Membrane Keypad 4X4

  • Product Code: MEM-4X4-BR
  • Stock

    Warehouse Stock Status Location
    Centurion Out Of Stock X269
    Stellenbosch Out Of Stock B61
  • R39.00 (price excl. VAT)


Membrane Matrix Keypad With The Raspberry Pi Video Tutorial

This 16-button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of applications. Approximate size: 69 x 77mm. It's made of a thin, flexible membrane material with an adhesive backing so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.

Quick Spec

  • Maximum Rating: 24 VDC, 30 mA
  • Interface: 8-pin access to 4x4 matrix
  • Operating temperature: 0 to 50°C
  • Dimensions Keypad: 69 x 76mm
  • Dimensions Cable: 20 x 88mm

Internal Connections

MEM_4_X4_BR_006

Alternative Method to read Keypad via Analog Pin

If your IO pins on you Arduino is limited, this method below use a resistor network and each switch pressed has a unique analog voltage

Resistor values

  • a = 15k
  • b = 1.5k
  • c = 1.5k
  • d = 15k
  • e = 4.7kΩ
  • f = 4.7kΩ
  • g = 2.2kΩ
MEM_4_X4_BR_007

Resources

Application circuit and code example

Below is a simple Arduino Application circuit


Step 1 - Download keypadmaster.zip from Github and import into Arduino ide

MEM_4_X4_BR_P01

Shipping List

  • 1 x 16-Key Membrane Switch Keypad


Tags: 16, key, membrane switches, switch, keypad, red, blue

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