BCD to 7 segment display

[ParulJ]

How can we display digit 8 using HFE4511bp decoder, if we are using only 3 input pins and 4th input pin is being used for something else

 

[Harald Kapp]

The truth table on page 4 in this datasheet tells you every input/output combination. There are two sets of input data that generate an "8" at the output.

 

[AnalogKid]

I had a longer response, and erased it. As above, read the datasheet.

ak

 

[hevans1944]

How can we display digit 8 using HFE4511bp decoder, if we are using only 3 input pins and 4th input pin is being used for something else

Oh, really? And for what, pray tell, is the fourth input pin being used?

[Mod edit: answer deleted - homework!]

 

[AnalogKid]

[Mod edit: Quote containing answer deleted]
Note that the idea was to get him to figure that out for himself.

ak

 

[Harald Kapp]

Oh, really? And for what, pray tell, is the fourth input pin being used?

Possibly a purely theoretical question to test the op's understanding of a datasheet?

 

[AnalogKid]

Indeed, a nice trick question.

 

[hevans1944]

Oops! I didn't notice this question was in the Homework Forum. My bad. The reply that @Harald Kapp made in his post #2 says all that needs to be said. I will ask no more "trick" questions. Moderator, please close this thread.

 

[Harald Kapp]

My bad

You're welcome. S* happens

Moderator, please close this thread.

Why should we? Maybe the op needs a bit more help?

 

[hevans1944]

Maybe the op needs a bit more help?

That's probably true, but given that there has been no reply, no dialog established, nor any further questions asked by the op, I would flag this as a "drive-by" poster who is not interested in learning how to read a datasheet but just wants someone to provide a quick and painless answer to their homework problem.

 

[Harald Kapp]

just wants someone to provide a quick and painless answer to their homework problem.

I'm afraid you are right.