Lab3: 2 potentiometers, 1 controls blinking, 1 controls brightness for 3 LEDs
This code uses two potentiometers, one to control frequency of blinking, and one to control the brightness of the LEDs. Three LEDs are used, Red, Green and Blue.
/*
* one pot dims, the other pot changes the blinking rate
* modification of the following
* http://www.arduino.cc/en/Tutorial/AnalogInput
*/
int pot1Pin = 0; // select the input pin for the potentiometer 1
int pot2Pin = 1; // 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; // select the pin for the LED 1
int led2Pin = 11; // select the pin for the LED 2
int led3Pin = 10; // select the pin for the LED 3
void setup() {
pinMode(led1Pin, OUTPUT); // declare the led1Pin as an OUTPUT
pinMode(led2Pin, OUTPUT); // declare the led2Pin as an OUTPUT
}
void loop() {
pot1Val = analogRead(pot1Pin); // read the value from pot 1, between 0 - 1024, for dimming
pot2Val = analogRead(pot2Pin); // read the value from pot 2, between 0 - 1024, for blinking
analogWrite(led1Pin, pot1Val/4); // dim LED to value from pot1
analogWrite(led2Pin, pot1Val/4); // dim LED to value from
analogWrite(led3Pin, pot1Val/4); // dim LED to value from
delay(pot2Val); // stop the program for some time, meaning, LED is on for this time
analogWrite(led1Pin, 0); // dim LED to completely dark (zero)
analogWrite(led2Pin, 0); // dim LED to completely dark (zero)
analogWrite(led3Pin, 0); // dim LED to completely dark (zero)
delay(pot2Val); // stop the program for some time, meaning, LED is OFF for this time
}
