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4x4 薄膜矩陣鍵盤
$ 22.0 元

Membrane 3x4 Matrix Keypad + extras
售價 : NT$ 180.0 元
製造商 :
適用運送方式 : 7-11取貨付款,7-11純取貨,郵寄(單一運費),貨運,宅配,貨到付款,7
出貨時程: 【預購】下單後訂貨,交期約4~10個工作天,恕不退貨,敬請見諒。   

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產品上架時間 2016 六月 24 週五.

Punch in your secret key into this numeric matrix keypad. This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.

We include a 7-pin extra-long header strip so you can plug this into a breadboard with ease.



    • Weight: 7.5 grams
    • Keypad dimensions: 70mm x 77mm x 1mm (2.75" x 3" x 0.035")
    • Length of cable + connector: 85mm
    • 7-pin 0.1" pitch connector

There is a very nice Matrix Keypad Arduino library that works great with this item. The only thing we suggest is to change the initialization code in the examples to this:

#include "Arduino.h"
#include "Keypad.h"

const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns
char keys[ROWS][COLS] = {
byte rowPins[ROWS] = {8, 7, 6, 5}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {4, 3, 2}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

This will swap the * and # keys and also let you connect to the Arduino to match this image


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