5 x 4 Key Matrix Keypad With Adhesive

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41.72 41.72 ZAR 49.08 VAT Included

42.68 VAT Included

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Development Module Prototyping CPU ESP

Internal Reference: ACC-019



Membrane keypads are an excellent starting point for adding key input to a project because they are inexpensive, long-lasting, and resistant to water. And knowing how to interface them with an Arduino is extremely useful for building a variety of projects that require user input for menu selection, password entry, or robot operation.

Graphic Overlay – Graphic overlays are typically made of polyester because it has better flex life than polycarbonate.

Metal Domes – This layer houses metal domes or polydomes that provide tactile feedback.

Top Circuit Layer – This is typically a polyester printed layer with silver-filled electrically conductive inks. This layer terminates as a flexible tail that connects to the outside world.

Spacer – This layer separates the top and bottom circuits, allowing the switch to remain normally open until the keypad is pressed.

Bottom Circuit Layer – This is typically a polyester printed layer with silver-filled electrically conductive inks. This layer also terminates as a flexible tail.

Rear Adhesive Layer – This layer sticks the keypad to almost anything, which is convenient.

 

Matrix Membrane Keypad Specs:

  • Circuit level: 35V DC, 100mA, 1W
  • Standard square resistance: <=50mQ/mil
  • Contact resistance: 10-500Q (with lead length and material variation)
  • Insulation resistance: 100MΩ 100V
  • Dielectric withstand voltage: 250VRms (50-60Hz 1min)
  • Contact jitter time: <=5ms
  • Operating pressure Metal shrapnel type: 220-350g
  • Switching stroke Metal dome-type: 0.6-0.8mm
  • Storage temperature: -0°C~+60°C16H
  • Storage humidity: 70%-90%
  • Test humidity: 70%-90%
  • vibration: 20G's msx. (10-200HZ, MIL-202, M204, Condition B)
  • Line thickness: <=0.13mm