Lab 1 - LED Blink

Description

This lab was an introduction to the Arduino environment and to setup our laptop. We used  pre-existing code and the arduino to control the blinking frequency of an LED. The frequency was altered by changing the duration of high and low signal (in ms).  

I added two 220 ohm resistors in parallel from output PIN 13 to 2 LED's (Red, Blue) that would blink at the same rate. I changed the rate from 1 Hz to 2Hz by changing the high/low duration to 500ms. 

Components Used

1- Arduino Uno

1- Breadboard

1- 220 ohm Resistor

1- LED (Green)

2 - Jumper Wires

Code

/*

  Blink (example sketch)

  Turns on an LED on for one second, then off for one second, repeatedly.

  This example code is in the public domain.

 */

// Pin 13 has an LED connected on most Arduino boards.

// give it a name:

int led = 13;

// the setup routine runs once when you press reset:

void setup() {                

  // initialize the digital pin as an output.

  pinMode(led, OUTPUT);     

}

// the loop routine runs over and over again forever:

void loop() {

  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)

  delay(1000);               // stay on for a second - CHANGED THIS TIME (ms) to change Frequency (1Hz to 2 Hz (500ms) ...etc) 

  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW

  delay(1000);               // stay off for a second - CHANGED THIS TIME (ms) in accordance to new freq. to match delay time

}