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Keypad 4*3 Matrix

Keypad 4*3 Matrix

KSh 650.00

Only 2 left in stock

The 4×3 Matrix Keypad is a compact and reliable input device consisting of 12 tactile push buttons arranged in a row–column matrix configuration. It allows efficient user input using minimal microcontroller I/O pins and is widely used for numeric entry and command selection in embedded systems and control panels.

Key Features

  • 12 keys arranged in a 4-row × 3-column matrix

  • Membrane-style keypad with tactile button response

  • Matrix wiring reduces required GPIO pins

  • Flexible flat cable connector

  • Low power consumption

  • Lightweight and slim design

  • Durable printed contact structure

Technical Specifications

  • Number of keys: 12 (0–9, *, #)

  • Matrix configuration: 4 rows × 3 columns

  • Interface type: Digital matrix (row/column scanning)

  • Operating voltage: 3.3V – 5V

  • Contact resistance: low, suitable for logic-level signals

  • Operating temperature: –20°C to +60°C

  • Cable length: typically 7–10 cm

  • Mounting type: Adhesive backing (on most variants)

Electrical Characteristics

  • Requires pull-up or pull-down resistors (internal or external)

  • Compatible with polling or interrupt-based scanning

  • Suitable for direct GPIO connection to microcontrollers

Compatibility

  • Arduino (UNO, Mega, Nano)

  • ESP8266, ESP32

  • Raspberry Pi

  • STM32 and other microcontrollers

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