Assignment: Sensing: Potentiometers

Collaborators: jonyen

Description

Made a circuit that would allow potentiometers to control the LEDs. For my project, I programmed the board so that pot 1 controls the brightness, pot 2 controls the blinking rate, and pot 3 controls which LEDs are on/blinking.

Components

3 potentiometers

3 LEDs

Code

/* Lab 3 

Pot 1 controls brightness
Pot 2 controls blinking rate
Pot 3 controls which LED(s) are on/blinking

*/

// Analog pin settings
int aIn = 0;    // Potentiometers connected to analog pins 0, 1, and 2
int bIn = 1;    //   (Connect power to 5V and ground to analog ground)
int cIn = 2;  

// Digital pin settings
int aOut = 9;   // LEDs connected to digital pins 9, 10 and 11
int bOut = 10;  //   (Connect cathodes to digital ground)
int cOut = 11;  

// Values
int aVal = 0;   // Variables to store the input from the potentiometers
int bVal = 0;  
int cVal = 0;  

void setup()
{
  pinMode(aOut, OUTPUT);   // sets the digital pins as output
  pinMode(bOut, OUTPUT);   
  pinMode(cOut, OUTPUT); 
}

void loop()
{
 
  aVal = analogRead(aIn) / 4;  // read input pins, convert to 0-255 scale
  bVal = analogRead(bIn); 
  cVal = analogRead(cIn) / 4;  

  digitalWrite(aOut, LOW);
  digitalWrite(bOut, LOW);
  digitalWrite(cOut, LOW);
  
  delay(bVal);

  if (cVal < 51) {
    analogWrite(aOut, aVal);    // Send new values to LEDs
    analogWrite(bOut, aVal);
    analogWrite(cOut, aVal);
  } else if (cVal >= 51 && cVal < 102) {
    analogWrite(aOut, aVal);    // Send new values to LEDs
  } else if (cVal >= 102 && cVal < 153) {
    analogWrite(bOut, aVal);
  } else if (cVal >= 153 && cVal < 204) {
    analogWrite(cOut, aVal);
  } 

  delay(bVal);    
}