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Binary to BCD

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UmarFD

New Member
Im finding it hard to belive that the only way to convert a binary number to BCD is using a microcontroller.

I am currently building a digital tachometer and the problem I am faced with is that I dont know how to display my 12 bit binary number on four seven segment displays.

I need a solution not involving a microprocessor.

Thanks.
 

UmarFD

New Member
Thanks

Im just surprised. I thought definatly their would be a IC that was cascadeable to take any binary number to a few BCD results.

Guess they still gotta make it :D
 

crutschow

Well-Known Member
Most Helpful Member
There is an obsolete IC that converted binary to BCD which used some sort of ROM lookup table I believe. But it apparently didn't sell very well so they stopped making it.:( Apparently most just us a microprocessor for that task.
 

kpatz

New Member
There is an obsolete IC that converted binary to BCD which used some sort of ROM lookup table I believe. But it apparently didn't sell very well so they stopped making it.:( Apparently most just us a microprocessor for that task.
So use some EPROMs then. :) A microcontroller is much easier to do it with. Any particular reason you don't want to use one?
 

kchriste

New Member
Forum Supporter
What are you getting your 12bit binary data from? An ADC? Then use an ADC that outputs BCD. A bunch of counter ICs? Use BCD counter ICs. Show us your design so far and we may be able to find a better solution.
 

kiki_barrios

New Member
Last edited:

crutschow

Well-Known Member
Most Helpful Member
Hello.
If what you want is to drive 7 segment displays using binary code, why don't
you check the binary to seven segment Decoder/Driver :

DM9374
That will display 0-9 for binary 0-9 but will display A-F for binary 10 through 15. Thus you still need some way of converting binary to BCD to display decimal numbers.

If you can use BCD counters as Diver300 suggested, then that could drive the binary to 7 segment decoder/driver to display normal decimal digits.
 

kiki_barrios

New Member
Hi
That's right, only if one feels comfortable with Hex numbers it would make sense
the use of a binary to seven segment decoder.

In my opinion, no reason can justify the use of many ICs to accomplish
what one microcontroller alone can do. It will save time, money, space and a lot
of wires=headaches.

Microcontrollers are the present and the future, every electronics hobbyist and professional should learn how to use at least one kind, if they want to keep in touch with this art.

Best regards.
 
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