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.

 

See this thread 8 bit binry to decimal circuit.

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Carl
Curmudgeon Elektroniker

 

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

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There are 10 types of people who understand binary...
Those who do and those who dont.

 

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.

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Carl
Curmudgeon Elektroniker

 

So use some EPROMs then. A microcontroller is much easier to do it with. Any particular reason you don't want to use one?

 

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.

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Inside every little problem, is a big problem trying to get out.

 

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.

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