CIRC-08: Potentiometers

Purpose: 
Adjust the brightness of an LED with the potentiometer threshold.

Equipment:
•1 x Arduino Uno
•1 x Breadboard
•6 x Wire
•1 x Potentiometer 10k  Ohm
•1 x 560 Ohm Resistor
•1 x LED


Reference:
http://www.oomlout.com/a/products/ardx/circ-08

Program Details: 
No new concepts in the code for this lab.

Time to Complete: 
15 minutes

Results:
No problems with this lab, the brightness of the LED increases when the potentiometer is turned clockwise.


Photos of Project: 

Tips:
Make sure the potentiometer is in the right way. If nothing is happening, flip it 180 degrees.


Further Work:
Make the LED to turn off after a certain degree on the potentiometer.

Program Modifications:
The program is exactly the one from http://www.oomlout.com/a/products/ardx/circ-08

Program:

int sensorPin = 0;    // the pin the sensor is connected to
int ledPin = 13;      // the pin the LED is connected to
int sensorValue = 0;  // a variable to hold the state of the sensor

void setup()

{
  pinMode(ledPin, OUTPUT);  //initialize pin 13 as an output
}

void loop()

 {

  //reads the value from the sensor and sets it to sensorValue
  sensorValue = analogRead(sensorPin);    
  digitalWrite(ledPin, HIGH);  //sets the state of ledPin to high(on)
  delay(sensorValue);          //delay equal to the value of sensorValue
  digitalWrite(ledPin, LOW);  //sets the state of ledPin to low(off)
  delay(sensorValue);         //delay equal to the value of sensorValue    
 }