4 Bit Bcd Input To 7 Segments Displays?

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thanosgen

New Member

• Jan 14, 2007

• #1

Be drawn and materialise in rasters a reasonable circuit that would appear in 7 seagments displays sectors the digits of hex system of numeration. the numbers that i want to see will be appearred as in the following form:


6 A B C D E F

Code the digits it will be given as BCD with Dip-switch

CAN HELP ME ΟR IS DIFFICULT?????

p.m. with multiplexter can i do it??????

i need something like this
**broken link removed**

i give the 1111 and i want to see the F etc

 

mramos1

Active Member

• Jan 14, 2007

• #2

If I understand you correctly. It can be done with a microcontroller. You read the 4 pin dip switch and use a lookup table to get the value to write to the 7 segment display (and the DOT too if you need that.).

 

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ljcox

Well-Known Member

• Jan 14, 2007

• #3

I looked at a few 7 segment decoders but none had the Hex outputs.

However, you could do it by using a 7 segment decoder (preferably one with open collector or open drain outputs) and do the A ~ F outputs with gates.

Also, it is not BCD, it is 4 digit binary. BCD implies 0 ~ 9.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Jan 14, 2007

• #4

I would suggest you pay attention in class, and don't ask others to do your work for you!.

 

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thanosgen

New Member

• Jan 15, 2007

• #5

ljcox can you help me to do this with gates?i need one idea to begin my work.

 

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thanosgen

New Member

• Jan 15, 2007

• #6

i need something like this
but in 16 display led(A B C D E F)

 

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thanosgen

New Member

• Jan 15, 2007

• #7

nothing??????????????????????????????

 

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ljcox

Well-Known Member

• Jan 15, 2007

• #8

thanosgen said:

ljcox can you help me to do this with gates?i need one idea to begin my work.

Click to expand...

Yes I will. I'll post some suggestions later

 

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ljcox

Well-Known Member

• Jan 15, 2007

• #9

Here is the gating for the "a" segment. You will need to draw Karnaugh maps for each of the remaining segments.

As you can see it will require a fair number og gates to do gating for all segments.

However, you may find some commonality that can reduce the overall number of gates.

It would be much simpler to use a PIC.

 

Attachments

• A ~ F decoding.gif

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thanosgen

New Member

• Jan 16, 2007

• #10

i need very much gates to do this.anyway thanks....