HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Apr 22, 2012, 07:12 AM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Hey vnt17.

Is either one of those 2 top pins ground?
xandrios is offline Find More Posts by xandrios
Reply With Quote
Sign up now
to remove ads between posts
Old Apr 22, 2012, 07:35 AM
Registered User
Joined Apr 2012
18 Posts
no, but i found out that the "middle pin" shows that behaviour on most other pins connected through a resistor. on 2 other pins it switches or "ticks" all the time slower on one and faster on another. does that tell anything?
vnt17 is offline Find More Posts by vnt17
Reply With Quote
Old Apr 22, 2012, 09:13 AM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Do you get any voltage on the output when this happens?
xandrios is offline Find More Posts by xandrios
Reply With Quote
Old Apr 22, 2012, 09:51 AM
Registered User
Joined Apr 2012
18 Posts
yep, my multimeter reads 1,4v at +12v to gnd. because its just to slow. the fan kind of "shakes" because of the relatively fast switching on and off
vnt17 is offline Find More Posts by vnt17
Last edited by vnt17; Apr 22, 2012 at 10:55 AM. Reason: because
Reply With Quote
Old Apr 22, 2012, 02:20 PM
Registered User
Joined Feb 2011
7 Posts
Fan dial/ regulator for 1300watts PSUs?

Hey all,

I bought two of these HP 1300Watt PSU (PART No: 337867-001), and I see someone has got the fan noise down by adding resistors to the positive leads on the fans. Here is the Link .

My question is there a way to build in a dial for the positive leads, so we can regulate the cool/noise of these units?

Thanks,
Nick

Sorry, not an EE by any means.
nickmind is offline Find More Posts by nickmind
Reply With Quote
Old Apr 22, 2012, 04:22 PM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Hello nickmind.

The simplest way for an adjustable passive method would be to use a high power wire wound 2 watt or 4 watt potentiometer.

A single 2w 8-10 ohm resistor in parallel with the high power potentiometer will make fan speed adjustment more manageable.

A scavenged 8 ohm L-Pad may also work. They are commonly used to passively match driver output levels in speaker enclosures. L-Pads are much larger than normal potentiometers however.

A car instrument panel light dimmer rheostat might also work.

Hack and Slash.

I've tried to directly manipulate the fan speed controller circuit for the DL580 G3 PSU.

The driving transistor gets very hot though as fan speed is reduced. It is not the recommended method.

There is also that nasty 160-170 Hz Tach signal barrier. The PSU will shut down if you go below this limit.
xandrios is offline Find More Posts by xandrios
Last edited by xandrios; Apr 23, 2012 at 08:29 AM.
Reply With Quote
Old Apr 22, 2012, 04:52 PM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Hey vnt17.

You're gonna have to go Han Solo on that FS011U PSU.

Sounds like your on the right track. I'm rooting for you.
xandrios is offline Find More Posts by xandrios
Last edited by xandrios; Apr 22, 2012 at 05:05 PM.
Reply With Quote
Old Apr 22, 2012, 10:56 PM
Registered User
Joined Feb 2011
7 Posts
Quote:
Originally Posted by xandrios View Post
Hello nickmind.

The simplest way for an adjustable passive method would be to use a high power wire wound 2 watt or 4 watt potentiometer.

A single 2w 8-10 ohm resistor in parallel with the high power potentiometer will make fan speed adjustment more manageable.

A scavenged 8 ohm L-Pad may also work. They are commonly used to passively match driver output levels in speaker enclosures. L-Pads are much larger than normal potentiometers however.

A car instrument panel light dimmer rheostat might also work.
Hi xandrios,

Would something like this work? Potentiometer

I really don't know what I'm looking for, I guess 2 or 4 watt potentiometers are hard to fine? What many ohm's am i looking for i see from 5k to 100k? Are those to much? Also if I happen to find the right potentiometer, will i be able to get some full power to the fans (zero resistants)? And be able to wire both fans to one potentiometer?

Thanks for the help,
Nick
nickmind is offline Find More Posts by nickmind
Reply With Quote
Old Apr 23, 2012, 09:03 AM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Hey nickmind.

That 5K 1 Watt Audio Taper Potentiometer wouldn't be able to handle the fans in the DL580 G3 PSU.

