Hey there!
This is my first post so please bare with me.sing
I'm currently working on building a 7 segment display circuit using 2 6 position DIP switches to a 4 bit adder (7483), to a 7 segment decoder (7447), then through an inverter chip (7404) then finally to my 7 Segment Display (common cathode---hence the inverters).
My problem is, when I add up different binary nibbles I can only get full displays for the numbers 7 8 and 9
Looking at the attached thumbnail my issues are:
0 is missing "f"
1 is missing "b,c" (it doesn't show up at all)
2 is missing "g,b"
3 is missing "g"
4 is missing "b,c"
5 is missing "c,a"
6 is missing "a,c"
As I said 7,8 and 9 are fine.
My issue is, I have checked my wires like a thousand times, they are fairly neat and I can't understand how a number like 8 can show up (all the LED's are lit) and 1 can't. Even if there was a wire out of place, wouldn't it effect both numbers? Same thing with bent pins etc etc.
I'm at a loss for ideas, I would appreciate your help
Thank you
This is my first post so please bare with me.sing
I'm currently working on building a 7 segment display circuit using 2 6 position DIP switches to a 4 bit adder (7483), to a 7 segment decoder (7447), then through an inverter chip (7404) then finally to my 7 Segment Display (common cathode---hence the inverters).
My problem is, when I add up different binary nibbles I can only get full displays for the numbers 7 8 and 9
Looking at the attached thumbnail my issues are:
0 is missing "f"
1 is missing "b,c" (it doesn't show up at all)
2 is missing "g,b"
3 is missing "g"
4 is missing "b,c"
5 is missing "c,a"
6 is missing "a,c"
As I said 7,8 and 9 are fine.
My issue is, I have checked my wires like a thousand times, they are fairly neat and I can't understand how a number like 8 can show up (all the LED's are lit) and 1 can't. Even if there was a wire out of place, wouldn't it effect both numbers? Same thing with bent pins etc etc.
I'm at a loss for ideas, I would appreciate your help
Thank you
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