7-Segment
A seven-segment display is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays.
Seven-segment displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information
The difference between the two displays is the common cathode has all the cathodes of the 7-segments connected directly together and the common anode has all the anodes of the 7-segments connected together. Shown below is a common anode seven segment.
7-Segment symbol
7-Segment truth table
| A | B | C | D | E | F | G | 7-segment output |
|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 1 |  |
| 0 | 1 | 1 | 0 | 0 | 0 | 0 |  |
| 1 | 1 | 0 | 1 | 1 | 0 | 1 |  |
| 1 | 1 | 1 | 1 | 0 | 0 | 1 |  |
| 0 | 1 | 1 | 0 | 0 | 1 | 1 |  |
| 1 | 0 | 1 | 1 | 0 | 1 | 1 |  |
| 1 | 0 | 1 | 1 | 1 | 1 | 1 |  |
| 1 | 1 | 1 | 0 | 0 | 0 | 0 |  |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 |  |
| 1 | 1 | 1 | 1 | 0 | 1 | 1 |  |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 |  |
| 0 | 0 | 1 | 1 | 1 | 1 | 1 |  |
| 1 | 0 | 0 | 1 | 1 | 1 | 0 |  |
| 0 | 1 | 1 | 1 | 1 | 0 | 1 |  |
| 1 | 0 | 0 | 1 | 1 | 1 | 1 |  |
| 1 | 0 | 0 | 0 | 1 | 1 | 1 |  |