5-Set I2C 4x4 Matrix Membrane Keypad
5-Set I2C 4x4 Matrix Membrane Keypad is backordered and will ship as soon as it is back in stock.
Warranty
Warranty
12-month warranty on defects and faults. Low-cost hobby-grade parts carry a 90-day warranty.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. To start a return, reply to your order confirmation email describing the fault and our support team will be in touch within 3 business days.
Delivery and shipping
Delivery and shipping
Free standard shipping within Australia on orders over A$55.
Orders ship within one business day of payment, provided the item is in stock. Standard post is typically 5–9 business days; Express is 1–2 business days to metro areas. We ship worldwide via Australia Post and DHL.
5-Set I2C 4x4 Matrix Membrane Keypad
5-Set I2C 4x4 Matrix Membrane Keypad is backordered and will ship as soon as it is back in stock.
Stuck? Ask the people who made it
Email office@lonelybinary.com with your setup and what it is doing. Our product team answers within 24 hours.
Description
Description
- 5-SET SOFT KEYPAD KIT (5 KEYPADS + 5 I2C ADAPTERS) Includes 5 flexible soft 4x4 matrix keypads (16 keys each), 5 I2C adapters to simplify connections, and a storage container — suitable for multiple projects or backups.
- SOFT MEMBRANE KEYPADS WITH EASY MOUNTING Each keypad has a flexible design with double-sided adhesive tape on the back for attachment to project boxes, desks, or enclosures — for custom interfaces in robotics, security systems, or prototypes.
- GPIO-SAVING I2C ADAPTERS The included adapters enable I2C communication using just 2 GPIO pins (SDA and SCL) instead of the traditional 8, freeing up pins on your microcontroller. Compatible with Arduino, Raspberry Pi, ESP32, and more.
- WIDE COMPATIBILITY Keypads and adapters support 3.3V to 5V operation for a wide range of MCUs. Easy to program with libraries like Keypad_I2C for quick setup.
- VERSATILE APPLICATIONS Use these 4x4 keypads for numeric entry, menu navigation, or custom controls in IoT devices, home automation, smart locks, and educational projects. Soft, responsive keys provide tactile feedback in a compact form.
Specifications
| Brand | LONELY BINARY |
|---|---|
| Compatible Devices | Arduino, Arduino UNO, ESP32, ESP32-S3, Raspberry Pi, Raspberry Pi Pico, ESP8266, STM32 |
| Connectivity Technology | I2C Digital 4×4 Matrix Keypad Interface GPIO (via I2C adapter) |
| Keyboard Description | Numeric |
| Recommended Uses For Product | DIY electronics prototyping, IoT control panels, Keypad input for microcontroller projects, access control systems, robotics interfaces DIY electronics prototyping, IoT control panels, Keypad input for microcontroller projects, access control systems, robotics interfaces |
| Special Feature | Built-in adhesive backing for easy mounting on panels and enclosures, I2C interface, GPIO-saving (2-pin), 4x4 16-key matrix, soft membrane, adhesive backing, PCF8574 adapter included, 3.3V/5V compatible, Multiple keypads supported on a shared I2C bus using PCF8574-based adapters, Soft membrane 4×4 matrix keypad with 16 clearly labeled keys, Wide voltage support from 3.3V to 5V for broad microcontroller compatibility Built-in adhesive backing for easy mounting on panels and enclosures, I2C interface, GPIO-saving (2-pin), 4x4 16-key matrix, soft membrane, adhesive backing, PCF8574 adapter included, 3.3V/5V compatible, Multiple keypads s… See more |
| Style | 5 Set (Keypads 4x4 16 keys +I2C Adapters) |
| Material | Flexible membrane keypad |
| Included Components | 5 × 4x4 soft membrane matrix keypads, 5 × I2C adapter modules |
| Model Name | 4x4 Matrix Keypad Kit |
Payment & Security
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