Looking for Keyboard Module? 4×4 Matrix 16 Push Button Keyboard Module is available at Zbotic with fast shipping across India.
PRODUCT DESCRIPTION
A 4 x 4 matrix keypad is a common input device for projects. It has 16 keys that share the same input values. The 4 x 4 Matrix Keypad Module is a non-encoded keypad with 16 keys arranged in parallel. The keys are connected to the external pins by rows and columns – pins R1-R4 control the rows, while pins L1-L4 control the columns.
The keypad consists of microswitch buttons on a 4×4 matrix. The module has four 3mm (M3) holes for mounting. Each PCB has the pin designations shown on it. Four pins are used as the ‘x’ coordinate and the other four as the ‘y’ coordinate.
The module comes with pin headers already soldered (rotated 90 degrees).
How it Works:
To test whether any key is pressed, connect power to the rows, so they are at High level. Then set all the rows R1-R4 to Low and check the status of the columns. If any column is Low, it means a key is pressed and it belongs to that column. If all columns are High, it means no key is pressed. To locate the key, identify the row where the key is pressed. Set the rows to Low one by one until one of them changes the column status – the other rows will remain High.
The row that changes the column status is the one where the key is pressed. Check each column one by one to find which one is Low. The intersection of that column and row is the key that is pressed.
Note: This keyboard module is available in red and black colours of push-button, we will ship it randomly.
Features:
- 4×4 Matrix Keyboard Module with 16 buttons
- Small in size and hence Save space
- More convenient to use
- Expanded development application modules for single chip
- With 16 keys and 8 pin
Specification:
| Switch Type | Momentary |
|---|---|
| Pin Spacing (mm) | 2.54 |
| Length (mm): | 57 |
| Width (mm) | 33 |
| Height (mm) | 6 |
| Weight (gm) | 10 |
| Shipping Weight | 0.015 kg |
| Shipping Dimensions | 8 × 6 × 2 cm |
Package Includes:
1 x 4×4 Matrix 16 Push Button Keyboard Module
4×4 Matrix 16 Push Button Keyboard Module Overview
The 4×4 Matrix 16 Push Button Keyboard Module is a compact input device featuring 16 individual microswitch buttons arranged in a 4×4 grid. Designed for easy integration with microcontrollers and single-chip systems, it provides a reliable and space-saving way to capture numeric or command inputs.
Key Features of 4×4 Matrix 16 Push Button Keyboard Module
- 16 tactile microswitch buttons arranged in a 4×4 matrix
- 8-pin interface labeled R1–R4 (rows) and L1–L4 (columns)
- Compact PCB dimensions: 39 mm × 43 mm × 6 mm
- Four 3 mm mounting holes for secure panel installation
- Pre-soldered 90° pin headers for plug-and-play connection
- Fast shipping from Zbotic across India
Applications and Use Cases
- Numeric entry for DIY calculators and handheld testers
- Menu navigation on Arduino or Raspberry Pi control panels
- Access code input in security and door-entry systems
- User commands for robotics and automation projects
- Custom remote controls in home automation setups
How to Use 4×4 Matrix 16 Push Button Keyboard Module
Mount the module using the four 3 mm holes, then connect the eight pins (R1–R4 and L1–L4) to digital I/O lines on your microcontroller. Use a keypad scanning routine—either a library or custom code—to drive each row low in turn and read column inputs, detecting key presses in the 4×4 grid.
Why Buy from Zbotic?
- Genuine Products: All items sourced from authorized distributors
- Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
- Free Shipping: Free delivery on qualifying orders
- COD Available: Cash on Delivery, UPI, cards, net banking
- Technical Support: Expert help for setup and troubleshooting
- Easy Returns: Hassle-free replacement for defective products
Frequently Asked Questions
How many pins are needed to connect this keypad?
This module requires eight digital I/O pins: four for rows (R1–R4) and four for columns (L1–L4) to perform the matrix scan.
What mounting options does the keypad offer?
The PCB includes four 3 mm (M3) mounting holes positioned at each corner, allowing you to secure it to panels or enclosures.
Are the pin headers pre-assembled?
Yes, the keypad comes with 90° pin headers already soldered, enabling immediate plug-in connections without additional soldering.
Technical Specifications
| Package Quantity | 16 pcs |
|---|---|
| SKU | AI3225 |
| Weight | 0.013 kg |
| Availability | In Stock |
Applications & Use Cases
The 4×4 Matrix 16 Push Button Keyboard Module is a versatile electronic switches/keypads modules used across a wide range of applications including electronics projects, DIY builds, prototyping, and educational experiments.
Common use cases:
- Integrating into a custom electronics project
- Learning and experimenting with circuits
- Replacing or upgrading components in existing setups
This product is ideal for electronics enthusiasts, engineers, and students.
Technical Tip: Always verify voltage and current requirements before connecting to your circuit. Check datasheets for detailed specifications and pin configurations.
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
