4x3 Matrix Keypads are somehow very popular among makers. A small box-like device that with 12 buttons layed out in a 4 by 3 matrix. A number or a symbol appears on each button for easy data input.
A 4x3 matrix keypad is sending signal to a microcontroller when you press the button. Your microcontroller then deciphers which of the number or symbol you pressed. That way you’d be able to type information into a device with a keypad. The keyboard is small, uncomplicated and favored by many gadgets.
CODE Using the 4x3 matrix keypad is a piece of cake. If you want to type a number or a symbol, tap the key that corresponds to what you’d like. If you want to type 5, for example, press on the button with that number. If you’d like to input a symbol such as * then push the button containing that symbol. The keypad observes your entry and passes it to the microcontroller.
You can do a lot with a 4×3 matrix keypad. Typical applications include electronic locks and access control systems. You might type a code on a keypad to open a door or access a safe spot. The keypad also exists in calculators, remote controls and other devices that require numbers. It can even appear on gaming systems or control panels to have everything be facilitated.
Programming a 4x3 matrix keypad appears dificult, but some tips will help to make it easy. When coding, you will assign each button its unique code to match what it does. This code is what lets the microcontroller understand what to do when you press a buttom. It’s also a good idea to test the keypad frequently to ensure all buttons are functioning and registering your input correctly.
Another interesting for a matrix 4x3 keypad is that it makes the systems that use it more secure. Because a code is required to enter the keypad, the device can be used only by authorized people. It has some obvious uses in home security systems, for example, where you prompt the code to switch an alarm on or off. Businesses also have the option to maintain their own local blacklist using the keypad to restrict access to sensitive areas and ensure only authorized personnel may enter.
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