{"product_id":"4-3-matrix-12-keys-membrane-switch-keypad","title":"4×3 Matrix 12 keys Membrane Switch Keypad","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003e\u003cstrong\u003e4×3 Matrix 12 keys Membrane Switch Keypad\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003eThe \"Membrane\" design consists of two layers of flexible plastic with conductive silver ink traces. When you press a button, you are physically pushing the two layers together to complete a circuit. Because it has no moving mechanical parts, it is resistant to dust and can survive millions of presses.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003e\u003cstrong\u003eWhy it’s a Project Essential:\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e• The Matrix Efficiency: In a standard setup, 12 buttons would require 12 pins. By using a Matrix (Rows x Columns), the keypad only needs 7 pins. The microcontroller \"scans\" the keys by turning one row on at a time and checking which column becomes active.\u003cbr\u003e• Professional Mounting: The back of the keypad features a strong adhesive. You can simply cut a small slit in your project box for the ribbon cable and stick the keypad directly to the surface.\u003cbr\u003e• Tactile Feedback: Despite being thin, these \"soft-touch\" buttons provide a slight tactile click, letting the user know the press was successful.\u003cbr\u003e• Universal Connector: The 7-pin female header has a standard 2.54mm pitch, meaning it plugs directly into breadboards or standard male-to-male jumper wires.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003eTechnical Capabilities:\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e• Key Layout: 12 keys (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, #).\u003cbr\u003e• Interface: 7 pins (typically labeled R1, R2, R3, R4 and C1, C2, C3).\u003cbr\u003e• Compatibility: Works flawlessly with 3.3V and 5V systems like Arduino, ESP32, and \u003c\/span\u003e\u003cspan\u003eRaspberry Pi.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003eThe 4×3 keypad is the primary choice for digital door locks, calculator projects, alarm system arming panels, and setting-driven menus in industrial machines.\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"TinkEdge","offers":[{"title":"Default Title","offer_id":46404740874439,"sku":"TE-KEYPA-094","price":64.2,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6620\/6407\/files\/4x3Matrix12keysMembraneSwitchKeypad_1.png?v=1776771253","url":"https:\/\/shop.tinkedge.tech\/products\/4-3-matrix-12-keys-membrane-switch-keypad","provider":"TinkEdge","version":"1.0","type":"link"}