Digital Electronics: Opposite Logic Output

[Ores]

I'm a High School student and my school has a mandatory Digital Electronics course. We have a project due on Tuesday where we have breadboard a circuit to display our 9-digit school ID number on a Common Cathode LED. We first have to plan out and submit the circuit in Multisim. I assume I wired the switches correctly and rechecked my truth table and K-maps multiple times but certain segments on the LED are off when they should be on and vice versa. My teacher checked everyone's k-map and mine didn't have any errors. Can anyone tell me what I did wrong.

Here's the link to the file with the A-Segment wired:A-Seg

Here's the truth table and KMap:

Spoiler

Spoiler

[johnsold]

You have at least one error in converting your truth table to K-map.  The row marked 6 in the truth table has a = 1 and ABCD = 0110. In the K-map A'B x CD' is 0.  Similarly row 7 is wrong. I did not check any further.

Lynn

[Ores]

Isn't A'BCD' 1001?

[digitalguy]

A'BCD'=0110

[cutesue]

i have a question.

Please design a counter that counts the number of times the
number “5” appears in an 4-bit input stream. The I/O are as follows:
NumberIn : 4-bits wide (input)
Start: Reset counter and overflow flag to zero while start is high (input)
Count: 8-bit unsigned count (of the number of “5”s that have occurred since start went
low (output)
Overflow: Goes high if count overflows (count is unsigned, so you only need to monitor
the adder carry out) and stays high until start is re-asserted.

[johnsold]

This sounds like a school exercise.  This Forum is not a place to have someone else do your work.

It also has nothing to do with the original topic in this thread.  You should start a new thread.

You did not ask a question. What have you tried? What does not work about what you tried? What other constraints do you have? What type of logic or circuitry will you use for this design?  How will you test it?

Lynn