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Search: Posts Made By: mariush
Forum: PC Power Supply Discussion 2 Days Ago
Replies: 46
Views: 801
Posted By mariush
Not necessarily, sometimes two or more capacitors...

Not necessarily, sometimes two or more capacitors are used due to height limitations (tall capacitors may hit the fan on top)
But this power supply doesn't require a lot of capacitance (it's not a...
Forum: PC Power Supply Discussion 06-09-2016
Replies: 85
Views: 2,836
Posted By mariush
It depends on the hard drives you use and the...

It depends on the hard drives you use and the motherboard or additional sata controller.
Regular hard drives use 12v and 5v, the newest ones use up to about 0.8-1A on 5v on average and a bit more in...
Forum: PC Power Supply Discussion 06-07-2016
Replies: 12
Views: 586
Posted By mariush
40-60mm (or whatever that size is) at 6000 rpm...

40-60mm (or whatever that size is) at 6000 rpm fans on desktop/workstation computers ?

God no..
Forum: Electronic Component Discussion 05-21-2016
Replies: 1
Views: 219
Posted By mariush
No, nothing to worry about it. Polymer...

No, nothing to worry about it.

Polymer capacitors are solid, so it's all good. Even if the case would be broken all the way through, it should still not be much of a problem short term.
Long...
Forum: PC Power Supply Discussion 05-09-2016
Replies: 11
Views: 396
Posted By mariush
There's no need for capacitance at the input...

There's no need for capacitance at the input because the power supply already has enough.
It wouldn't hurt to add a 0.1uF 25-50v ceramic capacitor between Vin and GND at the input.
I guess it...
Forum: PC Power Supply Discussion 05-09-2016
Replies: 11
Views: 396
Posted By mariush
That's a nice idea. You could buy a molex...

That's a nice idea.

You could buy a molex male to 2 molex female adapter cable (http://www.newegg.ca/Product/Product.aspx?Item=N82E16812119009&ignorebbr=1) and cut it up, and use the male molex...
Forum: PC Power Supply Discussion 05-09-2016
Replies: 11
Views: 396
Posted By mariush
You can use DC-DC converters to generate 5v out...

You can use DC-DC converters to generate 5v out of 12v.

For example, here's a 12v in, 5v @ max 6A out :

OKL-T-6-W12N-C
digikey :...
Forum: Electronic Component Discussion 04-11-2016
Replies: 10
Views: 549
Posted By mariush
LM1084 is still a linear regulator, so the...

LM1084 is still a linear regulator, so the efficiency will still be only ~42% (12v in, 5v out... means 7v will be wasted as heat).

Even a cheap MC34063 based dc-dc converter with the lousiest...
Forum: Electronic Component Discussion 04-10-2016
Replies: 10
Views: 549
Posted By mariush
There are drop in replacement solutions from...

There are drop in replacement solutions from various companies, but they're usually quite expensive, see for example

up to 5v@1.5A :...
Forum: Electronic Component Discussion 04-02-2016
Replies: 4
Views: 308
Posted By mariush
See https://www.youtube.com/watch?v=sHL0a80_oJc ...

See https://www.youtube.com/watch?v=sHL0a80_oJc

Not recommended though, because there's lots of surface mounted components on the back side which won't tolerate being so hot for more than a few...
Forum: PC Power Supply Discussion 03-27-2016
Replies: 33
Views: 1,837
Posted By mariush
That's not always the case. For example,...

That's not always the case.
For example, Seasonic has some designs like the X series where the 12v mosfets are on the bottom of the PCB (and cooled by the case) and the 5v and 3.3v dc-dc converters...
Forum: PC Power Supply Discussion 03-02-2016
Replies: 41
Views: 2,009
Posted By mariush
Well, you could pre-cut the leads of the...

Well, you could pre-cut the leads of the components to the desired length but I suspect it would slow down the workers (I think it would take more time to insert components) and some components may...
Forum: PC Power Supply Discussion 02-23-2016
Replies: 7
Views: 671
Posted By mariush
The G-360 has a bad price here in my opinion. I'd...

The G-360 has a bad price here in my opinion. I'd have no incentive to buy it.

