Keypad

Component Technical Specifications

The Keypad Module (commonly 4x4 or 4x3) is a vital input device for engineering students. It uses a matrix scanning method to reduce pin usage on microcontrollers. With a durable membrane or tactile design, it’s perfect for building security systems, calculators, and digital locks requiring numeric data entry.

Popular Keypad Modules

For makers, these modules offer a reliable way to add user authentication or menu navigation to any project.

Best for Sleek DesignsThe 4x4 Matrix Membrane Keypad is ultra-thin and features an adhesive backing, making it easy to mount on project enclosures for a professional finish.

Best for Tactile FeedbackThe 4x4 Matrix 16 Key Push Button Keypad uses physical buttons that provide a satisfying "click" when pressed, ensuring better accuracy for industrial control prototypes.

Best for Simple InputsThe 4x1 Matrix Membrane Keypad is a compact 4-key strip, ideal for basic mode selection or reset functions where a full numeric pad isn't necessary.

Technical Specifications

Circuit TypeMatrix Scanning (e.g., 4 rows and 4 columns for 16 keys).

ConnectorStandard 2.54mm pitch female header for easy jumper wire connection.

Operating VoltageUp to 35V DC, compatible with all logic levels.

Contact ResistanceTypically <100Ω, ensuring reliable signal transmission.

DurabilityRated for up to 1 million actuations (membrane style).