The 3x4 Matrix Keypad is a versatile input device widely used in embedded systems and DIY electronics. Featuring 12 keys arranged in a matrix format (3 columns and 4 rows), it allows easy numerical input for security panels, access control systems, calculators, and menu navigation. Compatible with popular microcontrollers like Arduino, Raspberry Pi, and PIC, this keypad simplifies your project’s interface without taking up many GPIO pins. Lightweight and compact, it’s a popular choice among hobbyists and professionals in Bangladesh seeking reliable and affordable user input solutions.