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Komplemet binary 1 can be obtained by replacing all the bits 0 to 1, or bits 1 to 0.

Example:

Determine komplement 1 of the binary number 1001010

Answer:

Binary number                 1001010

Komplement binary 1    0110101

2.  komplement 2

Komponent 2 binary numbers can be obtained by adding 1 to the binary number komplement 1

Example:

Determine the complement 2 of the binary number 1001010

Answer:

binary number                                                  1001010

complement binary numbers 1                      0110101

                                                                                          +1

 complement binary number 2                       0110110

B.      Bilangan Binary coded decimal (BCD)

BCD numbers reveal that each decimal as a nibble. Nibble is a string of 4 bits. This code allows you to display the numeric from digits 0 angkah sapai 9 as a digital clock or voltmeter.

Example 1:

Determine the number of decimal BCD 2954

Answer:

                Decimal               2        9           5         4

               BCD                    0010  1001  0101   0100

Example 2:

Determine the decimal numbers of BCD number 101001110010111

Answer:

                BCD                        0101 0011 1001 0111

                Decimal                   5       3       9       7

C.      Kode Gray

Gray codes are usually on mechanical encoder. For example, in the telegraph

1.Konversi binary to gray code

         There are several steps to convert binary numbers into gray

a) Write down the binary number

b) is the MSB MSB binary gray code

c) Sum (using module2) the first bit binary numbers with two bits, the result is the second bit gray code

d) Repeat step c for the next bit

Example 1:

Change your code into its binary number 1001001 gray

Answer:

    Binary      Gray                      Description

   1001001

   1001001   1                              MSB MSB Binary Gray = 1

   1001001   11                           1 modulo2 0 = 1

   1001001   110                         0 Modulo2 0 = 0

   1001001   1101                       0 modulo2 1 = 1

   1001001   11011                    1 modulo2 0 = 1               

   1001001   110110                  0 Modulo2 0 = 0

   1001001   1101101               1 modulo2 0 = 1

So, a binary number is 1001001 of the  gray code is 1101101 

2.Konversi gray to binary code

There are several steps to convert gray code to binary code:

a) Write down the binary number

b) is the MSB MSB binary gray code

c) Sum (using module2) the first bit number of gray with the second bit binary numbers, the result is a two-bit binary number

d) Repeat step c for the next bit

Example:

Turn gray code into a binary number 1101101

Answer:

      Gray                       Binary                   Description

    1101101

    1101101 1                              MSB MSB Binary Gray = 1

    1101101 10                           1 module2 1 = 0

    1101101 100                         0 module2 0 = 0

    1101101 1001                       0 module2 1 = 1

    1101101  10010                    1 module2  1 = 0

    1101101 100100 0 Module2 0 = 0

    1101101 1001001                0 Module2 1 = 1

So, the gray code is 1101101 of a binary number is 1001001

D.     Excess-3 d.Kode

Excess-3 code is obtained by adding up the decimal values 3, then the change into a binary number.

Excess-3             Decimal                Binary

      0                        0000                  0011

      1                        0001                 0100

      2                        0011                 0101

      3                        0100                 0110

E.      ASCII e.Kode

Code ASCII (American Standard Code For Information Interchange), published by the American national standardization institutions. ASCII code expressed in binary bits. In addition to numbers and letters, this code also displays control characters such as EOF (end of file) as a sign akhit files and EOL (end of line) as a sign of the end of the line. This code is the most widely used in information exchange. Seven-bit ASCII code will produce 128 different combinations.