Keypad LCD Shield

The fastest way to add a man-machine interface to your projects, clearly showing text, and with push buttons for input and data management. The SHIELD has 6 buttons, of which 5 are for inputs and 1 is to reset the Arduino.

The 5 input buttons (Select, Up, Down, Left, Right) only make use of 1 pin of the Arduino (PIN: A0). To read the buttons we must read the analog value in pin A0, pressing a button creates a different voltage divider for each button and in this way we can identify which button has been pressed.

Specifications:

• Supply Voltage: 5VDC
• HD44780 compatible driver
• 2-line x 16-character alphanumeric LCD
• 5-dot x 8-dot characters
• Character Size: 4.74mm x 2.94mm
• White characters
• Operates in 4-bit mode to save development card pins
• Includes trimmer to adjust contrast and 6-button keyboard

Pins used on the Arduino development plate:

• 13: Buzzer
• 12: RS LCD pin
• 11: LCD Enable
• 9: Used to turn the LCD backlight on and off
• 5: Data to LCD (D4)
• 4: Data to LCD (D5)
• 3: Data to LCD (D3)
• 2: Data to LCD (D2)
• A0: Used as button input

NOTE: The Arduino pin 10 is disabled when using the blue 2x16 LCD Shield Display with Keypad.