
This is a simple 4 Bit Adder.
Connect Buttons (or Dip Switches) to the inputs. 0 to 3 are for the first number, and 4 to 7 for the second number. Connect LEDs to the outputs.
8 buttons and 8 leds
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | A0 | LED0 | |
| 1 | A1 | LED1 | |
| 2 | A2 | LED2 | |
| 3 | A3 | LED3 | |
| 4 | B0 | LED4 | |
| 5 | B1 | ||
| 6 | B2 | ||
| 7 | B3 |