Hi everyone-
Thank you for the informative responses. Some of the technical terms are a bit over my head, but I'm following. It seems that if this were laid out on a bench, it would be a sprawling circuit. My dad is technical, and if he had schematics, he could put together what you're referring to. He isn't certain where to start, but is going to help me on this project based on your recommendations.
The scale of this circuit is important to me, and I'd like to keep it as small as possible. I'm not sure if this is the right forum to ask about the following, but would an Adruino controller be able to power 12 led display boards while keeping the size down? If so, would we be able to wire the thumb-wheel switch into the Adruino to control the numerals?
I'm open to making the circuit based on your suggestions within if we can develop a way to keep the scale down.
Thanks for everything thus far.
Cheers,
John
Why not fan out thumbwheel data to all four 4543's simultaneously? When you want to accept a 4-digit readout at a particular 7-segment display, then flip a switch activating a latch (that is, four latches associated with that 7-segment display). Then that 4-digit number is locked into those 7-segment displays.
Sincerely, excuse my ignorance, but I think this is what I was trying to describe early this morning. I don't even know what a latch is, or that I needed 1 per BCD. I think I'm following what latch does now.
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