Sum code
| Decimal digit |
Sum coded |
Binary coded |
|---|---|---|
| 0 | 000000000 | 0 0 0 0 |
| 1 | 000000001 | 0 0 0 1 |
| 2 | 000000011 | 0 0 1 0 |
| 3 | 000000111 | 0 0 1 1 |
| 4th | 000001111 | 0 1 0 0 |
| 5 | 000011111 | 0 1 0 1 |
| 6th | 000111111 | 0 1 1 0 |
| 7th | 001111111 | 0 1 1 1 |
| 8th | 011111111 | 1 0 0 0 |
| 9 | 111111111 | 1 0 0 1 |
The sum code is a binary code in which the value is expressed by the number of 1 values. The sum of the 1 values therefore gives the value of the number described. The sum code is only used very rarely; the related 1-out-of-n code is more common . One application example is the use to control the lighting of an electronic VU meter , for example for a light organ .