Black 3X4 Keyboard

The Black 3X4 Keyboard is a 12-key matrix keypad laid out like a phone dial, with the numbers 0 to 9 plus * and #. The keys are wired in a grid of 4 rows and 3 columns, so a microcontroller can read all 12 keys using just 7 pins. It is a popular input device for Arduino and ESP32 door locks, password systems, calculators and menu controls.

Black 3X4 Keyboard Specifications

• Keys: 12 (0–9, * and #)
• Layout: 3 columns × 4 rows matrix
• Connections: 7 lines (4 rows and 3 columns)
• Colour: black
• Interface: passive switch matrix, read by scanning rows and columns
• Software: works with the Arduino Keypad library

Black 3X4 Keyboard Applications

• Password door locks with a servo or solenoid
• Alarm and access control panels
• Phone, calculator and number entry projects
• Menu navigation for LCD and OLED displays

What's in the Box

• 1 × black 3x4 matrix keypad

Tip: Pin order differs between keypad models, so find the row and column pins with a multimeter in continuity mode before wiring. Then set the row and column pin numbers in your Keypad library sketch to match.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.