LONELY BINARY 5-Set I2C 4x4 Matrix Membrane Keypad for Arduino ESP32 Pico | 5 soft keypads + 5 I2C adapters; 16 keys each, 2-pin (SDA/SCL) saves GPIO; 3.3V/5V; adhesive backing; storage case; Pi, STM32
US$8.00
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US$8.00
Price when purchased online
Free shipping
Free 30-day returns
Sold and shipped by www.jacinte.com
Free 30-day returns Details
Product details
| Management number | 234213887 | Release Date | 2026/06/27 | List Price | US$8.00 | Model Number | 234213887 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
- 【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.
| ASIN | B0G2KZW8KX |
|---|---|
| Brand | LONELY BINARY |
| Model Name | 4x4 Matrix Keypad Kit |
| Style Name | 5 Set (Keypads 4x4 16 keys +I2C Adapters) |
| Unit Count | 5.0 Count |
| Manufacturer | LONELY BINARY |
| Model Number | 4x4 Matrix Keypad Kit |
| Power Source | Wired |
| BuiltIn Media | 5 × 4x4 soft membrane matrix keypads, 5 × I2C adapter modules |
| Number of Keys | 80 |
| Keyboard Layout | QWERTY |
| Mfr Part Number | 4x4 Matrix Keypad Kit |
| Antenna Location | DIY electronics prototyping, IoT control panels, Keypad input for microcontroller projects, access control systems, robotics interfaces |
| Hand Orientation | Ambidextrous |
| Compatible Devices | Arduino, Arduino UNO, ESP32, ESP32-S3, Raspberry Pi, Raspberry Pi Pico, ESP8266, STM32 |
| Enclosure Material | Flexible membrane keypad |
| Additional Features | 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 |
| Keyboard Description | Numeric |
| Warranty Description | 1 YEAR |
| Connectivity Technology | I2C Digital 4×4 Matrix Keypad Interface GPIO (via I2C adapter) |
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