4×4 Matrix Membrane Keypad – Slim 16-Button Human Interface at RoboShop BD

Efficient Matrix Scanning

Instead of using 16 individual GPIO pins for 16 buttons, this keypad uses a multiplexed matrix system. By scanning the 4 rows and 4 columns, your microcontroller (like an Arduino or ESP32) can accurately detect which key is being pressed. At RoboShop BD, we recommend this keypad for space-constrained projects where you need a full alphanumeric or numeric interface without the bulk of mechanical switches.

Durable and Weather-Resistant

Built from a high-quality PET membrane with conductive ink circuits, this keypad is designed to handle over 1 million presses. The flat, sealed surface is naturally resistant to dust and light moisture, making it more durable in “dirty” environments than open tactile buttons. It features a flexible ribbon cable terminated with a standard 2.54mm (0.1″) female header, allowing for a direct connection to breadboards or male jumper wires.

Key Features

• 16-Key Layout: Full numeric set (0–9) plus functional keys (A, B, C, D, *, #).

• Ultra-Thin Design: Less than 1mm thick, perfect for sleek, low-profile enclosures.

• Self-Adhesive Backing: Easily attaches to plastic, metal, or glass surfaces.

• Low Power Consumption: Passive device that only draws current during a keypress.

• Universal Compatibility: Works seamlessly with the standard Arduino Keypad.h library.

• Standard 8-Pin Interface: Features a 2.54mm pitch connector for easy prototyping.

Technical Specifications