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variable_speed_blinker.ino
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variable_speed_blinker.ino
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// These constants won't change. They're used to give names
// to the pins used:
const int analogInPin = A0; // Analog input pin that the potentiometer is attached to
const int analogOutPin = 13; // Analog output pin that the LED is attached to
int led_red = 9;
int sensorValue = 0; // value read from the pot
int outputValue = 0; // value output to the PWM (analog out)
int delayValue = 7;
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
pinMode(led_red, OUTPUT);
}
int getDelay(){
delayValue = analogRead(analogInPin)/7;
if (delayValue < 7) {
return 7;
}
return delayValue;
}
void loop() {
// read the analog in value:
sensorValue = analogRead(analogInPin);
// map it to the range of the analog out:
outputValue = map(sensorValue, 0, 1023, 0, 255);
// change the analog out value:
analogWrite(analogOutPin, outputValue);
// print the results to the serial monitor:
Serial.print("sensor = " );
Serial.print(sensorValue);
Serial.print("\t output = ");
Serial.println(outputValue);
Serial.print("delay value = ");
Serial.print(getDelay());
digitalWrite(led_red, HIGH);
delay(getDelay());
digitalWrite(led_red, LOW);
delay(getDelay());
// wait 2 milliseconds before the next loop
// for the analog-to-digital converter to settle
// after the last reading:
delay(2);
}