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मूल्य सूची: Retail Price (B2C) मूल्य सूची
मूल्य सूची: Retail Price (B2C) मूल्य सूची
4x4 Matrix Membrane Keypad – 16-Key Ultra-Thin Tactile Interface for Arduino & Embedded Systems

4x4 Matrix Membrane Keypad – 16-Key Ultra-Thin Tactile Interface for Arduino & Embedded Systems

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FeatureDetails
Configuration4x4 Matrix (16 Keys)
TypeMembrane (Tactile Switch)
Connector8-Pin Female Dupont (2.54mm Pitch)
Voltage Rating35V DC, 100mA
MountingSelf-Adhesive Backing
Cable TypeFlexible Ribbon Cable
Price
₹ 50.85 ₹ 50.85
(Tax included)

बारकोड: 3998593

Product Description The 4x4 Matrix Membrane Keypad is an ultra-thin, flexible input solution perfect for projects requiring comprehensive alphanumeric or numeric data entry. This 16-button keypad features 0-9 numeric keys plus A-D function keys, asterisk (*), and hash (#). Its lightweight, low-profile design includes a strong 3M adhesive backing for seamless mounting onto any clean, flat surface. Built from multiple layers of high-quality PET with conductive silver ink traces, it is resistant to dust and light moisture. It interfaces with microcontrollers like Arduino, ESP32, and Raspberry Pi using 8 digital pins via a matrix scanning technique, providing a professional user interface for security systems, calculators, and industrial control prototypes.

Key Features

  • 16-Key Comprehensive Layout: Includes a full numeric set (0-9) and four function keys (A, B, C, D) for advanced menu navigation.

  • Ultra-Thin & Flexible: At only 0.8mm thick, it adds virtually no bulk to your project enclosure, maintaining a sleek aesthetic.

  • Strong Adhesive Backing: Pre-applied 3M industrial adhesive ensures a permanent bond to plastic, metal, or glass panels.

  • Sealed Membrane Surface: Protects internal conductive traces from dust, dirt, and water splashes, ensuring long-term reliability.

  • Standard 8-Pin Interface: Features a 2.54mm pitch female Dupont connector on a flexible ribbon cable for easy connection to standard headers.

Technical Details

  • Scanning Architecture: Row-column matrix design; a keypress creates a momentary electrical bridge between one of the 4 row pins and 4 column pins.

  • High Conductivity Traces: Employs high-grade silver ink circuitry to ensure low contact resistance and sharp signal detection.

  • Minimal Contact Bounce: Engineered for a bounce time of less than 5ms, allowing for rapid and accurate data entry.

  • Logic Compatibility: Passive switch array works perfectly with 1.8V, 3.3V, 5V, or 12V logic levels.

  • Tactile Feel: Provides a soft-touch response with an actuation force of approximately 150g to 350g.

  • Ribbon Cable Durability: The PET flexible cable is designed to withstand multiple bends during installation inside tight enclosures.

  • Environmental Tolerance: Operates reliably in humidity levels up to 90% (non-condensing).

  • Dielectric Strength: The insulating layers are rated to withstand up to 250V RMS, preventing accidental signal cross-talk.

  • Key Pitch: Optimized spacing prevents accidental double-key presses during fast numeric entry.

  • Power Efficiency: Draws zero power in standby mode; current only flows during the millisecond of a scanning cycle.

  • Pin Configuration: 8 Pins (Rows 1-4 and Columns 1-4).

  • UV Stability: Graphic overlay is designed to resist fading and degradation under standard indoor environmental conditions.

  • Library Support: Fully compatible with the standard "Keypad.h" library in the Arduino IDE for instant software integration.

  • Compact Electronics: The sealed design eliminates the need for bulky mechanical switches and PCBs behind the interface panel.

  • Industrial Utility: Widely utilized in security access panels, DIY calculators, and smart vending machine prototypes.

Prototyping and Engineering Tips from Robogears

  • 9V Battery Use: This keypad is a passive matrix. While it can handle 9V signal levels, always ensure your microcontroller pins are protected. We recommend powering the Arduino/MCU via 9V and using its regulated 5V/3.3V pins to scan the keypad.

  • 18650 Cell: Ideal for battery-powered IoT devices. Since it consumes zero power at rest, it is perfect for "sleep-and-wake" circuits using a single 18650 cell to maximize standby time.

  • IC & Capacitor Tip: If you are short on I/O pins, use an I2C PCF8574 I/O Expander IC to connect all 8 pins of the keypad using only 2 wires (SDA/SCL). To prevent "ghosting" or noise in long cables, add a 0.1uF ceramic capacitor across the power rails of your pull-up network.

  • Related Products: We recommend pairing this with our 20x4 I2C LCD Displays, Electronic Solenoid Locks, and Arduino Mega 2560 for complex security and automation systems.

Package Includes

  • 1 x 4x4 Matrix Membrane Keypad (16-Key).

Disclaimer Image is for ilastration purpose only 2-3 lines. Avoid making sharp 90-degree folds in the flexible ribbon cable, as this can crack the silver traces. Ensure the surface is thoroughly cleaned with alcohol before applying the adhesive for the strongest bond.