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งานปฏิบัติ 9 wiring diagram🔻 Code 1🔻 #include "LedControl.h" #include "Keypad.h" #define C4  262 #define D4  294 #define E4  330 #define F4  349 #define G4  392 #define A4  440 #define B4  494 #define C5  523 char keys[4][4]={   {7,8,9,0},   {4,5,6,0},   {1,2,3,0},   {0,0,0,0}}; byte rowPins[] = {7,6,5,4}; byte colPins[] = {3,2,1,0}; Keypad keypad = Keypad(makeKeymap(keys),rowPins,colPins,4,4); int melody[] = {C4,D4,E4,F4,G4,A4,B4,C5}; int dl = 300; int buzzerpin = 11; 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);   pinMode(buzzerpin,OUTPUT);   digitalWrite(buzzerpin,HIGH); } void loop()  {   char key = keypad.getKey();   if ((key != NO_KEY) && (key < 9))   {     lc.setDigit(0,0,key,false);     tone(buzzerpin, melody[ke

งานปฏิบัติที่ 8 wiring diagram🔻 Code 01🔻 #include "LedControl.h" #define C4  262 #define D4  294 #define E4  330 #define F4  349 #define G4  392 #define A4  440 #define B4  494 #define C5  523 int melody[] = {C4,D4,E4,F4,G4,A4,B4,C5}; float beats[] ={1,1,1,1,1,1,1,1}; int buzzerpin = 11; int timestop = 70; 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);   int dl = 500;   pinMode(buzzerpin,OUTPUT);   int numnote;   numnote = sizeof(melody)/2;   for (int i=0;i<numnote;i++)   {     lc.setChar(0,7-i,'-',false);     tone(buzzerpin, melody[i],dl*beats[i]);     delay(dl*beats[i]);     digitalWrite(buzzerpin,HIGH);     delay(timestop);   } } void loop() { } Code 02🔻 #include "LedControl.h" #define C4  262 #define D4  294 #define E4  330 #define F4  349 #define FS4 370 #define G4  392 #define A4  440 #def