Microcontroller Inputs: 4x4 Matrix Keypad

Most of the time we use ______ to get input value in our projects.

The 4×4 matrix keypad is a device that can solve the problem of ______ GPIO pins.

The 4×4 matrix keypad has ______ keys.

The 4×4 matrix keypad is an ______ device.

The 4×4 matrix keypad is organized in a matrix of ______ and columns.

To detect a pressed key, the microcontroller grounds all ______ by providing 0 to the output latch.

After pressing the ______ key, it makes the contact of the row with the column.

If one of the column bits has a zero, this means that a ______ press has occurred.

The microcontroller will ground the row by providing a low to row ______ only.

The 7-segment display consists of seven ______ arranged in an ‘8’-shaped pattern.

Each segment ______ has one of its connection pins brought directly out of the rectangular plastic package.

The pins are labeled with the letters ‘a’ through ______.

A 7-segment display is made up of ______ independent LEDs housed in a single package.

In a common ______ display, the com pin is connected to VCC, and each segment (a-g) is individually grounded to illuminate it.

To display the number 4 on a 7-segment display, you must illuminate the appropriate ______ segments.

Each ______ segment of a 7-segment display requires its current-limiting resistor to prevent damage.

A LOW condition (switch to ______) is required to activate the LED segments on this common anode display.

Typically, a standard red 7-segment display requires approximately ______ mA to illuminate correctly.

A 7-Segment Display has ______ segments.

The ______ pin is required for a common anode display.

The ______ pin is required for a common cathode display.

The system requires a ______ display to display numbers 0-9.

The system uses an ______ as the core of the system.

The remaining LED pins are wired together to form a single common ______.

Each segment can be individually turned on or off by setting the corresponding pin to HIGH or ______.

By lighting up individual segments, you can create any numerical character and even some basic representations of ______.

The internal structure of both common cathode and common anode displays is nearly ______.

In a common cathode display, the com pin is connected to ______, and a positive voltage is applied to each segment (a-g) to illuminate it.

There are two types of seven-segment displays: common ______ (CC) and common anode (CA).