Hello World with LCD Keypad Shield #Learn Arduino

Hello World with LCD (liquid crystal display) keypad shield. Another simple #arduino project. #microcontrollers #helloworld #electronics #lcd #c

Foto kiriman Hani (read:honey) (@hanifadinna) pada Agu 24, 2015 pada 1:25 PDT

I already found very useful code to display the character with the LCD.

	//I've got nice code from the instructable (http://www.instructables.com/id/Arduino-LCD/)
	//And I modified into my name
	//The code:
	#include <LiquidCrystal.h>
	LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
	int readkey;
	void setup() {
	lcd.begin(16, 2);
	lcd.print("Hello World!");
	}
	void loop() {
	lcd.setCursor(0, 1); //start from coloumn 0 and row 1
	lcd.print("My name is Hani");
	readkey=analogRead(0);
	if (readkey<50) {
	lcd.clear();
	lcd.print("Button Right");
	}
	else if(readkey<195) {
	lcd.clear();
	lcd.print("Button Up");
	}
	else if(readkey<380) {
	lcd.clear();
	lcd.print("Button Down");
	}
	else if(readkey<790) {
	lcd.clear();
	lcd.print("Button Left");
	}
	}

view raw lcd_keypadshield.ino hosted with ❤ by GitHub

Happy share :)

Playing The Melody

Play Twinkle-twinkle Little Star with #piezo #buzzer controlled by #arduino. Another simple example of Arduino project. On the way to learn Arduino. #microcontrollers #electronics #sound #c

Video kiriman Hani (read:honey) (@hanifadinna) pada Agu 21, 2015 pada 7:36 PDT

This weekend I added up some instrument called piezo buzzer. We can play the tone, and as the beginner I started with the example from here . The copied code is here

	int speakerPin = 9;
	int length = 15; // the number of notes
	char notes[] = "ccggaagffeeddc "; // a space represents a rest
	int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
	int tempo = 300;
	void playTone(int tone, int duration) {
	for (long i = 0; i < duration * 1000L; i += tone * 2) {
	digitalWrite(speakerPin, HIGH);
	delayMicroseconds(tone);
	digitalWrite(speakerPin, LOW);
	delayMicroseconds(tone);
	}
	}
	void playNote(char note, int duration) {
	char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
	int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
	// play the tone corresponding to the note name
	for (int i = 0; i < 8; i++) {
	if (names[i] == note) {
	playTone(tones[i], duration);
	}
	}
	}
	void setup() {
	pinMode(speakerPin, OUTPUT);
	}
	void loop() {
	for (int i = 0; i < length; i++) {
	if (notes[i] == ' ') {
	delay(beats[i] * tempo); // rest
	} else {
	playNote(notes[i], beats[i] * tempo);
	}
	// pause between notes
	delay(tempo / 2);
	}
	}

view raw melody.ino hosted with ❤ by GitHub

Controlling the LED Brightness #Learn Arduino

Finally I can go up from blink to another basic of Arduino. In this circuit we can control the brightness of LED with potentiometer.LED brightness is determined from the position knob on the potentiometer.

Some material we need:

• Arduino (I am using Arduino UNO)
• LED
• Potentiometer 10K ohm
• 330 Ohm resistor
• PC/laptop
• Breadboard
• 6 jumperwire
• Data cable from Arduino to PC 

 Here is the code that we can simply copying from Arduino IDE example:

	/*
	Analog Input
	Demonstrates analog input by reading an analog sensor on analog pin 0 and
	turning on and off a light emitting diode(LED) connected to digital pin 13.
	The amount of time the LED will be on and off depends on
	the value obtained by analogRead().
	The circuit:
	* Potentiometer attached to analog input 0
	* center pin of the potentiometer to the analog pin
	* one side pin (either one) to ground
	* the other side pin to +5V
	* LED anode (long leg) attached to digital output 13
	* LED cathode (short leg) attached to ground
	* Note: because most Arduinos have a built-in LED attached
	to pin 13 on the board, the LED is optional.
	Created by David Cuartielles
	modified 30 Aug 2011
	By Tom Igoe
	This example code is in the public domain.
	http://arduino.cc/en/Tutorial/AnalogInput
	*/
	int sensorPin = A0; // select the input pin for the potentiometer
	int ledPin = 13; // select the pin for the LED
	int sensorValue = 0; // variable to store the value coming from the sensor
	void setup() {
	// declare the ledPin as an OUTPUT:
	pinMode(ledPin, OUTPUT);
	}
	void loop() {
	// read the value from the sensor:
	sensorValue = analogRead(sensorPin);
	// turn the ledPin on
	digitalWrite(ledPin, HIGH);
	// stop the program for <sensorValue> milliseconds:
	delay(sensorValue);
	// turn the ledPin off:
	digitalWrite(ledPin, LOW);
	// stop the program for for <sensorValue> milliseconds:
	delay(sensorValue);
	}

view raw potentiometer.ino hosted with ❤ by GitHub

the new things we learn in here is "sensorPin =A0". It means that we select the input pin for the potentiometer. To read the value from the sensor we just type "sensorValue = analogRead(sensorPin);"  inside the loop.

Blink LED #Learn Arduino

Up from hello world, now we go little bit further to make the LED blinking.

Some material we need:

• Arduino (I am using Arduino UNO)
• LED
• 330 Ohm resistor
• PC/laptop
• Breadboard
• 3 jumperwire
• Data cable from Arduino to PC

This is the code, and it's available on the example of Arduino IDE Software with title "Blink"

	/*
	Blink
	Turns on an LED on for one second, then off for one second, repeatedly.
	This example code is in the public domain.
	*/
	void setup() {
	// initialize the digital pin as an output.
	// Pin 13 has an LED connected on most Arduino boards:
	pinMode(13, OUTPUT);
	}
	void loop() {
	digitalWrite(13, HIGH); // set the LED on
	delay(1000); // wait for a second
	digitalWrite(13, LOW); // set the LED off
	delay(1000); // wait for a second
	}

view raw blink.ino hosted with ❤ by GitHub

"high" means 5V supply and make the LED is ON and
"low" meand 0V supply and make the LED is OFF.

The LED will be ON and OFF repeatedly every 1 second  that's because we put the code on the loop.

Hello World Repeated #Learn Arduino

Modifying from the previous, here I would like to make the "hello world"  appear repeatedly.

---------------------------------------------------------------------------------------------------

//Learn Arduino-Hello world Repeatedly-Hanifadinna

void setup () {
  Serial.begin(9600); //open serial port with speed 9600 bit per second
}

void loop () {
 delay(10000);  // delay time 10 second
 Serial.println("Hello world");  //print out the hello world
}
---------------------------------------------------------------------------------------------------
 Verivy, uplod and we just simply type "ctrl+shift+M" to show the print of "hello world", and then we got this from serial monitor.

To make the hello world appear repeatedly is because we put :

 delay(10000);  // delay time 10 second
 Serial.println("Hello world");  //print out the hello world

inside the void loop, so the hello world will appear repeatedly every 10 second.