/v/ - Video Games

>>14797512

Is that red thing supposed to be an arrow?

Also bumping for interest.

>>14797512

http://lmgtfy.com/?q=electrical+schematic+symbols

>>14797582

Alright you passive aggressive fuck, which is it? Either it's a capacitor or a contact, but it can't be a capacitor because no value is listed, and having your VCC connected to Ground makes no fucking sense.

>>14797613

It is a capacitor. Usually used as an earth for an antenna. From what I remember from my electronics phase

>>14797512

Anon it's like $30. Unless you're valuing your labor at $0, I can't imagine you'll build a cheaper one.

>>14797613

It's a capacitor.

It probably is being used there to make that a ground for AC signals only so it won't ground out your DC bias voltage.

VCC is usually a digital high voltage, so I can only assume that AC ground is being used to stop something bad happening from that LED flickering on and off or something to do with whatever the 5p pin is attached to.

>>14797628

Building electronics is fun, although I do see your point since I'm looking and some are between 30 and 40 bucks.

>>14797642

Fair enough, fun is as good a reason ass any.

>>14797639

It's a SNES multitap, 5P is "5 Player Mode". The question is what capacitance is required. The VCC is coming from the SNES's controller port, which I think is 5V, either way there is no AC on this circuit.

Its just a capacitor, to filter noise off the IC's VCC pin.

It would actually be better to have single 0.1uF caps for each chip VCC pin.

Every one else in this thread about the capacitor is completely wrong.

Specifically the characteristic of the capacitor is to pass ac signals to ground (noise). This results in a stable dc supply for the chips.

>>14797720

Appreciated. I'm going to just use one, as this schematic is directly out of Nintendo's own dev handbook.

>>14797667

There is AC on the circuit whether you want it or not. The SNES uses an AC voltage that's converted to DC by being filtered and rectified so there's going to be some noise in that VCC voltage. Whether it's enough to warrant filtering it out or not isn't something I'm aware of.

My guess would be it's probably not a huge concern, hence the lack of capacitance value on the drawing. As long as you put some kind of relatively low value capacitor in there, it'll probably work fine.

>>14797759

I wonder if there's a capacitor in my SNES controllers. That would probably be a good place to start.

>>14797784

yup, 0.1uf noise suppressor.