The object of our scrutiny is the 4x4 Matrix Array 16 Key Keyboard a membrane switch keypad keyboard designed for use with Arduino/AVR systems.
With its compact size and versatile connectivity options, this keyboard is a compelling choice for those seeking an efficient input solution.

Impressively the 4x4 Matrix Array keyboard boasts a 4x4 matrix configuration and 16 keys, providing ample functionality in a small form factor. One of the key strengths of this keyboard is its compatibility with 8P Dupont connectors spaced at 2.54mm, making it easy to connect to a circuit by pin. Additionally, the keyboard features a pull-apart white paper backing allowing for simple attachment to a chassis. Contact resistance is rated between 10Ω-500Ω, with insulation resistance at 100MΩ 100V, ensuring reliable performance.

The biggest advantage of the 4x4 Matrix Array keyboard is its flexibility and ease of use making it a top choice for Arduino/AVR enthusiasts. However, some may find the limited number of keys to be a drawback, as it may not offer sufficient input options for more complex applications.

In other words the 4x4 Matrix Array 16 Key Keyboard for Arduino/AVR is an excellent choice for those seeking a compact and versatile input solution. Its impressive features, including a 4x4 matrix configuration and compatibility with 8P Dupont connectors, make it an attractive option for hobbyists and professionals alike. In my opinion, this product is a must-have for those looking for a reliable and easy-to-use keyboard for their Arduino/AVR projects.