Binary to BCD

[UmarFD]

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.

 

[crutschow]

See this thread https://www.electro-tech-online.com...o-decimal-circuit.95009/?highlight=BINARY+BCD.

 

[UmarFD]

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

 

[crutschow]

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]

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]

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.

 

[Diver300]

If you are using a counter to get your 12 bit binary, you would be better to replace the counter with a 4 BCD digit counter.

 

[kiki_barrios]

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

DM9374 datasheet pdf datenblatt - Fairchild Semiconductor - 7-Segment Decoder/Driver/Latch with Constant Current Sink Outputs ::: ALLDATASHEET :::

If that IC is not useful to you, then see, typical applications of :

DM74185A

https://www.alldatasheet.com/datasheet-pdf/pdf/102200/NSC/DM74185AN.html

Hope that helps

Good luck.

 

[crutschow]

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]

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.