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Newbie asking about circuit boards. (NES related)

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Chris2:

Hello all. I'm still very new to the MAME arcade scene. I decided, however, that before I would take on something like PC work that I wanted to try making an arcade controller for something simpler, like the NES. One problem, however, is that I, in my inexperience, can't tell the difference between the button's solder points and the ground solder points. Does anyone know which are which and where to solder the parts to?

Also, I remember reading that the NES actually uses an NO format, rather than the NC format. Can anyone confirm this and whether or not it has any effect?

Again, sorry If I'm asking some stupid or redundant questions. I'm still very new at this.

Thanks! :)

SavannahLion:

Whuh??

OK, I think I know what you're getting at.

If you're hacking out a NES controller to make a arcade panel to attach to your NES, you can avoid the whole "what is ground" problem by just running wire pairs from each button to each pad. A little messier, but less of a hassle.

If you're jonesing to make things simpler in terms of wiring, the traces from IC to pad would be "hot" and the traces leading away from the pad to the wire would be common, or ground.

If you're using cherry switches, look carefully on the side, you should see that next to each metal tab is a C, NO and NC. Wire it up to the NO and C and leave NC alone.

The NES uses an inverted system where low or off denotes a button press. Don't think of that and just wire it up, you should be fine.

ChadTower:


The NES doesn't do straight-thru wiring for its controllers. 

SavannahLion:


--- Quote from: ChadTower on May 11, 2007, 09:27:59 am ---The NES doesn't do straight-thru wiring for its controllers. 

--- End quote ---

Is he talking about straight-thru wiring? I was under the impression he was hacking an NES controller.

ChadTower:


Possibly not, but given that he's mentioning MAME and NES in the same sentence, I figured it may be worth pointing out to him, just in case.  There are some NES specific issues here, as you know.

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