I'm frustrated now... I hooked up the oscilloscope to the fan header to look at the waveform. It was there, but very low voltage, <0.25V. Connected a fan, and it won't spin at all. Did I blow the fan header? I was quite careful last time I tested and never let the red connection from the header touc...

Yup, that sounds like them. I got mine from Jameco . Something like US $5.00 each on sale a couple of months ago. They used to be temperature controlled, but the tiny thermistor on the fan could not stand up to my 'modifications'. :evil: After ripping off one wire from one of the thermistors and los...

I'll try to get an idea of the frequency. My 'scope is an old EICO that isn't calibrated, but I may be able to get a reading with my frequency counter. Silvervarg, I tried your circuit last night with a discrete NPN darlington running an 80mm NMB fan and had no sucess. Same as before, full speed or ...

1.5W is more SPCR like Lol, that's for sure. When using Speedfan, the fans run at full speed before the program starts and on exit from the program, so whatever is connected to the fan header will have to be able to handle the current then. In normal use the fans would be turned way down. The fans ...

Thanks, silvervarg. It looks like I need to have R2 to pull the signal low. That would explain why I only got full speed from the fan. I'll try your circuit tonight. With R1 at 3.3k, I need an Hfe of at least 400. I don't have any darlington transistors right now, but will try a discrete darlington ...

I'd like to run two case fans with a total current draw of 1.5A at 12 volts from a fan header on an Abit NF-7 motherboard. The header can supply only about 0.3A. I'm using Speedfan and would like to use it to control the case fans, but need a circuit to take the PWM signal from the fan header and us...

canthearyou writes: When I look at watercooled or liquied cooled systems, I do not undestand how they can be any quieter than air cooled. You need a radiator to exchange the heat and that typically has fans blowing over the fins. Doesn't this just shift the noise from one location to another? Yup, ...

XP 2400+

Watercooled with passive radiator, no PS fan, and one 120mm intake fan.
Temperatures measured with ECS K7S5A motherboard sensors.

42°C CPU with normal use
45°C CPU with heavy use
31°C case.

The temps are the same as I was getting with my 1.4 GB Athlon.

Zhentar writes:
I've spent at least $400 on my cooler set up, not even counting the case ($150) I'm fitting it in, and the dremel ($80) to get the radiator to fit right.

And $3.00 for Band-Aids

that looks like wood to me :O Yup, it's a wooden template for routing the water passage and o-ring groove in the acrylic blocks. A guide ring on the baseplate of the router runs along the inside of the template. In the picture, the top piece of acrylic is attached under the template on the left. Ac...

lol...You're right about the messy cabling. lol again. I try to arrange them neatly, but can't seem to spend the time to get them looking better. Someday I'll origami the drive cables and spiral wrap everything else, The routing of the block was done with a template. I only ruined two pieces of acry...

An post as insightful as RoryB's deserves a personal reply point by point. Your computer will have to be pretty freaking far away from the magnet on any decent woofer to not be a problem I'm running a hard drive 13" away from the edge of a Dayton woofer magnet. It works fine. If I was to worry abou...

I've decided the answer to air leaks has to be a box for the computer within, but sealed off from the subwoofer box. Probably covered on the inside with aluminum to kill the EMI. Next up to figure out is how to cool the computer. I think I'll stay with watercooling the cpu and duct in cool air from ...

I spent this afternoon trying to get an arrangement of computer parts that would result in a reasonably sized box. I have most of the components drawn in Solidworks and came up with this as a starting point. http://webpages.charter.net/whinz/watercooling/$radv3/computer1.jpg The trick has been getti...

I got it from Allelectronics a couple of years ago. It's not listed on their site anymore.

Here's a closeup picture of the front of it.

I figure the speaker will be separated far enough from the computer so it won't cause a problem. It's only a floppy disk I would worry about. The floppy drive will be near the top of the box and the speaker near the bottom. I ran some tests today on a 10" and a 12" woofer with Speaker Workshop to ge...

It was done with a cheap drill press and a router. Had to work with what tools I have. I did buy the drill press just before starting the block. :wink: Had my first leak today. One of the ends of a vinyl tube started leaking. From use it had expanded a little on the barb. Luckily I had some spring c...

I've been accused on different occasions of having an overactive imagination and having too much time on my hands. Correct on both counts. Add an addiction to silent computing. :D I've been considering building a new subwoofer for my stereo system. Shortly after looking into making a vented speaker ...

its delayed until christmas zhentar

The bad news: I have to wait another few months for HL2.
The good news: I have some more time to upgrade my computer.

Remember when a 1.4Ghz Athlon and GeForce 2 was a killer gaming rig?

Here are some Solidworks renderings of the waterblock. The top piece is 1/2" thick acrylic, middle is 1/4" thick acrylic, and the bottom is 3/16" thick copper. Not shown are the four #6 cap screws holding it all together and two o-rings that seal it. http://webpages.charter.net/whinz/watercooling/$r...

Haggis Writes: Sorry for highjacking your thread Joe No problem, Haggis :D It's good to hear from you. Haggis Writes: Is your block homemade Joe? If so do you have pics posted anywhere? The block is a homemade variation of a block built by Cathar. Here's the link to his thread at Procooling . http:...

My first idea was to run the tubing radiator, res, and pump in the room behind the fireplace. That would have meant drilling two holes through concrete block. I've done it before and didn't feel like doing it again. As it was, I had to drill eight small holes into the brick to mount four pipe straps...

silvervarg writes: When I got enought money to spare I plan on building the absolute silent rig with no moving parts and it should be fairly small. It will not contain any optical drive or normal harddisc. It will however contain some kind of flash-disc and be connected to the network. You got me t...

Pump Update for Zhentar

The pump has been on for three and a half hours with the probe against the side of the pump body. It's reading 34C. No worries. It does have a little rattle, but with the pump box cover on I cannot hear a thing.

Wow, 90C seems really hot. :shock: What pump have you got? I've got a thermometer on my pump and will check the temperature after it has run for a couple of hours. Here's a link for the pump. After you go there, click 'Pumps' and go to page 2. It's the PM 2 UPC 02522. Not many specs there, though.

Nice setup. As I was going through the pics I thought it was going to really stick out on that fireplace hearth, but with the speaker where it is, the radiator and pump box almost disappear into the background. Thanks, I try to keep the spouse approval factor in mind when trying new designs. :lol: ...

I'd be a little worried about the pump overheating though, how are the temps on it? I just stuck my hand in the box and felt the pump. It's warm, but not so hot I'd worry about it. It's been on now for almost three and a half hours. I ran this same pump in the same box for the last three months. No...

Well, almost silent :wink: I've finally reached the end of my quest to build a pc that is quiet enough to live next to my desk and still run at an acceptable temperature. It has taken about a year to reach this point. I'm on the second waterblock and third radiator since the beginning of the journey...

I was thinking of making a fanless ( or almost ) water cooling system - putting copper pipes on my room floor ... What I need it a easy way to monitor the water temp and when need arises start the 120 MM fan that sits on the radiator. If you've got enough surface area on your tubing, I doubt you'll...

Great plan, Dutch2. Sounds like you've got quite a project there. Have you done much electronic design? I use a couple of temperature controlled fan controllers. The one on my regular computer is a slightly modified two channel version of the circuit Gooserider is planning without the DigiDoc. As an...