Membrane Keyboard 16 Keys / Keypad 4x4 Matrix

This thin keypad is suitable, for example, for a combination lock with Arduino and can also be used on a Raspberry Pi or other controllers. It is simply stuck on for mounting. To save pins, it can be connected via a PCF8574 I2C port expander with only two data pins.

Recommended Accessories:

• PCF8574 I2C Port Expander I/O Extension 8 Pin
• Dupont Cable M-M 20cm 20 Pieces

Features:

• 16 keys: 0 to 9, A to D, * and #
• Matrix with 4 rows and 4 columns
• Self-adhesive back
• Cable end with 8-pin socket
• Library: Keypad (Library Manager, search term Keypad)

Application Examples:

• Combination lock
• Entry of values and codes
• Control panel for your own devices

Documentation:

• 4x4 keypad with Arduino tutorial (Last Minute Engineers)
• Keypad library (GitHub)

Technical Data:

• Maximum voltage: 35 V
• Maximum current: 100 mA
• Connection: 8 pin
• Pitch: RM 2.54 mm
• Cable length: approx. 80 mm
• Mounting: self-adhesive
• Keypad size: 77 × 69 × 1 mm
• Weight: 7 g

Scope of Delivery:

• 1× Membrane keypad 16 keys / 4x4 matrix keypad