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LONELY BINARY

5-Sets I2C Soft 4x4 Matrix Keypad Kit - 5pcs Soft Membrane Keypads 4 x 4 16 Keys Keyboard Switch Module, 5pcs I2C Adapters for GPIO Savings for Arduino, Raspberry Pi, ESP32 Projects

Name: LONELY BINARY 5-Sets I2C Soft 4x4 Matrix Keypad Kit - 5pcs Soft Membrane Keypads 4 x 4 16 Keys Keyboard Switch Module, 5pcs I2C Adapters for GPIO
Brand: LONELY BINARY
SKU: B0G2KZW8KX
Price: 19.99 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$19.99

Buy on Amazon — $19.99 Compare to similar single board computers

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.

Bottom line: The 5-Sets I2C Soft 4x4 Matrix Keypad Kit - 5pcs Soft Membrane Keypads 4 x 4 16 Keys Keyboard Switch Module, 5pcs I2C Adapters for GPIO Savings for Arduino, Raspberry Pi, ESP32 Projects is a niche pick — read recent reviews before buying in the single board computers category, priced around $19.99. Read recent reviews carefully before committing.

SpecPicks Verdict

SpecPicks classifies LONELY BINARY 5-Sets I2C Soft 4x4 Matrix Keypad Kit - 5pcs Soft… as a niche pick — read recent reviews before buying in the single board computers category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. LONELY BINARY's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for single board computers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Backed by LONELY BINARY's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

【Comprehensive 5-Sets Soft Keypad Kit (5 keypads+5 I2C adapters ) for DIY Enthusiasts】This kit comes with 5 flexible soft 4x4 matrix keypads (16 keys each), 5 I2C adapters to simplify connections, and a convenient storage container to keep everything organized and protected—perfect for multiple projects or backups without needing to reorder.
【Soft Membrane Keypads with Easy Mounting】Each keypad features a durable, flexible design with double-sided adhesive tape on the back, allowing secure attachment to hard surfaces like project boxes, desks, or enclosures—ideal for custom interfaces in robotics, security systems, or interactive 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 valuable pins on your microcontroller for other components—compatible with Arduino, Raspberry Pi, ESP32, and more.
【Genuine Lonely Binary Quality and Compatibility】Built by Lonely Binary, a reliable brand for maker electronics, these keypads and adapters support 3.3V to 5V operation, ensuring seamless integration with a wide range of MCUs; easy to program with popular libraries like Keypad_I2C for quick setup.
【Versatile Applications for Makers and Hobbyists】Use these 4x4 keypads for numeric entry, menu navigation, or custom controls in IoT devices, home automation, or educational projects; the soft, responsive keys provide tactile feedback while being compact and lightweight.

Full Specifications

Brand	LONELY BINARY
Style	5 Set (Keypads 4x4 16 keys +I2C Adapters)
Material	Flexible membrane keypad
Model Name	4x4 Matrix Keypad Kit
Style Name	5 Set (Keypads 4x4 16 keys +I2C Adapters)
Unit Count	5.0 Count
Model Number	4x4 Matrix Keypad Kit
Power Source	Wired
Compatibility	Switch
Built-In 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

Ready to buy?

LONELY BINARY 5-Sets I2C Soft 4x4 Matrix Keypad Kit - 5pcs Soft Membrane Keypads 4 x 4 16 Keys Keyboard Switch Module, 5pcs I2C Adapters for GPIO Savings for Arduino, Raspberry Pi, ESP32 Projects is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.