Keypad Functions and Digital I/O Quiz

Reads the status (HIGH or LOW) of a specified digital pin on an Arduino.

Possible states a digital pin can be in, representing 'on' and 'off' in Arduino programming.

A pin on an Arduino board connected to a digital circuit.

A resistor used to pull a digital input to a high state (logic 1).

A switch that completes a circuit when pressed.

A switch that breaks a circuit when pressed.

Sets a pin as either input or output.

Digital signals in which logic 1 is HIGH, and logic 0 is LOW.

Connecting a numeric keypad to an electronic device, often a microcontroller, allowing input.

A device used for entering numbers or text.

A set of pre-written instructions to control the keypad in a microcontroller.

The keypad library allows the microcontroller to continue its processing while waiting for input.

A technique used to connect more buttons to fewer lines on a microcontroller.

A command that pauses the program's execution for a specified time.

Keypad that is slow or difficult to use due to excessive delays in the code.

A small computer on a single chip used to control electronic devices.

Returns a key value when a key is pressed, but does not automatically repeat.

Allows tracking key release events, giving a more comprehensive keypad interaction.

A mapping between physical keys and character representation (e.g. a number or letter).

Defines the mapping of keypad buttons to characters.

Electronic pins connected to the rows of the keypad.

Electronic pins connected to columns of the keypad.

All switches are initially open, no connection between rows and columns.

A display device used in digital circuits for displaying messages. It typically comes as an LCD Module, which integrates the driver and controller.

A variable of type LiquidCrystal used to control and interact with an LCD display. The display can be controlled using 4 or 8 data lines.

A method of transmitting data one bit at a time over a single channel.

A function in Arduino programming that initializes the serial communication port at a specified baud rate.

A function that prints a string to the serial monitor, followed by a newline character.

A specific value in keypad.getKey() that indicates no key is pressed.

A function that reads the current key pressed on a keypad.

A library used with Arduino to control LCD displays. It provides functions to write text, characters, and control the LCD's cursor.

The specific pins on the Arduino that are connected to the RS, RW, Enable, and data pins on the LCD for communication.

Controls whether the LCD is in command mode or data mode. Command mode configures the LCD, while data mode sends characters.

Determines whether the LCD is reading or writing data. Usually tied to ground (GND) meaning only writing is used.

Triggers the LCD to process the data received from the Arduino.

Transmit data between the Arduino and the LCD, controlling the LCD’s display.

A common type of LCD display with 16 characters per row and 2 rows.

A separate LED source needed to illuminate the LCD's characters.

Initializes the LCD display with the specified number of columns and rows. This function sets up the LCD for communication and operation.

Clears the entire LCD screen and positions the cursor back to the top-left corner.

Positions the cursor at a specific location on the LCD screen. The coordinates (x, y) represent the column and row respectively.

Represent the number of columns and rows of the LCD display. They determine its size and how text is displayed.

A control pin that signals the LCD to read or process the data sent.

8 data pins used to transmit data (characters or commands) between the Arduino and the LCD display.