38 Single Digit Sums by Mark Angelov
38 : Single Digit Sums by Mark Angelov
- Author: Mark Angelov
- Description: This project displays the one-digit sums created by the possible number inputs.
- GitHub repository
- Open in 3D viewer
- View in Wokwi
- Clock: 0 Hz
How it works
Turn a switch on to add to the total, which would then be displayed on the 7-segment display. Sums can only have a total of one digit; for example, switching 0 and 7 on will output 9, while switching 1 and 7 on will output nothing because it makes 10, which is not a single-digit sum.
How to test
Set the inputs to add to a number from 0-9 and check if the output shows the correct number.
External hardware
Requires a single 7-segment display.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | adds 1 to the sum | top segment of the display | |
| 1 | adds 2 to the sum | right top segment of the display | |
| 2 | adds 3 to the sum | right bottom segment of the display | |
| 3 | adds 4 to the sum | bottom segment of the display | |
| 4 | adds 5 to the sum | left bottom segment of the display | |
| 5 | adds 6 to the sum | left top segment of the display | |
| 6 | adds 7 to the sum | middle segment of the display | |
| 7 | adds 8 to the sum | dot segment of the display |