Still Open

AIR Project

This workshop is part of the workshop series "Still Open" organized by the Australian Network for Art and Technology (ANAT).

int val=0;	// variable to hold potentiometer value
int potPin1 = 1;	// Select the input pin for potentiometer (analog pin)
// digital pins:
int ledPin4 = 4;	// Select the pin for data LED (green)
int ledPin5 = 5;	// Select the pin for data LED (yellow)
int ledPin6 = 6;	// Select the pin for data LED (red)
///////FUNCTION//////////
void writeLEDs() {
if (val > 10) {
digitalWrite(ledPin4, LOW);	// Light up green LED on digital pin 4
}
else {
digitalWrite(ledPin4, HIGH);
}
if (val > 20) {
digitalWrite(ledPin5, LOW);	// Light up yellow LED on digital pin 5
}
else {
digitalWrite(ledPin5, HIGH);
}
if (val > 30) {
digitalWrite(ledPin6, LOW);	// Light up red LED on digital pin 6
}
else {
digitalWrite(ledPin6, HIGH);
}
}
//////////////////////////////
void setup() {
beginSerial(4800);	// general serial baudrate, in this case used internally by arduino to send data to the PC (pin 1)
pinMode(ledPin4, OUTPUT);	// Declare the ledPin as an OUTPUT
pinMode(ledPin5, OUTPUT);	// Declare the ledPin as an OUTPUT
pinMode(ledPin6, OUTPUT);	// Declare the ledPin as an OUTPUT
}
void loop() {
val = analogRead(potPin1);	// read potentiometer value into variable
writeLEDs();	// Call writeLEDs function
delay (5);	// delay for 5 milliseconds
}

the 3 LEDS are used to indicate the value of the potentiometer:
0-10: no LED lights up
10-19: green LED lights up
20-29: green + yellow LEDs light up
30-max: green, yellow and red LEDs light up
in this set up, we are simulating the sensor values with the potentiometer. later the LEDs will indicate the pollution levels.