A versatile 16-key matrix keypad, commonly used for user input in embedded
systems. Ideal for applications like security systems, digital control panels,
and robotics, offering efficient and reliable key selection.
Description:
A 4x4 keypad is a 16-button
matrix keypad used for user input in embedded systems, microcontroller
projects, and electronic circuits. It consists of four rows and four columns,
forming a grid where each button is mapped to a unique combination of row and
column signals. It is widely used in security systems, password-protected
devices, and interactive applications.
Specifications:
Number of Keys: 16 (4 rows × 4 columns)
Operating Voltage: 3.3V - 5V
Key Material: Plastic or membrane-based
keys
Interface: Matrix configuration (requires
row and column scanning)
Connection Type: 8-pin interface for
microcontroller integration
Keypad Dimensions: Typically around 7cm ×
7cm
Lifespan: Over 1 million keystrokes per
key
Features:
Compact & Lightweight: Suitable for
handheld and embedded applications
Easy Microcontroller Integration: Works
with Arduino, PIC, AVR, STM32, and Raspberry Pi
Durable & Reliable: Long-lasting key
switches with fast response
Customizable Key Labels: Can be programmed
for various functions like numbers, letters, or commands
Low Power Consumption: Efficient operation
in battery-powered systems
Applications:
Security Systems: Used in password-based
door locks and authentication systems
Automation & Control Panels: Input
interface for home automation and industrial machines
Embedded Systems: User input device for
menu navigation in microcontroller projects
Communication Devices: Keypad input for
telephony and DTMF-based applications
Robotics & IoT Projects: Used for
manual control of robotic movements and IoT devices