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Neo-Geo credit displays. How to recreate?
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LeedsFan:
I have decided that my latest project will be based on a two player Neo-Geo layout with appropriate artwork. I thought it would also be cool to build in the double digit LED credit displays as on the original cabinets. I'm building this from scratch so I have no original hardware. I just wondering how easy it is to wire up something like this and if anyone else had already tried it?

I think I may have to wire them up so that a separate circuit is used each time the credit button on the panel is pressed. (I will have separate small credit buttons for each player to the right of their respective start buttons) That's not too hard but of course the credit has to go down one for whichever player is next "up" and his game starts. So wiring up to "1 Player Start" etc. seems logical enough.

All this of course has no direct correlation to the credits displayed in Mame. I don't think there is any way to control these LEDs from within Mame itself, though I could be wrong.

However my problem is that I have very limited electronics experience. I need a wiring diagram as to how to rig this system up, and that's assuming the way I am thinking it will work is fine. I don't mind fiddling with breadboards or soldering etc.
Ed_McCarron:
If you want to avoid programming, try a 74192 counter with a 7447 driver -- google will produce tons of ideas.  You'll need one set for each digit, and a source of 5v, and a nice debounced switch.

Or, work on some programming skills and use a basic stamp or arduino to handle it all.

If the credits get out of sync with the MAME software, all bets are off. :)
CheffoJeffo:
Someone here in Canada was doing exactly what you describe. Damned if I can find the thread though.
JustMichael:

--- Quote from: CheffoJeffo on October 04, 2010, 08:09:52 am ---Someone here in Canada was doing exactly what you describe. Damned if I can find the thread though.

--- End quote ---

Did you mean this thread?
Malenko:
just for clarification, there's 2 single digit LED displays and not a double LED
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