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Welcome to the base is three universal shift register lecture and I'm going to show you how the universal

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shift British search should be implemented on your basis three board and what we have is that we have

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eight inputs which are shown from our switch to zero to switch 7 and we have two selectors which indicate

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the mode of operation for our universal shift register and there are the two left most switches at the

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bottom of your bases three board.

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And then we have a clock input and a ready set in our clock is the center button and a reset is a top

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button.

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So if we have both of our selector inputs as a one which are indicated by our two switches in the up

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position we are going to perform a parallel load.

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And what that will do is take the status of the input switches and load them onto the corresponding

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Ltds.

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So right now we have all them up as a 1.

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So if I press the middle button which is our clock you'll see that we have loaded all of the outputs

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with a one every every value in the shift register.

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So now let's go ahead and move our selector switch down so we have it as a 1 0.

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And what this will do is shift our inputs to the left.

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Every time I push the clock so I'm going to push the clock once.

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And you'll notice that all the inputs are still lit up except for the brightness output and that's indicated

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that we have shifted everything to left.

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So we have a zero there and if I press it again we'll notice that the same thing occurs except now we

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have two zeros.

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So we've tooken over outputs and shifted them to bits to the left.

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So let's flip the the selector switches so we have it as a 0 1 which we now should shift everything

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to the right.

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So when I push the clock button we should see that all of the Ltds are lit up except for the rightmost

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one and the leftmost.

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So go ahead and press the clock button and you'll notice that they're all lit up except for the two

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outside ladies.

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Now if I just keep pressing the clock but never time I press that we will keep moving the output.

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So if I press it enough times you notice that we have one I press that again we have zero.

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So I want to go ahead and parallel load again let's move both of our selector switches to one and just

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kind of change the status so he got some ones and some zeros and then let's press our clock button.

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So now we've loaded our shift register and if we want to go ahead and clear that we can just move our

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selector switches to the left or to the right and just clock all the way through.

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However if we want to do it on one clock cycle we can use our reset which we know that occurs on a clock

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cycle.

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So if I just press my reset you'll notice that nothing resets.

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Nothing actually happens.

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And that's because you reset your clock.

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Have to happen together.

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So push or reset and then push the clock button while holding down the reset.

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And that should reset our shift register.

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So let's go ahead and hold the clock and hold down the reset press the clock and you notice that all

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the ladies have been cleared out.

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And that is how the universal shift register should work on your bases through board.