1. /// 0111 0011 1011 1001 1101 1100 1110 0110 // input format
2.	
3. int in1 = 8;
4. int in2 = 9;
5. int in3 = 10;
6. int in4 = 11;
7.	
8. int i = 0;
9. int freq = 200;
10.       unsigned long t_half =0.5*(1000000/freq);
11.	
12.	
13.       void setup()
14.       {
15.         pinMode(in1, OUTPUT);
16.         pinMode(in2, OUTPUT);
17.         pinMode(in3, OUTPUT);
18.         pinMode(in4, OUTPUT);
19.       }
20.	
21.       void loop() {
22.         delayMicroseconds(t_half);
23.         i=i+1;
24.         if (i >=8)  {i=0;}
25.        switch(i)
26.        {
27.         case 0:
28.           digitalWrite(in1,LOW);
29.           digitalWrite(in3,HIGH);
30.           digitalWrite(in2,HIGH);
31.           digitalWrite(in4,HIGH);
32.         break;
33.         case 1:
34.           digitalWrite(in1,LOW);
35.           digitalWrite(in3,LOW);
36.           digitalWrite(in2,HIGH);
37.           digitalWrite(in4,HIGH);
38.         break;
39.         case 2:
40.           digitalWrite(in1,HIGH);
41.           digitalWrite(in3,LOW);
42.           digitalWrite(in2,HIGH);
43.           digitalWrite(in4,HIGH);
44.         break;
45.         case 3:
46.           digitalWrite(in1,HIGH);
47.           digitalWrite(in3,LOW);
48.           digitalWrite(in2,LOW);
49.           digitalWrite(in4,HIGH);
50.         break;
51.         case 4:
52.           digitalWrite(in1,HIGH);
53.           digitalWrite(in3,HIGH);
54.           digitalWrite(in2,LOW);
55.           digitalWrite(in4,HIGH);
56.         break;
57.         case 5:
58.           digitalWrite(in1,HIGH);
59.           digitalWrite(in3,HIGH);
60.           digitalWrite(in2,LOW);
61.           digitalWrite(in4,LOW);
62.         break;
63.         case 6:
64.           digitalWrite(in1,HIGH);
65.           digitalWrite(in3,HIGH);
66.           digitalWrite(in2,HIGH);
67.           digitalWrite(in4,LOW);
68.         break;
69.         case 7:
70.           digitalWrite(in1,LOW);
71.           digitalWrite(in3,HIGH);
72.           digitalWrite(in2,HIGH);
73.           digitalWrite(in4,LOW);
74.         break;
75.         }
76.       }