4x4 Matrix Membrane Type Keypad - 16 Keys (Buy 2 Get Free 2 LED)

Specification

• Size: 70mm x 77mm
• Key arrangement: 4 by 3 Grid
• Waterproof and dustproof
• Power Source: DC
• RoHS Compliant
• Material: Plastic

Description

A 4×3 matrix membrane type keypad typically consists of 12 keys arranged in a 4 by 3 grid format. Here are some short specifications for such a keypad:

1. Size: The keypad is designed to be compact and usually measures around 70mm x 77mm.

2. Construction: It is constructed using a thin, flexible membrane material that is pressure-sensitive. The keys are printed on the top surface of the membrane.

3. Key arrangement: The keys are arranged in a 4 by 3 grid, resulting in a total of 12 keys. The rows are labeled as R1, R2, R3, and R4, while the columns are labeled as C1, C2, and C3.

4. Interface: The keypad typically uses a standard 8-pin interface for connection. The pins are assigned for row and column scanning to detect key presses.

5. Keypad life: Membrane keypads are designed to have a long lifespan. They can withstand a large number of actuations, usually rated for hundreds of thousands or millions of presses.

6. Tactile feedback: Membrane keypads often provide a tactile feedback mechanism, such as a dome switch beneath each key. This gives the user a physical sensation when a key is pressed.

7. Waterproof and dustproof: Many membrane keypads are designed to be waterproof and dustproof, making them suitable for use in various environments.

8. Customizable printing: The key labels can be customized to fit specific requirements, allowing for alphanumeric, numeric, or symbol printing.

9. Low profile: The keypad has a low profile design, making it suitable for applications where space is limited.

10. Easy integration: These keypads are relatively easy to integrate into electronic devices or projects, requiring minimal wiring and connections.

It’s important to note that specific keypad models may have additional features or specifications, so it’s always recommended to refer to the datasheet or product documentation for detailed information.

Desc:

A 4×3 matrix membrane-type keypad is a type of input device that consists of 12 keys arranged in a grid of four rows and three columns. Each key on the keypad represents a unique input or command that can be sent to a device or system.

The keypad is constructed using a thin, flexible membrane made of polyester or similar material. This membrane has conductive traces printed on it, creating a matrix of intersecting rows and columns. The keys themselves are typically made of rubber or silicone and have a conductive pad on the bottom.

When a key is pressed, it makes contact with the conductive pad on the membrane, creating a connection between a specific row and column in the matrix. The keypad circuitry detects this connection and registers the corresponding key press.

The 4×3 configuration allows for a compact and efficient design, suitable for a variety of applications. The keys can be labeled with alphanumeric characters, symbols, or specific functions, depending on the intended use. Common applications of a 4×3 matrix keypad include numeric entry, menu navigation, password input, and control panel interfaces.

To interface with a device or system, the keypad is typically connected to a microcontroller or similar circuitry that processes the key presses and translates them into usable data or commands. This can be achieved by scanning the rows and columns of the matrix to determine which key has been pressed.

Overall, a 4×3 matrix membrane-type keypad provides a simple and reliable input solution with a compact form factor, making it suitable for a wide range of electronic devices and systems.