Easiest way to amplify sound with a JAMMA adapter?

modessitt

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So, I want to bench test Nintendo boards with a JAMMA adapter, but as far as I can tell, I need to run the 20EZ B+ voltage (+108vdc) to the original Nintendo sound board to get it to work. (And yes, i know I can buy one already built.)

What's the easiest way to build a quick little amplifier circuit for this? It doesn't need to to be Hi-fi Stereo. I just want to be sure the sounds work. The less space needed, the better.

Will probably need this for when I do Mr. Do boards later, too....
 
Most datasheets for audio amps have typical circuits drawn out in them. You could probably use that as a start.
You could always hack the board out of a pair of cheap pc speakers too, thats the easy way.
 
So, I want to bench test Nintendo boards with a JAMMA adapter, but as far as I can tell, I need to run the 20EZ B+ voltage (+108vdc) to the original Nintendo sound board to get it to work. (And yes, i know I can buy one already built.)

What's the easiest way to build a quick little amplifier circuit for this? It doesn't need to to be Hi-fi Stereo. I just want to be sure the sounds work. The less space needed, the better.

Will probably need this for when I do Mr. Do boards later, too....

If I were you I would buy the cheapest set of amplified PC speakers I could find. Where I live that's about $15. There must be something as cheap or cheaper where you live.

You could build something or try to use another audio amp you may have around but amplified PC speakers are a great option that I've used many times.

Here's an example:
http://warpzonearcade.com/?p=199

EDIT: Riptor beat me to it :)
 
Hmm. I do have a set sitting around that aren't doing anything. I could put an audio jack on the adapter and just plug the speaker jack into it....
 
On a semi-related note (and I hope I don't have to start a new thread to get the answer):

I notice on the DK pinouts, it has a pin for "Speaker" and for "TV Audio". Looking at the schematic, it looks like TV Audio is what goes to the audio amp, and that the Speaker output is already amplified. Since the "Speaker" output part of the schematic is surrounded by dotted lines, I assume that this on-board amplifier isn't always present.

Does this sound correct to anyone?

Apparently, I just run the other speaker lug to ground for either output...
 
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