(Topic ID: 258367)

Gauging interest: Interflip Dragon Sound Board

By semicolin

50 days ago

Topic Stats

  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 49 days ago by semicolin
  • No one calls this topic a favorite


Linked Games

#1 50 days ago

These aren't terribly difficult to troubleshoot and rebuild, so I don't know how much interest there is in a complete board replacement. I figured I would ask here first. Is this a thing that I should bring to life?

Not sure if I should proceed if I'm going to undercut someone. New old stock still seems to be available from https://www.flippers.com/catalog/product_info.php/sound-board-dragon-p-2818 but I feel I can make something with better, newer components for well under the $350 that they're asking. moto_bone had previously mentioned a year ago that this might be a work in progress, but I don't know if that's still on the radar.

It wouldn't be a plug-and-play board; jones connectors are impossible to come by new and the pins that Interflip used don't seem to be standard. Probably the best I can manage is a short harness with a disconnect on the new board and male pins that can be inserted into the appropriate places on the existing female jones connector inside the cabinet.

In any case, I figured I'd float this trial balloon. I've changed PCB design suites over the holidays and I need a project to practice with. I'd rather make something that fills a need in the community rather than just serving myself.

#2 50 days ago

You'll probably find more interest in the SS forum.

#3 50 days ago
Quoted from currieddog:

You'll probably find more interest in the SS forum.

Interflip's Dragon is very much an EM game. You might be thinking of Gottlieb's Dragon, which was available in a solid-state derivative.

#4 50 days ago
Quoted from semicolin:

Interflip's Dragon is very much an EM game.

It is!! Thrown off by "boards."

#5 50 days ago

There will probably be limited interest in such a niche item, but it's always good to have another source for an item that is ridiculously overpriced like the one you linked to. I don't even think it's NOS. Looks used.

Maybe you could come up with something that has selectable sounds that could be interchanged with other machines or manufactures. I have a Zaccaria EM game with a sound board like that.

#6 49 days ago

Well, I sat down over the last couple of days, chewing apart the electronics on my rev 10-95 board. I've compared it to the 10-90 revision from IPDB. Completely different power regulation on both of them, but similar trigger logic inside the game. Ground to trigger chimes, and interruption of the flipper supply voltage via a change of state on the Y relay as well as two shorted pin on the sound board to trigger the Dragon. My late revision and the IPDB version are compatible.

Unfortunately, I've now also come across a schematic for an earlier variant with completely inverted triggering logic.

It's not just contrasting connections on the jones plug... plugging a board designed to work with one model into the incompatible model of the game could damage the game itself.

I think this project will have to be shelved nearly as quickly as it was created. I redesigned the power supply, started laying out the PCB, and was nearly ready to order parts for prototypes, and then realized that it's possible that I'll be putting a lot of energy and money into a board that will only work in an unknown number of the available games out there.

I'll finish the schematic for the revision I have and upload the KiCAD files for anyone interested in picking this up in the future. Please note that it should only be used in game models that have continuity between the Blue-White wire on the sound board jones plug and the common wire on the flipper coils (AC supply). If your model has continuity between the Blue-White wire on the sound board jones plug and the common wire on the cabinet flipper switches(Earth), you MUST NOT use these schematics.

Furthermore, this design is untested, even in my own game, so, uh, I guess if you know enough about KiCAD to get a project out of it, please correct my mistakes. I hope I found more on Interflip's schematics than you will on mine.

Edit: Here's what was started. Have at it. https://drive.google.com/file/d/1U04HuQMaHo-dikjyU396-7VlQFeRf9D7/view?usp=sharing

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