The S12II-430 (http://www.pcgarage.ro/surse/seasonic/s12ii-430-bronze-430w/) is about $70 and the S12II-520...
Forum: PC Power Supply Discussion 02-17-2016
Replies: 9
Views: 553
Posted By mariush
Your brick says 240v 1.8A but that's somewhat of...

Your brick says 240v 1.8A but that's somewhat of a peak value, or maximum.

Think about it, do the math on how much the laptop brick is supposed to deliver to your laptop, it should be listed on...
Forum: Electronic Component Discussion 02-11-2016
Replies: 8
Views: 750
Posted By mariush
Interesting. I have a comment about your...

Interesting.

I have a comment about your resistor choices. Those resistors don't really like being overloaded and they don't even like being close to their maximum watt limit for long periods of...
Forum: General Hardware 01-26-2016
Replies: 4
Views: 610
Posted By mariush
As cheapie says, we'll need more details about...

As cheapie says, we'll need more details about what your total budget would be.

For example, I could recommend a very cheap motherboard based on socket AM1 but you'd only be able to use some AMD...
Forum: General Hardware 01-22-2016
Replies: 12
Views: 1,231
Posted By mariush
An answer on that page says it's S27E510C :...

An answer on that page says it's S27E510C : http://www.samsung.com/us/computer/monitors/LS27E510CSY/ZA-specs - I guess S27D590C but without speakers (just a stereo out jack in case you pass audio...
Forum: Electronic Component Discussion 01-20-2016
Replies: 4
Views: 498
Posted By mariush
The alibaba link says 7343 in the name, that's...

The alibaba link says 7343 in the name, that's the metric size... helps when filtering to choose replacement capacitors... 2917 [7343 Metric]

226 does sound like 22 uF, the voltage rating of 35v...
Forum: General Hardware 01-16-2016
Replies: 3
Views: 4,700
Posted By mariush
Chassic fan is usually the one you put on the...

Chassic fan is usually the one you put on the case.
System fan is usually the one that sits on top of your cpu cooling a heatsink.

Technically, they're both 12v power connectors, with or without...
Forum: PC Power Supply Discussion 01-14-2016
Replies: 20
Views: 1,055
Posted By mariush
You could leave it a basic button (no retooling...

You could leave it a basic button (no retooling of case and whatever else) but make it behave it two ways:

* basic press down : (fan test) have fan turn on fully for 5-10 seconds then back to it's...
Forum: General Hardware 12-30-2015
Replies: 7
Views: 1,011
Posted By mariush
Anti-static bags are not necessarily insulating. ...

Anti-static bags are not necessarily insulating.

There's various degrees of "anti-static"-ness ... the pink bags are usually anti-static, the other varieties are dissipative or just conductive,...
Forum: PC Power Supply Discussion 12-25-2015
Replies: 10
Views: 776
Posted By mariush
No, the usb 3.0 says 20v +/-10% which means...

No, the usb 3.0 says 20v +/-10% which means 18-22v ... it allows using 25v rated polymer capacitors or electrolytics at the input, and a usb power controller can just flip a mosfet on or off to send...
Forum: PC Power Supply Discussion 12-25-2015
Replies: 10
Views: 776
Posted By mariush
I wish it would go away, along with -12v. A...

I wish it would go away, along with -12v.

A dc-dc converter on the motherboard would cost peanuts (under 1$ of motherboard price) and you wouldn't have to worry about sensing voltage on the 3.3v...
Forum: PC Power Supply Discussion 12-03-2015
Replies: 13
Views: 725
Posted By mariush
Dude, pretty much everything in a computer these...

Dude, pretty much everything in a computer these days uses dc-dc converters to get lower voltages from 12v, everything except fans (which will work with up to 13.8v anyway) and maybe some regular...
Forum: PC Power Supply Discussion 12-03-2015
Replies: 13
Views: 725
Posted By mariush
Yes, I think it won't be a problem with a solid...

Yes, I think it won't be a problem with a solid design, like the Seasonic one.

See the 520w "brother" : http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=185

It does 4.85v at...
Showing results 1 to 25 of 258

 
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