Idea for overcoming 5v drain on Opus when shutdown.

**ShinkunoNamida** · 02-06-2003, 12:28 PM

Ok, I'm in no way an EE and I'm not even very good at soldering but this is my idea

you take a 12v from a molex on the epia, and the power on signal (accessory line) use diodes to avoid problems and connect them to a relay.

so when you want your computer to be on the relay stays closed and your computer stays on, when your computer shuts down, the accessory line and the 12v line off the power supply should have gone cold and the relay opens and no more power goes to the supply.

No more worrying about that 5v line staying hot to keep your usb devices active.

As far as I can tell this would work, but like I said.. I have no idea, and I probably would need help wiring it up even though it was my idea

**Mikesz** · 02-06-2003, 03:46 PM

sounds kindof like the schematic I posted just this week.......

Its at the bottom

mike

**ShinkunoNamida** · 02-06-2003, 03:49 PM

I saw that, but I didn't think it was the same. I have no idea though

I've been playing music for years, and I can't read sheet music either.. maybe one of these days I'll start learning how to put things on paper instead of keeping it all in my head

**Twostep** · 02-06-2003, 05:41 PM

Well, if you don't use standby, you should be able to cut the standby voltage line on the ATX header, right? I don't see why a MB would need it if it were truely off (or in hibernate? Not sure about that one)

Twostep

**ShinkunoNamida** · 02-06-2003, 05:50 PM

what I'm saying is to use a relay to cut the main power to the supply (I suppose you could use it to also controll whether your amp is on or off)

the problem is the USB devices draining power (from what I understand) if they have some sort of functionality that could potentially wake the computer or turn it on, or what ever the case may be. This is just a security blanket, I suppose, to keep anything like that from happening.

**Mikesz** · 02-06-2003, 06:49 PM

twostep -- thats right but I would rather not cut any wires so I dont void the warranty. I guess I could get an atx extender cable though and modify that. Cut the 5vsb line and connect the motherboard side to the switched 5v line, or like you said, not connect it at all. Ill try both and see how it turns out. Time to buy an opus.

mike

**Twostep** · 02-06-2003, 07:54 PM

Originally posted by Michael Szilagyi
twostep -- thats right but I would rather not cut any wires so I dont void the warranty. I guess I could get an atx extender cable though and modify that. Cut the 5vsb line and connect the motherboard side to the switched 5v line, or like you said, not connect it at all. Ill try both and see how it turns out. Time to buy an opus.

I don't actually have one, but I think You have to use an ATX extender for the Opus. I thought I saw that they just have an ATX Male connection on the PS, and they give you a cable to connect to your MB.

Twostep

**TruckinMP3** · 02-07-2003, 10:41 AM

Originally posted by ShinkunoNamida
what I'm saying is to use a relay to cut the main power to the supply (I suppose you could use it to also controll whether your amp is on or off)

the problem is the USB devices draining power (from what I understand) if they have some sort of functionality that could potentially wake the computer or turn it on, or what ever the case may be. This is just a security blanket, I suppose, to keep anything like that from happening.

ShinkunoNamida, if I understand what you described you would not be able to turn the system back on.

The relay that would need power is "behind" the part of the circut it cut. Hope that makes sense.

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