{"product_id":"4x4-membrane-keypad-matrix-16-key-8pin-arduino","title":"4×4 Membrane Keypad Matrix — 16-Key, 8-Pin Connector, Arduino Compatible","description":"\u003ch2\u003e4×4 Membrane Keypad Matrix — 16-Key, 8-Pin Connector, Arduino Compatible\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003e4×4 membrane keypad\u003c\/strong\u003e provides 16 keys in a flexible, ultra-thin form factor — the membrane version of the tactile PCB keypad. Unlike the rigid PCB keypad, the membrane keypad is flexible, lightweight, and can be adhered to curved or flat surfaces with the built-in adhesive backing. It uses the same 4-row × 4-column matrix scanning principle and is compatible with the Arduino Keypad.h library. The 8-pin ribbon cable connector makes wiring straightforward.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeys:\u003c\/strong\u003e 16 (4 rows × 4 columns)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKey Labels:\u003c\/strong\u003e 1–9, *, 0, #, A, B, C, D (standard layout)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e 8-pin ribbon cable connector\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Membrane (flexible, thin)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdhesive Backing:\u003c\/strong\u003e Yes — peel and stick to any flat surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Voltage:\u003c\/strong\u003e 3.3V and 5V compatible (passive matrix)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMembrane vs Tactile PCB Keypad — Which to Choose?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMembrane (this listing):\u003c\/strong\u003e Flexible, thin, adhesive backing, water-resistant surface — for panel mounting and finished products\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTactile PCB keypad:\u003c\/strong\u003e Rigid, audible click, breadboard-friendly header — for prototyping and development\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eArduino Wiring (Keypad.h Library)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eConnect 8-pin ribbon cable to Arduino digital pins (e.g., D2–D9)\u003c\/li\u003e\n  \u003cli\u003eInstall Keypad.h library from Arduino Library Manager\u003c\/li\u003e\n  \u003cli\u003eDefine key map, row pins, and column pins in sketch\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassword \/ PIN entry:\u003c\/strong\u003e Security systems, door locks, and access control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePanel-mount keypad:\u003c\/strong\u003e Adhered to enclosure panel for finished product appearance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumeric input:\u003c\/strong\u003e Calculator, data entry, and parameter setting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMenu navigation:\u003c\/strong\u003e 16-key navigation for LCD menu systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 4×4 membrane keypad with 8-pin ribbon cable connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFlexible, thin, adhesive-backed 16-key membrane keypad — Arduino Keypad.h compatible for password entry, panel mounting, and numeric input projects.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45683775078635,"sku":"","price":5.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/Membrane-Keypad-4-x-4.jpg?v=1723004997","url":"https:\/\/keszoox.com\/products\/4x4-membrane-keypad-matrix-16-key-8pin-arduino","provider":"Keszoox","version":"1.0","type":"link"}