Digital Encoder is a Digital Device that uses binary number of n bit to represent a number of base ten . Binary number of n bit is called Binary Coded Decimal (BCD), a coding scheme used in digital to encode informations
If there are two control lines
A and B , we can have 4 4-bit-binary-numbers
a3a2a1a0 which can be used to represent a number of base ten from 0 to 3
| A | B | a3 a2 a1 a0 | Decimal Number |
| 0 | 0 | 0 0 0 0 | 0 |
| 0 | 1 | 0 0 0 1 | 1 |
| 1 | 0 | 0 0 1 0 | 2 |
| 1 | 1 | 0 0 1 1 | 3 |
Binary Coded Decimal - BCDn order to encode decimal number from 0 - 9 using Binary Coded Decimal Scheme , 10 4-bit-Binary-numbers are used -
| A | B | a3210 a a a | Decimal Number | | 0 | 0 | 0 0 0 0 | 0 | | 0 | 1 | 0 0 0 1 | 1 | | 1 | 0 | 0 0 1 0 | 2 | | 1 | 1 | 0 0 1 1 | 3 | | 1 | 1 | 0 1 0 0 | 4 | | 1 | 1 | 0 1 0 1 | 5 | | 1 | 1 | 0 1 1 0 | 6 | | 1 | 1 | 0 1 1 1 | 7 | | 1 | 1 | 1 0 0 0 | 8 | | 1 | 1 | 1 0 0 1 | 9 |
ASCIIASCII , America Coding Information Interchange , is a coding scheme used in Noth America to encode informations using 7-bit-binary-numbers . | a6 | a5 | a4 | a3 | a2 | a1 | a0 | Information | | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a | | 0 | 0 | 0 | 0 | 0 | 0 | 1 | b | | 0 | 0 | 0 | 0 | 1 | 1 | 1 | c |
|
| | 0 | 0 | 0 | 0 | 1 | 0 | 0 | d | | 0 | 0 | 0 | 0 | 1 | 0 | 1 | e | | 0 | 0 | 0 | 0 | 1 | 1 | 0 | f | | 0 | 0 | 0 | 0 | 1 | 1 | 1 | g |
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