Matrix Keypad 12 Key (3×4)

12-Key Matrix Keypad – 3 Columns × 4 Rows This flexible membrane keypad provides twelve buttons for numeric entry, menus and custom control panels. Its self-adhesive backing allows it to attach to a clean, flat enclosure surface, while the ribbon cable connects the key matrix to your controller. Specifications • Layout: 4 rows × 3 columns, 12 keys total. • Connection: 7-pin female header. • Connector pitch: 2.54mm. • Listed keypad dimensions: 76 × 69mm. • Listed flat-cable length: 70mm. • Construction: flexible membrane with adhesive backing. Project Integration The seven connections correspond to four rows and three columns. A controller scans the matrix to identify the pressed key; use a compatible keypad library or your own scanning routine. Confirm the row and column pin order before wiring. Suitable projects include Arduino input panels, Raspberry Pi GPIO interfaces, code-entry demonstrations and menu controls. Configure the circuit for the logic voltage of your controller.