Procedure The copper circuit board is made according to the layout in previous section. Cut a piece of acrylic board with the same shape, four holes with appropriate size are drilled on both the copper board and acrylic board for the screws to go through. In this intersction simulator, a time counter is added to both traffic ways. The counter starts at 10 seconds before the light shows up and the number appears at the beginning of the last 5 seconds. Unlike the previous intersection project, the parts are welded directly onto the copper board. ** In this project, unfortunately the acrylic board is missing. Also, because of the defective design of the layout, the over use of jump wires made it impossible to fit all the parts onto the board and work properly. Activity 5. Problems 1.14~1.18 p.32~33 1.14 a) b) 1111 1111 1111 1111 - 0000 0000 Base - 1000 0000 Base 1111 1111 1’s complement 0111 1111 1’s complement + 1 + 1 0000 0000 2’s complement 1000 0000 2’s complement c) d) 1111 1111 1111 1111 - 0111 0110 Base - 1101 1010 Base 0010 0101 1’s complement 1000 1001 1’s complement + 1 + 1 0010 0110 2’s complement 1000 1010 2’s complement e) f) 1111 1111 - 1000 0101 Base 0111 1010 1’s complement
Procedure The copper circuit board is made according to the layout in previous section. Cut a piece of acrylic board with the same shape, four holes with appropriate size are drilled on both the copper board and acrylic board for the screws to go through. In this intersction simulator, a time counter is added to both traffic ways. The counter starts at 10 seconds before the light shows up and the number appears at the beginning of the last 5 seconds. Unlike the previous intersection project, the parts are welded directly onto the copper board. ** In this project, unfortunately the acrylic board is missing. Also, because of the defective design of the layout, the over use of jump wires made it impossible to fit all the parts onto the board and work properly. Activity 5. Problems 1.14~1.18 p.32~33 1.14 a) b) 1111 1111 - 1000 0000 Base 0111 1111 1’s complement + 1 1000 0000 2’s complement 1111 1111 - 0000 0000 Base 1111 1111 1’s complement + 1 0000 0000 2’s complement c) d) 1111 1111 - 1101 1010 Base 0010 0101 1’s complement + 1 0010 0110 2’s complement 1111 1111 - 0111 0110 Base 1000 1001 1’s complement + 1 1000 1010 2’s complement e) f) 1111 1111 - 1000 0101 Base 0111 1010 1’s complement