Little Bird
4x4 keyboard keypad module
A 4×4 matrix membrane keypad with 16 tactile buttons, ideal for adding user input to microcontroller projects. The keypad uses a standard 8-pin matrix wiring...
A 4×4 matrix membrane keypad with 16 tactile buttons, ideal for adding user input to microcontroller projects. The keypad uses a standard 8-pin matrix wiring scheme (4 rows × 4 columns), requiring only 8 GPIO pins to read all 16 keys.
The flexible membrane design is thin and lightweight, making it easy to mount on enclosures or panels. Compatible with Arduino, Raspberry Pi, and other microcontrollers using common keypad scanning libraries.
Key Features
- 16 Keys – 4×4 matrix layout (0–9, A–D, *, #)
- 8-Pin Interface – Standard row/column matrix wiring for simple scanning
- Membrane Construction – Thin, flexible, and easy to mount
- Wide Compatibility – Works with Arduino, Raspberry Pi, ESP32, and other microcontrollers
Ideal For
- PIN code entry and security systems
- Menu navigation interfaces
- Calculator and data entry projects
- Control panels and DIY electronics
Package Contents
- 1× 4×4 Matrix Keypad Module
Jargon buster
Plain-language definitions for the technical terms used above.
- ESP32
- ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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