Project #4: 7 Segment Readout
A skitch of my answers to #2 and #4 and two photos of my wiring.
Part 1:
1. Here are the following switches needed to form the numbers below:
#2: 1, 2, 4, 5, 7
#3: 1, 2, 3, 4, 7
#4: 2, 3, 6, 7
#5: 1, 3, 4, 6, 7
#6: 1, 3, 4, 5, 6, 7
#7: 1, 2, 3
#8: 1,2 ,3, 4, 5, 6, 7
#9: 1, 2, 5, 6, 9
Part 2:
1. By using the four binary switches, make the 7-segment readout display numbers 1 through 8.
2. If any binary number above 9 is made by the switches, what happens to the 7-segment display? Make a chart of how the display looks for each binary number from 10 to 15.
4. Use the logic probes made earlier to determine the logic state (high or low) of the inputs and outputs of the 7448 decoder. Set the input switches to binary “7”- use the logic probe to observe the states of pins 7, 1, 2, and 6. What should they be for this input? Then, check the outputs, which are 13, 12, 11, 10, 9, 15, and 14.
Any questions?
