4×4 Matrix Membrane Keypad

Description

Punch in your secret key (or Jenny’s number) into this numeric matrix keypad featuring 16 buttons arranged in a 4×4 grid. The keys are connected in a matrix format, requiring only 8 microcontroller pins (4 columns and 4 rows) for scanning.

This keypad includes headers for easy breadboard hookup, requiring light soldering to attach. Alternatively, you can use plain wires. It’s a sturdier version of our Membrane 3×4 Matrix Keypad. The left side has four row pins, and the right side has four column pins.

Features include:

• 16 buttons arranged in 4 rows and 4 columns
• Requires only 8 microcontroller pins (4 rows + 4 columns)
• Includes header pins for breadboard compatibility (requires soldering)
• Force required per key: 160-180g
• Contact resistance: <100Ω
• Compact dimensions: 69.0mm x 65.5mm x 9.7mm (2.7″ x 2.6″ x 0.4″)
• Weight: 21.2g (0.7oz)

For detailed wiring diagrams, libraries, and example sketches, see our Matrix Keypad Guide.

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