Membrane Keypad 4×5
The Membrane Keypad 4×5 is a compact, lightweight input device with 20 tactile push buttons arranged in a 4-row × 5-column matrix. Designed for embedded systems, automation, and access control, it provides a simple, reliable solution for numeric entry, password protection, or menu navigation.
Built with a flexible PET material, the keypad features a self-adhesive back and connects using a 9-pin flat ribbon cable, making it quick to install on enclosures or control panels. It’s an excellent addition to microcontroller projects requiring multiple user inputs.
🛠 Technical Details
| Specification | Details |
|---|---|
| Keypad Layout | 4 Rows × 5 Columns |
| Total Keys | 20 (0–9, A–D, *, #, custom) |
| Interface Pins | 9-pin ribbon connector |
| Operating Voltage | 3.3V – 5V |
| Contact Resistance | < 500Ω |
| Keypad Material | PET (polyester) with carbon ink tracing |
| Mounting | Adhesive backing |
| Cable Length | ~85mm |
| Key Lifespan | >1 million presses |
| Dimensions | ~76mm × 69mm |
| Weight | ~12g |
💡 Use Cases & Applications
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🔐 Access Control Panels: Use the full number set and extra keys for pin/password input in security projects.
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📊 Menu Navigation & Function Control: Ideal for scrolling and selecting options in user interface projects.
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🔢 Numeric Entry Terminals: Use in calculator-style input projects, vending machine prototypes, or ATMs.
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🤖 Robot Control Interfaces: Trigger specific behaviors or movement modes on robots using unique keys.
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📟 IoT Keypads: Use with ESP32, NodeMCU, or other wireless modules for remote-control systems.
🛠️ Pair With (Internal Links)
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📦 Integrates well with Arduino Boards and expansion shields
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⚡ Get clean power using our Power Supplies
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🧩 Combine with Electronic Components like resistors and pull-ups for stable readings
🎥 YouTube Tutorial
📺 Learn how to read multi-keypad matrices:
👉 Matrix Keypad Arduino Tutorial
⚠️ Precautions & Tips
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🔌 Ensure no loose connections on the ribbon header to avoid false key reads.
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🧠 Debounce input via software for accurate multi-press handling.
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📐 Label keys in your code for custom functions or mapped commands.
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🚫 Avoid prolonged exposure to moisture to retain responsiveness.
🏁 Summary & CTA
The 4×5 Membrane Keypad offers an extended range of user input options in a thin, flexible, and easy-to-install format. Perfect for advanced Arduino or embedded projects where functionality meets compact design.
👉 Get yours now from Electroway and expand your project’s interactivity!
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