LCD Keypad Shield for Arduino

 

http://www.hobbytronics.co.uk/arduino-lcd-keypad-shield

LCD Keypad Shield for Arduino
Click to enlarge
Price: 10.99 
(9.16 + VAT)
Stock Quantity: 9
Model: LCDSHIELD
Average Rating: 5 out of 5 Stars!


 

 

Arduino LCD Keypad Shield

This is a 16x2 LCD and Keypad shield for Arduino Uno, Diecimila, Duemilanove, Freeduino boards, and other Uno sized compatible boards such as the Sparkfun Redboard.

bulletBlue Backlight with white words
bulletuses 4 Bit Arduino LCD Library
bulletLeft, Right, Up, Down and Select buttons
bulletScreen contrast adjustment
bulletArduino Reset button

The board uses different pins to the Arduino example sketches, so to make the display work, use the following sequence of pins when starting the library:

LiquidCrystal lcd(8,9,4,5,6,7); 
 

The buttons are connected to only one analog input pin through resistors to give a different voltage for each button, thus saving on input/output pins. Reading the buttons is easy and example code is shown below

Pin Connections

Pin Function
Analog 0 Buttons (select, up, right, down and left)
Digital 4 DB4
Digital 5 DB5
Digital 6 DB6
Digital 7 DB7
Digital 8 RS (Data or Signal Display Selection)
Digital 9 Enable
   

Note: Do not use pin Digital 10 when this board is plugged in (see here for more details)

The backlight is not dimmable by default. In order to make it dimmable using PWM see this instructable
www.instructables.com/id/Arduino-LCD-Backlight-Fix/

The board is a little bigger than an Arduino UNO (measuring 8cm x 6cm). This can be seen in the images.

Montage

Arduino UNO + carte qui depasse

 

 

 

L arduino lit les voltages pour chaque bouton  on en deduit le bouton dans une boucle condition

 

 

                              E100

A 640      B  410                    C   0   RESET

                                 F257

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

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.setCursor(0,0);
  lcd.print("LCD Key Shield");
  lcd.setCursor(0,1);
  lcd.print("Press Key:");
}

void loop() {
  int x;
  x = analogRead (0);
  lcd.setCursor(10,1);
  if (x < 60) {
    lcd.print ("Right ");
  }
  else if (x < 200) {
    lcd.print ("Up    ");
  }
  else if (x < 400){
    lcd.print ("Down  ");
  }
  else if (x < 600){
    lcd.print ("Left  ");
  }
  else if (x < 800){
    lcd.print ("Select");
  }
}
 
------------------
programme pur lire le voltage
// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.setCursor(0,0);
lcd.print(" ");
lcd.setCursor(0,1);
lcd.print("Press Key:");
}

void loop() {
int x;
x = analogRead (0);
lcd.setCursor(0,0);
lcd.print(" ");
lcd.setCursor(0,0);
lcd.print (x);
lcd.setCursor(10,1);
delay(500);
if (x < 60) {
lcd.print ("Right ");
}
else if (x < 200) {
lcd.print ("Up ");
}
else if (x < 400){
lcd.print ("Down ");
}
else if (x < 600){
lcd.print ("Left ");
}
else if (x < 800){
lcd.print ("Ext Left");
}
}