The Keypad 4×4 Self-Adhesive 16 key is Diaphragm keypad equipped with 16 key in 4 x 4 arrangement. It has numbers: from 0 to 9, letters: A, B, C, D and special characters: *and #. On the back of the keyboard there is a self-adhesive tape for easy installation. The keyboard is equipped with 8-pin tape with a 2.54 mm grid, so it can be connected to the main module, such as Arduino or STM32 using connection cables or through a gold pin strip. The keyboard can be used as a data input device.
Features:
- 16 Keys (4×4 Matrix) Provides a total of 16 buttons arranged in a 4-row by 4-column grid.
- Self-Adhesive Backing Peel-and-stick design for easy mounting on surfaces.
- Flexible and Thin Design Ideal for compact electronics applications.
- Durable and Water-Resistant Protects against dust, dirt, and moisture.
- Easy Interface with Microcontrollers Compatible with Arduino, Raspberry Pi, PIC, AVR, and other microcontrollers.
- Long Lifespan rated for more than 1 million key presses.
- Simple 8-Wire Connection Requires only 8 I/O pins for scanning.
- Pre-labeled Buttons Includes numbers (0-9), letters (A-D),
*and#.
Specifications:
| Specification | Value |
|---|---|
| Number of Keys: | 16 Keys |
| Layout: | 4 Rows × 4 Columns |
| Operating Voltage: | 3–5V DC |
| Operating Current: | 100mA |
| Contact Resistance: | ≤ 500Ω |
| Insulation Resistance: | ≥ 100MΩ |
| Dielectric Strength: | 250Vrms |
| Connector Type: | Female Header |
| Number of Pin Connector: | 8 Pins |
| Pitch of Pin Connector: | 2.54mm |
| Flat Cable Length: | 70mm |
| Dimensions: | 76mm × 69mm |
| Material: | Flexible Membrane with Self-Adhesive Backing |
| Operating Temperature Range: | -40°C to +85°C |
| Humidity: | 40% to 80% RH, Non-Condensing |
| Key Life: | > 1 Million Presses |
How to connect the keyboard:
The keyboard can be connected in two ways. The layout of the outputs is shown in the figure below.
| Pin Number | Description |
| ROWS | |
| 1 | PIN1 is taken out from 1st ROW |
| 2 | PIN2 is taken out from 2nd ROW |
| 3 | PIN3 is taken out from 3rd ROW |
| 4 | PIN4 is taken out from 4th ROW |
| COLUMN | |
| 5 | PIN5 is taken out from 1st COLUMN |
| 6 | PIN6 is taken out from 2nd COLUMN |
| 7 | PIN7 is taken out from 3rd COLUMN |
| 8 | PIN8 is taken out from 4th COLUMN |
Applications:
- Microcontroller and Embedded Systems.
- Security and Access Control Systems.
- Home Automation.
- Industrial Applications.
- Communication and Telephony Devices.
- Consumer Electronics.
- Gaming and Simulations.
- Medical and Laboratory Equipment.
- Educational and Learning Kits.
- Menu-Based Systems.
Package Contents:
- 1x Keypad 4×4 Self-Adhesive 16 key