You would need a wire wound pot for sure if you want to control both at once.

I've found one that would work perfectly. It's inexpensive but it is larger than a normal potentiometer. It's a 5 watt 100 ohm pot for $3.98 plus shipping.

http://www.parts-express.com/pe/show...number=023-604

A 9 ohm 4 watt resistor in parallel with that power pot would be perfect for controlling both fans at once.

The circuit will see a resistance from 8.26 ohms(slowest speed) down to 0 ohms(full speed)
xandrios is offline Find More Posts by xandrios
Last edited by xandrios; Apr 23, 2012 at 09:14 AM.
Reply With Quote
Old Apr 23, 2012, 09:33 AM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Hey nickmind.

I Just Had a Brainstorm.

I thought of a way to have variable fan speed control using a small 1/4 watt pot for the DL580 G3 1300w PSU.

It's a "Thinking outside the box" method.

I'll post the results either today or tomorrow.
xandrios is offline Find More Posts by xandrios
Last edited by xandrios; Apr 23, 2012 at 09:40 AM.
Reply With Quote
Old Apr 23, 2012, 10:20 AM
KK4NZS
Nelapaty's Avatar
Virginia
Joined Sep 2006
1,332 Posts
Xandrios that would make it nice instead of switches I have the resistors connected but these things need cooling so i left them alone without using the circuit to fool the motherboard..

I also realise these are the best compact to power ratiowise..
and the hp600pb next in line..
Nelapaty is online now Find More Posts by Nelapaty
Reply With Quote
Old Apr 23, 2012, 10:48 AM
Registered User
Joined Apr 2012
18 Posts
hey xandrios, tried to call han solo but leia was picking up and had no idea, so its your turn again

i tested all the pins again, thats what i got (to gnd)

res.
volt.

0 .22k open 50k open open

34k 14.8k open 100k open open
.......0,02v

34k 2,77k 3k 6k open open
.......0,03v 0v 0,87v

open 1k 6,1k .12k .11k open
.......0,04v 0v

still no idea, tried all pins that were showing voltages to gnd but nothing happened. the pin that showed that strange behavior is the 100k one?! is there an way of finding out pson on the pcb? its nicely built, much room to identify something.
vnt17 is offline Find More Posts by vnt17
Last edited by vnt17; Apr 23, 2012 at 10:50 AM. Reason: because
Reply With Quote
Old Apr 23, 2012, 01:29 PM
Steven
xandrios's Avatar
United States, CT, East Hartford
Joined May 2010
504 Posts
Hey vnt17.

Sometimes the PS On needs to be pulled high and the PS Kill pulled low to get the PSU started. This makes it much more difficult to get the PSU started.

Also PS On usually runs directly to a daughterboard.
xandrios is offline Find More Posts by xandrios
Reply With Quote
Old Apr 23, 2012, 03:18 PM
Registered User
Joined Apr 2012
18 Posts
there are 2 big boards in the psu, and a small board soldered on top with 3 pots on it. should it run to there? are you interested in some pics of it?
vnt17 is offline Find More Posts by vnt17
Reply With Quote
Old Apr 24, 2012, 10:03 AM
Registered User
Joined Apr 2012
3 Posts
hi @ all
could anyone tell me if it is possible to run Dell PowerEdge 2850 Server 7000814-0000
in parallel mode?if yes which pins should be connected using the pinout from page 87?
thanks for any reply and sorry for my bad english.
regards
Stangelator is offline Find More Posts by Stangelator
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Alert Need advice on high grade power supply for ISL-8 Byron Betterly Batteries and Chargers 7 Dec 07, 2003 08:31 PM
12volt, 9amp power supply for sale Paul Susbauer Aircraft - Electric - Airplanes (FS/W) 1 Dec 03, 2003 12:44 PM
12volt wallwart power supply reading 14.6 ? (help) power Batteries and Chargers 4 Sep 09, 2003 04:21 PM
Where to Get A Quality Power Supply? Joe Elston Batteries and Chargers 4 Apr 29, 2003 02:09 PM
High end charger and power supply for sale! Very new. ted616 Aircraft - Electric - Airplanes (FS/W) 6 Dec 02, 2002 11:31 PM