binary to bcd

[salad260]

Hi guys,

Trying to design a circuit for a project and it requires binary to bcd conversion. I am aware that the chip that does this is no longer available, but I know it can be done using shift registers and adders, just have no idea how to implement it.

It needs to be created using logic (not programmable ROMs etc), and needs to update so the double dabble method appears the best way to do it. If anyone can tell me or atleast help me with how to implement this, it would be much appreciated.

Dane

[Miguel_V]

Hello,

I've personally never done the conversion with a circuit but if you look it up on google I'm sure you'll find a few tutorials. I found one here

http://www.interfacebus.com/Glossary-of-Terms-bcd-decimal-decoder.html

Kind regards,

[Crazyb]

If it's not to late and you want a solution, that only uses 7400 logic:

I've made a circuit two years ago that is easy to make and to upgrade.
I made it and it displayed 0-15 on two display.

The picture is how to connect all the chips together.