Star Castle - CAX game - freeplay - help!

johnvv

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Trying to get a Star Castle ready (at the last minute) for CAX.

How do I wire it to correctly install a credit button?

Has anyone done this and/or have pics they could send? Game goes to CAX on Friday a.m., so any help is much appreciated. I would much rather have a credit button on the game than have folks have to open the coin door and manually hit coin mechs.

Background info::

- Of course, this is a Cinematronics game, so everything is different or weird.

- I have tried the notes (below) with a 3-wire SPDT momentary switch. I could not get the button to do anything, though I would, occassionally, get credit to register as I was moving the wires around. I used this switch:

http://www.radioshack.com/product/index.jsp?productId=2062541

- From another KLOVer, the issues and approach to do this:

"The wiring for the coin-mech switches is odd. One switch appears to feed through the other. It works out that there are two coin inputs. One is normally open and one is normally closed. Both have to be activated at the same time to indicate a coin drop. Since the CCPU uses both inputs to see a coin drop, it cannot see two mechs. To get around this limitation, the mechs were essentially wired in series, albeit a little strange looking. Either mech can cause both signals to toggle. Another function that the CCPU does to circumvent cheaters is that it actually times the coin drop. If the CCPU thinks that the drop duration looks reasonable and if it has detected both coin signals, then it thinks everything is okay and grants a credit.

To wire up a CCPU to work with a credit button, you could remove one of the coin-mech switches and install a SPDT pushbutton switch and wire up all three leads. That would leave one coin slot as non-working. You can't just connect the new switch in parallel with the mech switch because it must also break, not just make (or vice-versa). Also, the timing of the pushbutton is important. If someone clicks it too slow or too fast, it won't credit."

Thanks for any help!
 
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