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.

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  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.

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  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).

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  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).

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  Package Includes:

  • 1x 3×4 Matrix Keypad (12 Keys).

  • 1x 8-pin DuPont cable (female-to-female).

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  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.