งานปฎิบัติ 7
 
 งาน ปฎิบัติ 7                  Key Pad    wiring diagram           Cod 1     #include "LedControl.h"   #include "Keypad.h"   char keys[4][4]={     {'7','8','9','A'},     {'4','5','6','B'},     {'1','2','3','C'},     {'E','0','F','D'}};   byte rowPins[] = {7,6,5,4};   byte colPins[] = {3,2,1,0};   Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,4,4);   LedControl lc=LedControl(8,10,9,1);    // Pin 8->DIN, 10->CLK, 9->CS(LOAD), 1 = No.of devices   void setup()    {     lc.shutdown(0,false);       lc.setIntensity(0,5);      lc.clearDisplay(0);         }   void loop()    {     char key = keypad.getKey();     if (key != NO_KEY)     {       lc.setChar(0,0,key,false);     }     }    Cod 2  #include "LedControl.h"   #include "Keypad.h"   char keys[4][4]={     {'7','8','9','A'},  ...
 
