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see How To Test
input 1 - clock input input 2 - feed NOT LED 1 back into the shift register – this creates a pattern where every other LED is switched on input 3 - feed 1 into the shift register if both the first two LEDs are off. This creates a pattern where every third LED is on input 4 - feed 1 into the shift register if the first three LEDs are off. This creates a pattern where every fourth LED is on input 5 - feed 1 into the shift register if all the LEDs are off. This creates a pattern of one light scanning across the LEDs input 6 - set the direction of the shift register input 7 - toggles fixed direction or alternating direction. If alternating direction is set, the direction of the shift register will flip if all the LEDs are off input 8 - enable the clock divider
| # | Input | Output |
|---|---|---|
| 0 | clock | LED1 |
| 1 | not_1 | LED2 |
| 2 | not_1_2 | LED3 |
| 3 | not_1_2_3 | LED4 |
| 4 | not_all | LED5 |
| 5 | direction | LED6 |
| 6 | toggle_direction | LED7 |
| 7 | clock_div_enable | LED8 |