Keypad 4×4 Self-Adhesive 16 key

From the shop's description

Keypad 4×4 Self-Adhesive 16 key 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