Adding Machine

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8-Car Adder

If you build it, they will sum.

ASSIGNMENT
Build a binary adding machine. First place all the necessary component parts in their respective slots. The dark square, you should assume, represents a box for Carry Ins. It fits in the slots labelled SUM. The longer dark rectangle represents a box for Carry Outs. It fits in the slots labelled CARRY. The colored circles represent light emitting diodes—tiny light bulbs that represent the output from the carry boxes. They turn OFF when 0, and ON when 1. The Green and Blue bulbs turn on when clicked. They are the A and B inputs. The Red and Yellow turn on when there is output from the sum and carry boxes. Build your machine by dragging components from the box below to the slots above. Then add with it. If your sum is over 255, however, beware of what is called overflow.

After you assemble all the bulbs and boxes, enter your age using only 0's and 1's on the green row A. Enter the number 20 using only 0's and 1's on the blue row B. (Some students complain that they age 20 years taking this course. I prefer saying that you mature 20.) The red bulbs show the sum of the green and blue rows. Send me a snapshot of this sum and receive 5 easy points. Before you start this assignment, review your binary lab.

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Last Modified 12/9/08 2:02 PM