LED Voltage Analysis

Arduino code block for LED voltage analysis.¶

The .ino exercise can be downloaded here. The code will compile and execute in the Arduino Serial Monitor, but it is meant to be completed, following the LED Lab Instructions

// This is the declaration section.  Assign pin numbers to variables for use in code.

// This line assigns Analog Pin 0 to the variable aPin.
#define aPin0 0

// Do the same thing for Analog Pin 2.   We will use this to measure voltage at a different point


//  This is setup function.  It initializes the pins as well as the serial communication between
//  Arduino and the computer.
void setup() {

  // Tell the Serial monitor to use a baud rate of 9600.  This is the data transfer rate.
  Serial.begin(9600);

  // Use the pinMode function to tell Arduino to put Analog Pin 0 into INPUT mode so it can watch for
  // a signal.
  pinMode(aPin0, INPUT);

  // Do the same for Analog Pin 2.


}

// This is the loop structure that will operate continuously as long as the arduino is powered.
void loop() {

  //Read an integer from analogRead and record
  int Vin_digital = analogRead(aPin0);
  // Make the analog to digital conversion to report the value in Volts.
  float Vin = 5*float(Vin_digital)/1023;

  // Do the same for Analog Pin 2.

  // Print the following info to the Serial Monitor.
  Serial.print("The value of Vin is: ");
  Serial.println(Vin);

  // Do the same for Analog Pin 2.

  // Add a delay so it doesn't go too fast to read.
  delay(2000);  //This is a 2 second delay.  Delay works in milliseconds.

}