7-Segment Readout
1. By using the four binary switches make the 7-segment readout
display numbers 1 through 9.
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.
3. Compare the chart made in question 2 to the one shown here provided
by the maker of the decoder.
( I made a chart of the display and I compared with the chart in the
book. All the numbers were correct.)
4. Use the logic probe 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 fore this input? 7 low, 1 high,
2 high, 6 low. Now check the outputs. They are: 13 high, 12 high, 11
high, 10 low, 9 low, 15 low, 14 low.
