Exterior PSU & powering a pelt?

[krag]

I am condensating proof mobo right now with owens corning silocone and neopreme. But my question is what all do I have to do to my exterior psu in order to power my 156w pelt?

I know that I have to put a wire from a ground (black) to a green one, right?

Do I have to do anything else?

Thanks Bros, krag

When I get it up and running I will post results and pics.

 

[Diggrr]

As long as the power supply can put out the amperage needed by the TEC, (you checked it, right?) then you need to do the wire bridge as you described, maybe even puting a switch on the wire. A relay running off of the main psu is even better, so that it never fails to come on with the computer! Just substitute the relay's normally open contacts for the bridge wire, and power the coil from a spare molex 12 volt.

The other thing you need is a 1-2 ohm load on the 5 volt line of one of your molex connectors. If you use a resistor, make it a 1-2 ohm 25 watt (or higher) resistor, it will get warm, so consider where you mount it. This is required to allow the 12 volt bus to get up to full power...without it, your psu may deliver from only 9-11 volts! There are other things you can use as a resistor for this...a car's taillight bulb, a large fan that will run on 5 volts...whatever. It's best to check with a digital meter before you wire it up though.

Happy cooling, man!

 

[krag]

I don't know where there are any close electronic stores nearby so I think I will use a car's tail light bulb. Will a 120mm fan do the same thing? I have several of them. krag

My external psu is a Antec 510w with a 30 amp 12 volt line.

 

[krag]

Scratch the last comment of ignorance. I have purchased a soldering kit, solder, wire, 6volt halogen bulb (in place of resistor) and will slap my stuff together tonight.


One thing I am not clear on, To power the psu which wires do i bridge on the mobo connector? The black and ?????

Also I would like some more info on how to be able to turn on the exterior psu the same time as I turn on my system. Do I just hook up one of the external molexes to a system component?

Thanks, krag

 

[ocean]

Take a look at this

 

[Diggrr]

You need a relay. I use one like in the article myself to turn on my waterpump from the ATX molex.

For switching on another supply, it's nearly the same, but your swapping out the jumper wire for a relay. I attached a wiring diagram for you to use, get the relay from the article Ocean pointed out. (the smaller one is fine too) The diagram also shows the jumper wire positions and wire colors.

The realys shown in the article are 12volt coil/120volt switched , but you can use a foglamp type relay made for 12v coil/12v switched. (5+amps) The first number is the coil voltage used to activate the switch, and the second is refering to the ammount of voltage and current it will switch on and off.

Have fun, man!

 

[krag]

Thanks guys, thanks a whole lot! I am going to assemble my pump and block system and test it tonight. The owens corning silicone has finaly hardened on myh mobo so I can start puting that back together. I am going slow since this is my first water/pelt rig. I might get it going tonight, it all depends on how I feel. I just got home from work. I am running off of my laptop right now. When I get this baby going I will post pics and temps. I am taking the extra time to insulate it really good cause I think I will upgrade to a 226w pelt later. So wish me luck. krag

 

[Diggrr]

No need to hurry, take your time and do it right...and the best of luck to ya!

 

[krag]

Do you think I really need a 1/16th inch neopreme shim ontop of my cpu? It sits up kinda high and I don't want to leave any space for air between the cold plate and the core.

 

[Colin]

You need the shim. Remember to either remove the CPU feet or cut the shim out for the feet.

 

[krag]

Alright if you say so I will put the shim on. I guess it will squish down when I turn the bracket screw, I will be sure and put extra AS2 on the core. thanks bro, krag

 

[craigiz1]

Use caution! Even low voltage halogen bulbs get very hot!
I have a 12v system that lights my home office and it will very much burn you. (I have burned myself) You may not want that in your system!

 

[ocean]

Good luck! Let us know how you make out.

 

[krag]

Well, I got my pump sustem going, it works great. No leaks so far. Man it sure was a drag getting all of the bubbles out of the line!!! There are still some but not very many.Now I am off to the Radio Shack to get the relay!

 

[ocean]

Are you using a reservoir? If you are not, just make sure your bleed is the highest point in the system and make sure you have no "traps" in your tubing. It's really hard to train air to leave a trapped portion of a closed system. It shouldn't take long to get the air out.
I use a res myself, but that's just me.

And that's just another piece of crap in the way.
Check out Hoots system. It's textbook.

 

[krag]

Yeah I am using a aluminum res. Everything is working great so far. I won't put it on my system until I get the relay all wired in.

 

[ocean]

Well then, I don't understand why it is so hard to get the air out of your system. Good luck on the relay project. You must be very patient. My relay is still in the rat shack bag. I have my pump, pelt psu, and heatercore fan hooked up to a powerstrip.
Just hope I always remember to turn everything on/off !

 

[krag]

Man, this sucks! I hooked up everything and it won't post. I soldered the relay on just like the diagram and I plugged in the 2 120mm radiator fans to the exterior psu. THe fans blow backwards and the pelt doesn't get cold. Maybe if I take the relay out and just wire the pelt to the psu (I will have to turn it on seperately).

1. How can the fans blow backwards when they are plugged into the molex plugs? (polarity change?)

2. Radio Shack didn't have the resistor so I used a spare floppy drive for the "dummie load".

3. Computer didn't boot, so I put my HSF on and it works great.

4. Obviously the polarity is backwards, how I don't know. I followed all the diagrams to the tee.

5. I probly will wait for a few days before I try again. I have spent way too much time on this debacle.

6. Any help is greatly appreciated!

Thanks Guys, krag