Making a DK JAMMA adapter - +24

modessitt

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What's the best way of generating the +24 needed on a DK pinout? Will the +12 be enough to make it work?
 
Hmm. i guess I should go look at the schematic.

I couldn't care less about a coin counter. I'm just looking to bench test some boards so I can sell them as working. I'll be using an inverter board for my test bench monitor so don't have to drag a Nintendo cab close...
 
Yeh, the +24v is strictly to operate the coin counter meter.

I would switchout the meter to a 12vdc one instead and then change the power wire that feeds it to 12 volts.
 
#1. It's only for the coin counter.
#2. What's wrong with all the adapters currently available with the video inverters and sound amps built in?

#1. Good to know.
#2. Do they cost less than $5? That's what it'll cost me in parts to make one, and I have several good inverter boards and sound boards lying around already, so I can spend an hour and test a board, rather than spend $20+ and wait several days (at best) to test a board...
 
#1. Good to know.
#2. Do they cost less than $5? That's what it'll cost me in parts to make one, and I have several good inverter boards and sound boards lying around already, so I can spend an hour and test a board, rather than spend $20+ and wait several days (at best) to test a board...

I guess if your time is worth nothing, you can say things like that...
 
I guess if your time is worth nothing, you can say things like that...


Hmm. So if I understand you correctly, an hour is worth more than 3 days?

Scenario #1 - I can work for an hour with $5 worth of parts, and then I can test and sell a board today for $80-100.

Scenario #2 - I order one from you (or somebody) for $20-30, then wait 3 days (or more) for it to get here, and then I can test and sell it for the same amount.

Which one is more economical for me? Perhaps if I had a billion repair projects lined up that I could work on while I waited, then it would be okay, even though the adapter would still cost me more (provided I charged someone $80-100 for the work I would normally do in that hour). And I do have a bunch of projects to work on, but none are for people waiting for something...
 
You're not losing the $80-100 over 3 days... just the interest on it... which, right now, is probably about $.10 :)

Your point was that the hour required to build it was worth more than the finished product, and that I could save time buying one already done.

My point was that I'd end up waiting more than an hour to use it if I did that, and that would cost more than the hour to build it.
 
Do Nintendo PCBs put out the opposite polarity RGB than Jamma?

I am looking at getting a DK board to do the DK II mod, I guess I will need to purchase an adapter, if this is true.
 
Do Nintendo PCBs put out the opposite polarity RGB than Jamma?

I am looking at getting a DK board to do the DK II mod, I guess I will need to purchase an adapter, if this is true.

Yes, they put out video inverted compared to standard JAMMA, also the audio output is un-amplified so an adapter also needs to have a amplifier on it.

So if you want to run in a JAMMA setup you will need an adapter. Mike Haaland's ones are pretty nice http://www.mikesarcade.com/cgi-bin/store.pl?sku=NIN2JAMMA

- James
 
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