Encoder & Decoder Application

Status
Not open for further replies.

he11fire

New Member
I need help to finish this circuit design...The 7-Segment Display output is wrong for every button pressed...There's a relation between button 6 and 9 outputs, because the output of Display after button 6 is pressed is 9, and when I press button 9 the output is 6...I would really appreciate any help.
**broken link removed**
 
hi,
The 74HC147 outputs are active LOW, so when I1 input is low, 'A' is LOW and B,C,D are HIGH, so the 74LS47 input is 1110, which is decoded as '14'
ie: d,e,f,g are are lit.
 

Attachments

  • 000esp02.gif
    21.4 KB · Views: 546
  • 000esp03.gif
    16.6 KB · Views: 623
Last edited:
he11fire said:
I put 9 inverters after each push button and no LED lighted ...so I think this part is ok...
Click to expand...

Do you mean its working correctly.?

EDIT:
The inverters should be on the outputs of the LS147 to the LS47 inputs.
 
Last edited:
Do you know why 6 and 9 are not shown complete ?
I mean segment D at 9 isn't activated .
And segment A at 6 isn't activated either...
 
he11fire said:
Do you know why 6 and 9 are not shown complete ?
I mean segment D at 9 isn't activated .
And segment A at 6 isn't activated either...
Click to expand...

Its the decoder LS47, see this image
 

Attachments

  • 000esp02.gif
    21.8 KB · Views: 418
Status
Not open for further replies.

Similar threads

H
about rf encoder and decoder
Replies
12
Views
3K
Nigel Goodwin
1
encoders
Replies
3
Views
2K
Ian Rogers
B
application of signals
Replies
6
Views
2K
Jugurtha
Trying to have an idea on the 3 phase system ( mainly motor application )
Replies
3
Views
2K
4pyros
C
Doubt with Encoder Binary Decimal
Replies
1
Views
2K
crf_h0m3r
C
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…