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Home > Tutorials > Auduino > Arduino UNO Demo > Basic Chaser
Home > COMM140 > Basic Chaser

Chaser with a potentiometer on A5

 

Start with the basics.

1) If you need to download and install the Adruino IDE Integrated Development Environment

2) Connect the Arduino to the computer

3) Run the Adruino IDE

4) Select the correct board type within the IDE for this example I am using a KnockOffDuino Uno compatiable board.

 

 

5) Identify and select the correct COM port

 

6) Create a new sketch and copy and paste the example code below

 

/*

  Chase LEDs attached on pins 7 - 13
  Vary the speed of the chaser based on an Analog Input
  Demonstrates analog input by reading the value of a potentiometer (pot) on analog pin A5
  The valie of the pot is obtained using analogRead().

  The circuit:
   Potentiometer attached to analog input A5
   center pin of the potentiometer to the analog pin A5
   one side pin (either one) to ground
   the other side pin to +5V
  This example code is in the public domain.

  Created by David Cuartielles
  modified 30 Aug 2011
  By Tom Igoe
  modified 8 May 2014
  by Scott Fitzgerald
  modified 10 August 2016
  by rupert.russell@acu.edu.au
*/
int delayMils = 0;     // holds the value of the potentiometer
int sensorPin = A5;    // select the input pin for the potentiometer

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pins 8 - 13 as an outputs.
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {

  delayMils = analogRead(sensorPin);  // read the value of the potentiometer

  digitalWrite(7, HIGH);    // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin);  // we want to read the value again because it may have changed
  delay(delayMils);

  digitalWrite(8, HIGH);    // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin); // if we only read the value of the pot once per cycle the program is slower to respond to changes
  delay(delayMils);

  digitalWrite(9, HIGH);    // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(10, HIGH);   // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(11, HIGH);   // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(12, HIGH);   // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  // Now turn off in sequence

  digitalWrite(7, LOW);     // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(8, LOW);     // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(9, LOW);     // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(10, LOW);    // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(11, LOW);    // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(12, LOW);    // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);

  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW
  delayMils = analogRead(sensorPin);
  delay(delayMils);
}

 

 

 

APA citation:
Russell, R. (2016, August 20, 11:41 am). Chaser with a potentiometer on A5.
     Retrieved March 31, 2017, from http://rupert.id.au/COMM140/chaser2/index.php


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