MCU Standard keyboard Matrix Keypad 12 Key (3×4)
90.00 EGP
This 3×4 matrix keypad features 12 tactile membrane switches arranged in a row-column grid, providing a compact and efficient input solution for microcontroller projects (Arduino, Raspberry Pi, ESP32). Ideal for access control, menu navigation, and DIY electronics.
Description
-
Key Features:
✔ 3×4 Matrix Layout – 12 keys (0-9, *, #) arranged in 3 rows × 4 columns for efficient GPIO usage.
✔ Tactile Membrane Switches – Soft press with clear feedback (100,000+ cycles lifespan).
✔ Low-Power & Debounced – Clean signal output, suitable for 5V/3.3V MCUs.
✔ Pre-Wired Cable – Includes 8-pin DuPont connector (compatible with breadboards).
✔ Compact & Durable – Polyester overlay resists moisture and dust.
Applications:
-
Security Systems – PIN code entry for door locks.
-
Menu Interfaces – Navigate LCD/OLED displays.
-
Industrial Control – Keypad for machinery input.
-
DIY Macro Keypad – Custom shortcuts for PCs.
Technical Specifications:
-
Voltage: 1–12V DC (logic-level safe).
-
Current: <5mA per key press.
-
Contact Resistance: <100Ω.
-
Size: 80mm × 70mm × 2mm (active area).
-
Cable Length: 15cm (6 inches).
Wiring (Matrix Scan Method):
-
Rows (R1-R3) → MCU output pins (set HIGH one at a time).
-
Columns (C1-C4) → MCU input pins (pulled LOW, detect HIGH when key pressed).
Package Includes:
-
1x 3×4 Matrix Keypad (12 Keys).
-
1x 8-pin DuPont cable (female-to-female).
Why Choose This Keypad?
✅ Saves GPIO Pins – Uses 7 pins instead of 12 (vs. direct wiring).
✅ Plug-and-Play – Works with Arduino Keypad library.
✅ Customizable Overlay – Label keys with stickers or laser engraving. -
Reviews
There are no reviews yet.