3. Pots and Blinking/Cycling LEDs
The two potentiometers used control the blink-rate of the LEDs and which LED is lit up.
Video: http://www.youtube.com/watch?v=os9jFhn9iQo
/*
* Erich Hacker
* one pot cycles, the other pot changes the blinking rate
* modification of the following
* http://www.arduino.cc/en/Tutorial/AnalogInput
*/
int pot1Pin = 5; // select the input pin for the potentiometer 1
int pot2Pin = 4; // select the input pin for the potentiometer 2
int pot1Val = 0; // variable to store the value coming from pot 1
int pot2Val = 0; // variable to store the value coming from pot 2
int led1Pin = 9; // pin for the LED 1
int led2Pin = 10; // pin for the LED 2
int led3Pin = 11; // pin for the LED 3
int led = 1; // pin for cycled LED
void setup() {
pinMode(led1Pin, OUTPUT); // declare the led1Pin as an OUTPUT
pinMode(led2Pin, OUTPUT); // declare the led2Pin as an OUTPUT
pinMode(led3Pin, OUTPUT); // declare the led3Pin as an OUTPUT
}
void loop() {
pot1Val = analogRead(pot1Pin); // read pot 1, between 0 - 1024, for cycling
pot2Val = analogRead(pot2Pin); // read pot 2, between 0 - 1024, for blinking
if (pot1Val < 340){
led=led1Pin;
} else if (pot1Val < 680){
led=led2Pin;
} else {
led=led3Pin;
}
digitalWrite(led, HIGH); // dim LED to value from pot1
delay(pot2Val); // stop the program for some time, meaning, LED is on for this time
digitalWrite(led, LOW); // dim LED to completely dark (zero)
delay(pot2Val); // stop the program for some time, meaning, LED is OFF for this time
}
