2 digit 7 segment display counter

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useless018

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hello to everyone,,,

i have a problem in designing the pcb layout of a 2 digit 7segment display counter using 74LS47 and 74LS192 IC's,,,,,,
can anyone help in designing it's pcb layout,,,,,,,
thank you very much ^_^
 

What kind of problem do you have?
 

@useless018
First you need to decide what type of 7 segments LEDs display available for the project: two pieces single digit or one piece double digit. Later check LEDs displays pinout in the datasheet. :grin:
 

One example of the PCB:
 

Attachments

  • PCB test1.GIF
    106.7 KB · Views: 149
  • PCB test 2.GIF
    70.3 KB · Views: 103
...the schematics for the PCB:
 

Attachments

  • Counter test.GIF
    15.2 KB · Views: 112
Maybe we need to improve the actual diagram.
We may add some decoupling capacitors, automatically reset at POWER ON and jumpers to connect external RESET button.
. See the new version here:
 

Attachments

  • counter v3all.GIF
    69.6 KB · Views: 122
  • Counter v3t.GIF
    28.6 KB · Views: 102
  • Counter v3x.GIF
    69.2 KB · Views: 91
  • Counter v3a.GIF
    69.2 KB · Views: 104
  • counter_v3 sch.GIF
    24.4 KB · Views: 110
thank you mister rf ,,,
the 7 segment display that im going to use is 2 pieces of one digit 7 seg.display common anode,,,
and its pin configuration looks like this,,,
 

OK. :grin: The new PCB:
 

Attachments

  • C_all.GIF
    66.1 KB · Views: 103
  • C_Top.GIF
    30.6 KB · Views: 95
  • C_Bottom.GIF
    76.1 KB · Views: 101
thank you very much mister_rf your pcb layout have help me alot ^_^,,,,,,

---------- Post added at 14:31 ---------- Previous post was at 13:31 ----------

thank you very much mister_rf,,,,, but my professor have instructed us to have a four input i dont remember it but as far as i remembered it is for the carry, borrow and reset i forgot the other one,, but i will ask him tommorow,,,,, so there will be some modifications in the pcb layout that you gave me,,,,,, thank you very much for the help,,, so by tommorow i will clearly tell all the specification that my professor gave me,,, thank you very much again mister_rf,,,,,,
 

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