membrane keypad

20-key membrane matrix keypad for Arduino, ESP32 and embedded electronics projects. The flexible 4×5 keypad provides an easy user-input interface for passwords, menus, access-control systems and DIY electronic devices.

Layout: 4 × 5 Matrix
Number of Keys: 20
Interface: GPIO Matrix
Connections: 9
Switch Type: Momentary membrane
Mounting: Self-adhesive backing
Best For: Password entry, access control, menus and microcontroller projects