4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key)
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4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key)
The keyboard matrix allows you to quickly add controls to your electronic projects.
4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key)
Artigo n.º: 227431720

4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key)

Artigo n.º: 227431720

STD 582195

Price Details

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*All items will import from EUA

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EUA Importado da loja USA
Encomende já e receba por volta de Quinta-feira, Julho 23
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The keyboard matrix allows you to quickly add controls to your electronic projects.
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O que se Destaca

Compact Design
This 4PCS keypad module offers a compact design, ideal for space-constrained applications, making it perfect for DIY electronics projects or embedded systems.
Easy Integration
Designed for seamless integration with microcontrollers, the 3x4 matrix layout simplifies connection and programming, saving time for developers and hobbyists.
Durability
Built with quality components, this keypad ensures durability and reliability, providing long-lasting performance for various applications, from robotics to home automation.

Detalhes do produto

Shop 4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key) online at a best price in São Tomé and Príncipe. B0DFGM8ZPB
Item Weight0.2 lbs (90 grams)

Quem Deverá Comprar?

Suitable For
  • Electronics Hobbyists

    Ideal for DIY projects where users need an external keypad for various electronic applications and microcontroller interfaces.

  • Educational Purposes

    A great tool for students learning about microcontrollers, keypads, and circuit design in electronics courses.

  • Robotics Projects

    Useful in robotics applications for user inputs, allowing control of various functions through keyboard commands.

Not Suitable For
  • Professional Applications

    Not suitable for high-end professional systems requiring robust, reliable input methods with extensive functionality.

  • High-Traffic Use

    May not withstand heavy usage over time as it is designed primarily for hobbyist and light-use applications.

  • Non-Electronic Users

    Not ideal for individuals without electronics knowledge who may struggle with integrating the keypad into projects.

DESCRIÇÃO DO PRODUTO

4PCS 3x4 Matrix Keypad 12 Keyboard Module External Keypad Board for Microcontroller (12Key)

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Perguntas e Respostas dos Clientes

  • pergunta: What is a 3x4 Matrix Keypad and how does it work?

    Resposta: A 3x4 Matrix Keypad is an electronic component consisting of a grid of keys arranged in three rows and four columns, totaling 12 keys. Each key press is detected via a combination of row and column contacts that are connected to a microcontroller, facilitating user input for various applications. This setup allows for efficient scanning and minimizes the number of input pins needed for operation. Typical use cases include numeric inputs for devices like alarm systems, access control, or DIY electronics projects where a compact keypad interface is required.
  • pergunta: Can I use the 3x4 Matrix Keypad with different microcontrollers?

    Resposta: Yes, the 3x4 Matrix Keypad is compatible with a variety of microcontrollers, including popular ones like Arduino, Raspberry Pi, and PIC. The wiring typically involves connecting row and column pins of the keypad to the GPIO pins of the microcontroller. Given its adaptability, this keypad can be utilized in projects ranging from home automation systems to robotics, allowing users to create custom interfaces for various applications.
  • pergunta: What types of projects can the 3x4 Matrix Keypad be used for?

    Resposta: The 3x4 Matrix Keypad is versatile and can be employed in numerous electronics projects, such as alarm systems, code entry systems, remote controls, or as a user interface for embedded devices. By providing a straightforward way to input numbers or commands, hobbyists often incorporate it into Arduino-based projects or as a control panel for custom electronic designs, enhancing user interaction.
  • pergunta: How do I wire the 3x4 Matrix Keypad to my microcontroller?

    Resposta: Wiring the 3x4 Matrix Keypad involves connecting its 7 pins to the GPIO pins of your microcontroller. Typically, the keypad has 3 pins for rows and 4 pins for columns. You can designate any 7 digital pins on your microcontroller for this purpose. After connecting, programming libraries such as Keypad for Arduino can simplify the process of detecting key presses. This method ensures that your electronic project remains efficient while involving minimal wiring complexity.
  • pergunta: What features should I look for in a keypad module?

    Resposta: When selecting a keypad module, consider factors like key responsiveness, durability, size, and ease of integration with your existing components. A quality 3x4 Matrix Keypad will typically offer tactile feedback for each key press, ensuring a satisfying user experience. Moreover, compatibility with various microcontrollers and the availability of accompanying libraries can ease the development process for any electronic project you undertake.
  • pergunta: Is the 3x4 Matrix Keypad suitable for commercial applications?

