کی پد فلت 3X4ماتریسی:

کی پد فلت 3X4ماتریسی از نوع ماتریسی 4*3 و بصورت پشت چسب دار، ضد آب و دارای کابل فلت است. دارای 12 عدد کلید فشاری هستند و با 7 پایه از میکروکنترلر یا FPGA، وضعیت این کلیدها خوانده می شود.

3 x 4 MATRIX MEMBRANE KEYPAD:

Features:

Ease of use: With the 3 x 4 membrane keyboard, effortlessly and quickly enter data.
Versatile connectivity: With a 7-pin connection and a 9 cm cable, the keyboard offers flexibility for various connection needs.
Compact: Measuring at 7 cm x 0.1 cm x 7.7 cm and weighing 6.25 grams, the keyboard is ideal for projects where space is at a premium.

Most of the applications of embedded systems require keypads to take the user inputs, especially in case where an application requires more number of keys. With simple architecture and easy interfacing procedure, matrix keypads are replacing normal push-buttons by offering more inputs to the user with the lesser I/O pins. As a Human Machine Interface (HMI) keypad plays a major role in vital microprocessor and microcontroller based projects and Equipment. Therefore, this article gives you a brief idea on matrix keypad interfacing with 8051 microcontroller.

Additional information:
Weight:  28 g
Dimensions : 3,80 × 7,80 × 15,50 cm
Soldering: none

Electronics: none

Coding: none

Mechanics: none

Introduction to Matrix Keypad(keypad 3*4)
A Matrix keypad is the most commonly used input device in many of the application areas like digital circuits, telephone communications, calculators, ATMs, and so on. A matrix keypad consists of a set of push button or switches which are arranged in a matrix format of rows and columns. These keypads are available in configurations like 3×4 and 4×4 based on the application it is implemented for.

https://technobyte.org/keypad-matrix-8051-interfacing/