lighting up in the allotted time, the buzzer buzzing for how long I want it to, but I can only either get it to buzz once or never ending. I have tried while, for loops, moving around the switchstate code into the while loop. I've exhausted all my resources. Could anyone help?
const int switchPin = 8;
'
unsigned long previousTime = 0; // store the last time an LED was updated
int switchState = 0; // the current switch state
int prevSwitchState = 0; // the previous switch state
int led = 2; // a variable to refer to the LEDs
'
// 600000 = 10 minutes in milliseconds
long interval = 10000; // interval at which to light the next LED
'
void setup() {
// set the LED pins as outputs
for (int x = 2; x < 8; x++) {
pinMode(x, OUTPUT);
}
// set the tilt switch pin as input
pinMode(switchPin, INPUT);
}
'
void loop() {
// store the time since the Arduino started running in a variable
unsigned long currentTime = millis();
'
// compare the current time to the previous time an LED turned on
// if it is greater than your interval, run the if statement
if (currentTime - previousTime > interval) {
// save the current time as the last time you changed an LED
previousTime = currentTime;
// Turn the LED on
digitalWrite(led, HIGH);
// increment the led variable
// in 10 minutes the next LED will light up
led++;
'
if (led == 8) {
tone(12,75,3000)
(1000)
noTone(12)
delay(1000)
// the hour is up
}
}
'
// read the switch value
switchState = digitalRead(switchPin);
'
// if the switch has changed
if (switchState != prevSwitchState) {
// turn all the LEDs low
for (int x = 2; x < 8; x++) {
digitalWrite(x, LOW);
}
'
// reset the LED variable to the first one
led = 2;
'
//reset the timer
previousTime = currentTime;
}
// set the previous switch state to the current state
prevSwitchState = switchState;
}