Why Won't My 7 Segment BCD Display Light Up in Multisim?

  • Thread starter Thread starter dbeckfor
  • Start date Start date
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
3 replies · 9K views
dbeckfor
Messages
2
Reaction score
0
I can not figure out how to get my 7 segment BCD display to turn on in Multisim. I am using the 74LS48N Decoder and the Common Cathode 7 Segment Display. I have attached a view for it,its a little messy.
 

Attachments

  • BCD Issue.gif
    BCD Issue.gif
    100.9 KB · Views: 1,985

Discussion

Engineering news on Phys.org
dbeckfor said:
I can not figure out how to get my 7 segment BCD display to turn on in Multisim. I am using the 74LS48N Decoder and the Common Cathode 7 Segment Display. I have attached a view for it,its a little messy.

What do you see when you monitor the currents in various parts of the LED drive circuit?
 
berkeman said:
What do you see when you monitor the currents in various parts of the LED drive circuit?

I get 3.32 pA and 3.32 mV
 
dbeckfor said:
I get 3.32 pA and 3.32 mV

Well, pA will not light an LED. Are the signals going into your LED driver correct? That's the advantage of a simulator (or an oscilloscope on a circuit) -- trace the signals out...
 

Similar threads

Why is my 7 segment display not working in Multisim?

  • lissette
  • · Replies 10 ·
  • Electrical Engineering
Replies
10

Engineering What Could Be Preventing My 7 Segment Circuit from Running in Multisim?

  • tqcenter2002
  • · Replies 3 ·
  • Engineering and Comp Sci Homework Help
Replies
3

How can I get a seven segment display to light up in my circuit?

  • Tom McCurdy
  • · Replies 6 ·
  • Electrical Engineering
Replies
6

High School Why won't my LEDs light up with 9V and 60 Ohm resistance?

  • John Readman
  • · Replies 1 ·
  • Electromagnetism
Replies
1