4x4 matrix keyboard with 16 buttons 4 extra

Information about this module is generated with the help of AI. The description may be incomplete, inaccurate, or subject to change.
The 4x4 Matrix Keyboard is a compact input module with 16 push buttons arranged in a 4x4 matrix. The module also has four extra red push buttons with separate signal connections and eight LEDs for indication.

The 16 main buttons are arranged in four rows and four columns. The matrix connection allows the 16 buttons to be scanned using eight connections to a microcontroller. This makes the module suitable for Arduino, microcontrollers and other electronic development projects.

The four extra red buttons have individual signal connections marked S1, S2, S3 and S4. The buttons have a common GND connection. With a 10K pullup resistor, each signal can be connected to a digital input. When a button is pressed, the corresponding signal is connected to GND and the input becomes low.

The module also has eight LEDs with 1K resistors. The LEDs can be used as visual indicators in an electronic project, for example to show status or signal activity.

The combination of matrix buttons, separate push buttons and LEDs makes the module useful for building simple control panels, menu systems, code locks, input devices and microcontroller experiments.

The module can be used with both 3.3 V and 5 V logic and is therefore suitable for common development boards.

Facts.
Keyboard type: 4x4 matrix
Number of matrix buttons: 16
Number of extra buttons: 4
Total number of buttons: 20
Extra buttons: Red push buttons
Extra button connections: S1, S2, S3 and S4
Common connection for extra buttons: GND
Pullup resistor for extra buttons: 10K
Signal when extra button is pressed: GND
Number of LEDs: 8
LED resistors: 1K
Number of rows: 4
Number of columns: 4
Matrix connections: 8
Operating voltage: 3.3 V or 5 V
Keyboard size: 5 x 6 cm
Connection: Row and column matrix
Compatibility: Arduino and microcontrollers
Application: Manual input
Application: Menu systems
Application: Code locks and password locks
Application: Control panels
Application: Status indication
Application: Electronic projects

Included.
1 pc module.

About the product.
Weight: approx 25 gram.
Contact us if you have questions at info@pchbutik.se
Article no: 3939
Remaining stock quantity can be found under the Product details tab.
In our range since: 2026-10-26

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