3*4 Keypad

Functionality:

• Input Method: Provides user input through button presses.
• Matrix Design: Buttons are arranged in a matrix, allowing a single microcontroller to scan and identify pressed buttons efficiently.
• Output Signal: Usually sends digital signals corresponding to the pressed button(s) to the connected device.
• Connection Interface: Typically uses a 7-pin or 8-pin connector for easy connection to microcontrollers like Arduino or Raspberry Pi.

Key Features:

• Compact Size: Small and lightweight, making it suitable for portable devices and space-constrained projects.
• Easy to Use: Requires simple wiring and coding for integration into various projects.
• Low Cost: Affordable option for adding user input functionality.
• Versatility: Can be used for various applications like data entry, menu navigation, control functions, etc.

Applications:

• Embedded Systems: Used in microcontrollers-based projects for user input, control panels, etc.
• Calculators: Provide number and symbol input for calculations.
• Security Systems: Used for code entry and keypad-based authentication.
• Home Automation: Control lights, appliances, and other devices through button presses.
• DIY Projects: Integrate into various creative projects for interactive functionalities.