    Resposta: Yes, the 3x4 Matrix Keypad can be suitable for commercial applications, particularly in products requiring numeric input, like point-of-sale terminals, appliance controls, or industrial equipment interfaces. Its compact size and simplicity make it a cost-effective solution for integrating user inputs into various electronic systems, thus enhancing product functionality in commercial settings.
  • pergunta: How durable is the 3x4 Matrix Keypad?

    Resposta: The durability of a 3x4 Matrix Keypad largely depends on its design and construction materials. Good quality keypads typically feature robust key switches and a well-designed substrate, allowing them to withstand frequent use. When used in applications that demand high reliability, such as security systems or user interfaces, selecting a keypad with proven durability is essential for maintaining operational integrity over time.
  • pergunta: Can I customize the key layout on my keypad?

    Resposta: Yes, you can customize the key layout on a 3x4 Matrix Keypad during programming. By modifying the code used to read inputs, you can assign different functions or outputs to each key according to the requirements of your project. For instance, you might want to create a custom command sequence for a home automation system, allowing users to control lights or appliances easily. This flexibility makes it an ideal choice for tailored electronic projects.
  • pergunta: Is it beginner-friendly to work with the 3x4 Matrix Keypad?

    Resposta: Absolutely! The 3x4 Matrix Keypad is designed for ease of use, making it suitable for beginners and seasoned developers alike. With tutorials readily available and libraries like the Keypad library for Arduino simplifying the coding process, newcomers can quickly learn to integrate this keypad into their projects. Whether you're creating your first electronic device or experimenting with more complex systems, it serves as a great introduction to keypad functionalities.
  • pergunta: Where can I buy the 4PCS 3x4 Matrix Keypad 12 Keyboard Module for Microcontroller in São Tomé and Príncipe?

    Resposta: You can purchase the 4PCS 3x4 Matrix Keypad 12 Keyboard Module for Microcontroller on Ubuy, a reliable online platform that offers a wide selection of electronic components and modules. Ubuy provides access to international shipping options, ensuring that you receive your keypads efficiently. Their user-friendly interface allows you to easily locate and order your required components for your projects.

SazkJere Access-Control Keypads Editorial Review

**Editorial Review** The 4PCS 3x4 Matrix Keypad has garnered a significant amount of criticism from users primarily focused on its Construction and functionality. While some users acknowledge the adequate quality of the keypad in terms of mechanics and electrical design, a recurring theme in the feedback is the incorrect pinout provided with the product. This discrepancy has led to frustrations, particularly for those integrating the keypad into existing Arduino designs, necessitating rewiring efforts that complicate the setup process. A central issue that many customers encountered pertains to the button functionality. Multiple users reported that the keys failed to provide continuity, attributing this issue to a film covering the contact pads that prevented proper connection. Although a few users managed to salvage their experience by cleaning the pads, they noted that this resulted in unreliable performance rather than a Consistent response. Worse still, the printed circuit board's Construction was heavily criticized. Users highlighted that the copper traces were prone to breaking during soldering, indicating poor quality control during manufacturing. This defect made it exceedingly challenging for users to create reliable connections without damaging the board itself. Overall, the feedback paints a picture of a product that suffers from mechanical and functional inadequacies, making it difficult for users to recommend it for reliable applications in their projects. **

Avaliações e Classificações dos Clientes

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Prós

  • Adequate mechanical and electrical quality perceived by some users.

Contras

  • Incorrect pinout provided with the product.

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12 June 2026 · via Trustpilot
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STD 582195

Encomende já e receba por volta de Quinta-feira, Julho 23

QTY:

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Os nossos principais Parceiros Logísticos
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  • dhl
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Recursos e benefícios

  • 12-button keypad with numbers 0-9, *, and #.
  • Compact size of 7*5*1 cm and lightweight at 19g.
  • Easy integration with any microcontroller for seamless connectivity.
  • Ideal for applications like password security systems and gate lock keypads.
  • 3x4 matrix design for efficient input management.
  • Includes 4 keypads for multiple project uses.

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