SparkFun
Keypad - 12 Button
A basic 12-button keypad in a standard telephone layout (1–9, 0, *, #), designed for easy user input with microcontrollers. The buttons are wired in a matrix...
A basic 12-button keypad in a standard telephone layout (1–9, 0, *, #), designed for easy user input with microcontrollers. The buttons are wired in a matrix format, allowing a microcontroller to scan 7 output pins to detect which button is pressed.
Key Features
- 12-Button Matrix – Standard telephone layout (1–9, 0, *, #)
- 7-Pin Interface – 3 columns × 4 rows matrix scanning
- Low Contact Resistance – 10–150 ohms per keypress
- Simple Integration – Works with Arduino, Raspberry Pi, and other microcontrollers
Ideal For
- User input and PIN entry systems
- Arduino and microcontroller projects
- Access control and security systems
- Menu navigation interfaces
Jargon buster
Plain-language definitions for the technical terms used above.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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Keypad Pinout Diagram
Pinout · 19.1 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 556.4 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
