4×4 Membrane Keypad Matrix — 16-Key, 8-Pin Connector, Arduino Compatible

4×4 Membrane Keypad Matrix — 16-Key, 8-Pin Connector, Arduino Compatible

This 4×4 membrane keypad provides 16 keys in a flexible, ultra-thin form factor — the membrane version of the tactile PCB keypad. Unlike the rigid PCB keypad, the membrane keypad is flexible, lightweight, and can be adhered to curved or flat surfaces with the built-in adhesive backing. It uses the same 4-row × 4-column matrix scanning principle and is compatible with the Arduino Keypad.h library. The 8-pin ribbon cable connector makes wiring straightforward.

Specifications

• Keys: 16 (4 rows × 4 columns)
• Key Labels: 1–9, *, 0, #, A, B, C, D (standard layout)
• Interface: 8-pin ribbon cable connector
• Type: Membrane (flexible, thin)
• Adhesive Backing: Yes — peel and stick to any flat surface
• Supply Voltage: 3.3V and 5V compatible (passive matrix)

Membrane vs Tactile PCB Keypad — Which to Choose?

• Membrane (this listing): Flexible, thin, adhesive backing, water-resistant surface — for panel mounting and finished products
• Tactile PCB keypad: Rigid, audible click, breadboard-friendly header — for prototyping and development

Arduino Wiring (Keypad.h Library)

• Connect 8-pin ribbon cable to Arduino digital pins (e.g., D2–D9)
• Install Keypad.h library from Arduino Library Manager
• Define key map, row pins, and column pins in sketch

Typical Applications

• Password / PIN entry: Security systems, door locks, and access control
• Panel-mount keypad: Adhered to enclosure panel for finished product appearance
• Numeric input: Calculator, data entry, and parameter setting
• Menu navigation: 16-key navigation for LCD menu systems

Package Contents

• 1 × 4×4 membrane keypad with 8-pin ribbon cable connector

Flexible, thin, adhesive-backed 16-key membrane keypad — Arduino Keypad.h compatible for password entry, panel mounting, and numeric input projects.

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