Keypad Button Pad 4x3 Matrix

This keypad with 12 keys in a 4x3 matrix is suitable, for example, for a combination lock with Arduino. It can also be used on a Raspberry Pi or other controllers.

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Features:

• 12 keys with the characters 0 to 9, * and #
• Read via 7 lines: 4 rows and 3 columns
• Connection via solder holes: solder on a pin header or wires
• 4 mounting holes in the frame
• Library: Keypad

Application Examples:

• Combination lock with Arduino
• Entering numbers and codes in microcontroller projects

Documentation:

• Matrix keypad how-to (Arduino Playground)

Technical Data:

• Number of keys: 12
• Matrix: 4x3
• Connections: 9 solder holes, the inner 7 are used (pin 1 to 7)
• Pinout: pin 1 Col 2, pin 2 Row 1, pin 3 Col 1, pin 4 Row 4, pin 5 Col 3, pin 6 Row 3, pin 7 Row 2
• Max. voltage: 24 V
• Max. current: 20 mA
• Marking on board: KEY-34
• Colour: black
• Material: plastic
• Cut-out dimensions: 46 × 57 mm
• Dimensions: 51 × 70 × 10 mm
• Weight: 18 g

Scope of Delivery:

• 1× Keypad Button Pad 4x3 Matrix