Lab 3: Two potentiometers, blink + brightness
Previous setup from lab 2, + two potentiometers.
Both Pots control the blue, red, and green LED, one controls the rate of blinking, the other, the brightness.
Red led is at twice the speed as the blue led, green led, etc. giving an added strobe effect.
/*
* 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 = 5; // 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(led3Pin, pot1Val/8); // dim LED to value from pot1 blue light
analogWrite(led2Pin, pot1Val/4); // dim LED to value from pot1 blue light
analogWrite(led1Pin, pot1Val/2); // dim LED to value from pot1 red light
delay(pot2Val); // stop the program for some time, meaning, LED is on for this time
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
}
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