4×3 Matrix Membrane Type Keypad 12 Keys

4×3 Matrix Membrane Type Keypad 12 Keys

This membrane-type keypad is made of a flexible polyester material with printed conductive traces on the underside. Each key press completes an electrical circuit corresponding to a unique row and column combination, enabling efficient scanning using only 7 I/O pins.

The keypad includes numeric digits (0–9) along with ‘*’ and ‘#’ keys, ideal for designing calculators, password entry systems, menu navigation interfaces, and access control units.
Its self-adhesive backing makes installation simple and reliable on any flat surface. The tactile feel provides satisfying feedback while maintaining low actuation force and long operational life.

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Features

• 4×3 matrix layout with 12 soft-touch keys.
• Compact and lightweight — perfect for embedded designs.
• Adhesive backing for quick and secure mounting.
• Durable polyester film for long life and reliability.
• Tactile feedback with low actuation force (~100g).
• Compatible with Arduino, Raspberry Pi, and microcontrollers.
• Flexible flat ribbon cable (7-pin) for easy connection.
• Low contact resistance and high insulation for stable performance.

Applications

• Digital locks and access control systems
• Security panels and password entry units
• Arduino or Raspberry Pi user interfaces
• Home automation and industrial controls
• Calculators, vending machines, and data entry devices
• Menu navigation for embedded systems

Advantages

• Low-profile design ideal for compact enclosures.
• Easy interface with minimal wiring via matrix scanning.
• Long operational life with over a million key presses.
• Water and dust-resistant overlay ensures durability.
• Plug-and-play compatibility with standard header connectors.