KeyPad 3x4 12 Keyboard Matrix Membrane Switch Keypad Super Slim
The KeyPad 3x4 12-Key Matrix Membrane Switch Keypad is a compact and durable input device designed for electronic projects and embedded systems. It features a 4×3 matrix layout with 12 clearly labeled tactile keys, making it ideal for numeric and control input applications. Built with a flexible membrane structure and self-adhesive backing, it allows easy installation on various surfaces. The keypad operates at 3–5V DC and uses a standard 7-pin 2.54mm connector, making it fully compatible with Arduino, Raspberry Pi, and other microcontrollers. With high durability and a long key life, it is suitable for security systems, automation, and industrial control interfaces.
لوحة المفاتيح 3×4 ذات 12 زرًا بنظام المصفوفة هي وحدة إدخال صغيرة وعملية تستخدم في المشاريع الإلكترونية والأنظمة المدمجة. تتميز بتصميم 4 صفوف × 3 أعمدة مع مفاتيح واضحة وسهلة الاستخدام. تأتي بتصميم غشائي مرن مع طبقة لاصقة لتسهيل التثبيت على الأسطح المختلفة. تعمل بجهد 3–5 فولت وتستخدم موصل قياسي ذو 7 أطراف بمسافة 2.54 مم مما يجعلها متوافقة مع Arduino وRaspberry Pi. تتميز بعمر افتراضي طويل ومتانة عالية، مما يجعلها مناسبة لأنظمة الحماية والأتمتة والتطبيقات الصناعية.
The 3x4 12-Key Matrix Membrane Keypad is a reliable and compact input interface designed for microcontroller-based systems. It uses a matrix scanning structure (4 rows × 3 columns) that reduces the number of GPIO pins required for operation, making it efficient for embedded designs.
The keypad is built from a flexible membrane material with a durable adhesive backing, allowing it to be easily mounted on panels, enclosures, or control boxes. Each key is clearly labeled and designed for high tactile feedback and long-term durability, supporting over 1 million presses per key.
It operates at low voltage (3–5V DC) and connects via a standard 7-pin female header with 2.54mm pitch, ensuring wide compatibility with development boards such as Arduino, Raspberry Pi, and PIC/AVR systems.
This keypad is widely used in security systems, access control panels, vending machines, and DIY electronics projects due to its simplicity, reliability, and ease of integration.
Specifications
| Parameter | Value |
|---|---|
| Number of Keys | 12 |
| Layout | 4 Rows × 3 Columns |
| Operating Voltage | 3–5 VDC |
| Operating Current | 100 mA |
| Contact Resistance | ≤ 500 Ω |
| Insulation Resistance | ≥ 100 MΩ |
| Dielectric Strength | 250 Vrms |
| Connector Type | Female Header |
| Pin Count | 7 Pins |
| Pin Pitch | 2.54 mm |
| Cable Length | 70 mm |
| Dimensions | 76 mm × 69 mm |
| Material | Flexible membrane with adhesive backing |
| Operating Temperature | -40°C to 85°C |
| Humidity Range | 40% – 80% RH (non-condensing) |
| Key Lifetime | > 1,000,000 presses |
Applications
- Security and alarm systems
- Arduino and microcontroller projects
- Home automation systems
- Industrial control panels
- Vending machines and kiosks
- Access control systems
- DIY electronics and robotics