Arduino – Page 2 – Imthiaz Blog

Liquid Crystal Display with Ardunio

April 9, 2012
Imthiaz
Electronics

The learning process with Arduino continues… Last week I had ordered bunch of goodies from Sparkfun, and today morning I received them. I tried to assemble few circuits, but I understood I need to get a decent soldering station to continue my experiments. But I was able to make Liquid Crystal Display (LCD) to work. But I had to hold it in a position for it to work.

/*
 http://www.arduino.cc/en/Tutorial/LiquidCrystal
 */

// include the library code:
#include <liquidcrystal .h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("imthi.com");
  delay(1000);
}

void loop() {
  // scroll 13 positions (string length) to the left 
  // to move it offscreen left:
  for (int positionCounter = 0; positionCounter < 13; positionCounter++) {
    // scroll one position left:
    lcd.scrollDisplayLeft(); 
    // wait a bit:
    delay(250);
  }

  // scroll 29 positions (string length + display length) to the right
  // to move it offscreen right:
  for (int positionCounter = 0; positionCounter < 29; positionCounter++) {
    // scroll one position right:
    lcd.scrollDisplayRight(); 
    // wait a bit:
    delay(250);
  }
  
    // scroll 16 positions (display length + string length) to the left
    // to move it back to center:
  for (int positionCounter = 0; positionCounter < 16; positionCounter++) {
    // scroll one position left:
    lcd.scrollDisplayLeft(); 
    // wait a bit:
    delay(250);
  }
  // delay at the end of the full loop:
  delay(1000);

}

http://www.arduino.cc/en/Tutorial/LiquidCrystal

// include the library code:

#include <liquidcrystal .h>

// initialize the library with the numbers of the interface pins

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {

// set up the LCD's number of columns and rows:

lcd.begin(16, 2);

// Print a message to the LCD.

lcd.print("imthi.com");

delay(1000);

}

void loop() {

// scroll 13 positions (string length) to the left

// to move it offscreen left:

for (int positionCounter = 0; positionCounter < 13; positionCounter++) {

// scroll one position left:

lcd.scrollDisplayLeft();

// wait a bit:

delay(250);

}

// scroll 29 positions (string length + display length) to the right

// to move it offscreen right:

for (int positionCounter = 0; positionCounter < 29; positionCounter++) {

// scroll one position right:

lcd.scrollDisplayRight();

// wait a bit:

delay(250);

}

// scroll 16 positions (display length + string length) to the left

// to move it back to center:

for (int positionCounter = 0; positionCounter < 16; positionCounter++) {

// scroll one position left:

lcd.scrollDisplayLeft();

// wait a bit:

delay(250);

}

// delay at the end of the full loop:

delay(1000);

}

Reference : SparkFun Inventor’s Kit for Arduino, LCD Add-On for SIK, How to use the LCD with the SparkFun Inventor’s Kit.

Temperature Sensor with Arduino & LED

April 3, 2012
Imthiaz
Electronics

This is a mini project using Arduino. This uses a temperature sensor and Arduino Uno.

int pin = 2;
int temperaturePin=0;

void setup() { 
  Serial.begin(9600);
  for(pin = 2; pin < = 9; pin += 1){
    pinMode(pin,OUTPUT);
  }
} 
  
void loop() {
  float temperature = getVoltage(temperaturePin);
  temperature = (temperature - .5) * 100;
  
  int toLit = map(temperature,20,80,2,9);
  lightsToLit(2,toLit);
  delay(250);
} 

void lightsToLit(int start,int end){
  for(pin = 2; pin <= 9; pin += 1){
    digitalWrite(pin,LOW);
  }
  for(pin = start; pin <= end; pin += 1){
    digitalWrite(pin,HIGH);
  }
}

float getVoltage(int pin){
 return (analogRead(pin) * .004882814);
}

int pin = 2;

int temperaturePin=0;

void setup() {

Serial.begin(9600);

for(pin = 2; pin < = 9; pin += 1){

pinMode(pin,OUTPUT);

}

void loop() {

float temperature = getVoltage(temperaturePin);

temperature = (temperature - .5) * 100;

int toLit = map(temperature,20,80,2,9);

lightsToLit(2,toLit);

delay(250);

}

void lightsToLit(int start,int end){

for(pin = 2; pin <= 9; pin += 1){

digitalWrite(pin,LOW);

}

for(pin = start; pin <= end; pin += 1){

digitalWrite(pin,HIGH);

}

float getVoltage(int pin){

return (analogRead(pin) * .004882814);

}

Reference: SparkFun Inventor’s Kit Sample Project – 02, SparkFun Inventor’s Kit Sample Project – 10