Every electronic application has a unique keyboard that serves a specific purpose. Matrix keyboards are one of them. But what is a matrix keyboard? Let’s overview some fundamental aspects associated with a matrix keyboard.

Knowing the Fundamentals – What is a Matrix Keyboard?

A matrix keyboard or a keyboard matrix circuit is a keyboard featuring a grid-like array of wires connecting the key switches. So, for instance, if the keyboard has eight rows and eight columns of wire, it can support 64 keys. These wires have switches at the intersection. In addition, the circuits have a scanner continuously scanning the grid, thus allowing it to identify the key the user has pressed. 

For example, if the user presses I on a keyboard matrix circuit, the scanner will notice the activation of the switch at the intersection of the wires where the key I is located. It is quick and accurate and works for various keyboards. 

Pros and Cons of Matrix Keyboards

One of the most basic benefits of keyboard matrix circuits is the requirement for fewer wires. Every key has one wire each. So, for 64 keys, you will have 64 wires. 

But on the other hand, matrix keyboards have a few drawbacks as well. One of the drawbacks is the use of binary on and off signals. In comparison with other keyboards using two sets of switches for every key, matrix keyboards feature a lower level of performance. Besides, keyboard matrix circuits that musical instruments have usually do not have diodes at the wire intersections. It can result in a type of error, where the keyboard considers a key is pressed. But in reality, it isn’t. That can lead to errors.

Applications of Matrix Keyboards

Matrix keyboards have widespread uses across applications, including telephone communications, digital circuits, ATMs, calculators, etc.

Reading a Matrix Keyboard

To read a particular button in the matrix, you drive the corresponding column pin low and then read the corresponding row pin. If the row pin reads low then the button is pressed. But if it reads high, then the button is not pressed. 

The process usually is done in a quick sequential scanning operation to check every button in the matrix, driving every column pin low while reading each row pin lying in between. These keyboards do not prove problematic if the user does simultaneous key presses. The system can still read each key individually.

Choose Cutek Circuits for Premium Quality Matrix Keyboards

One of the leading manufacturers of matrix keyboards, Cutek Circuits is a keyboard partner you can rely upon. With a steadfast approach, use of the latest technology, qualified human resources, and a stringent quality check, we’ve accomplished several milestones to become a keyboard manufacturer to reckon with. 

Additionally, we design custom keyboards to suit the unique applications of our clients and help them derive optimal value from their investments. So, if you’ve been looking for efficient and effective matrix keyboard solutions, please email us at sales@cutekcircuits.com to connect with our experts.