3X4 Matrix Keypad / Numeric Keypad Moudle for MCU / eLoad / Centralize Pisonet Counter / Vendo Machines

This component used for inputting numeric data into microcontroller-based projects or systems. It typically consists of 12 push-button switches arranged in a grid of 3 rows and 4 columns, hence the term "3x4 matrix."

Each push-button switch represents a unique combination of row and column intersection, allowing for 12 different inputs (0-9 digits, plus additional characters like '*' and '#'). The keypad module is connected to a microcontroller via its input/output pins.

When a button is pressed, the corresponding row and column are connected, and the microcontroller can detect this connection. By scanning the rows and columns in sequence, the microcontroller can determine which button was pressed and take appropriate action based on the detected input.

These keypad modules are commonly used in various applications such as security systems, access control systems, electronic locks, calculators, and any other projects that require numerical input from users. They provide a convenient and compact interface for users to interact with electronic devices.