m00dawg wrote:
Haha no I mean how do the diodes prevent the static form getting to the CPU if they are not in front of the pin directly? Like why does the electricity want to be fed through the resistors and diodes instead of just going back to the CPU pin?
Well, first off the resistor is physically in the way, so it's obvious why it has to go through the resistor. As to the diodes...
There's no real place for an external voltage applied to the CPU pin to go. So if it's too high or too low, dielectric breakdown, magic smoke, suffering and woe. The diodes simply provide any path for the too-high voltage to go at all, rather than making a (tiny invisible) hole through your NES.
Quote:
Thanks again! I didn't see a "buy me a beer" link in your sig. You should add one :)
:D
Super-Hampster wrote:
lidnariq wrote:
But a bunch of sufficiently large resistors should have worked fine.
I was thinking about that actually. [...]I left the values off because I was just trying to draw a quick diagram, and I'll have to play with the resistor values. I don't want them so large it's too quiet, but so small they don't prevent mixing. A little mixing would be ok though. My other option would be to simply mix it in with one of the left or right channels.
Try this-
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stereo.png [ 1.19 KiB | Viewed 1572 times ]
Maximum stereo separation is going to only be -20dB with 1k resistors and 10k pots, but everything I've read about it implies you don't want the NES outputs panned too hard left or right. Using 1k and 10k reflects expecting a 50k input impedance on the amp. This schematic will also let you put all three of the channels anywhere, left or right. Feel free to increase or omit the capacitors but not decrease.
edit: uploaded image instead of off-site hosting