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Yo-DUH_87 · 05-15-2003, 01:01 PM

Ok, I might as well join into the fray

1) Turns peltier PSU, pump, and fans on and off with the PC so that there is no danger of running the pelt without pump.

If you want to use #4, it seems this needs a bit of modafiation. Turn everything but the computer itself on until temps stablise, then allow the computer itself to turn on.

2) Shutdown if temperatures exceed a certain point (the cold plate seems a logical spot to measure to me).

Excuse the ignorance, but what temps are we aiming for here?

3) Shutdown of system in the absence of flow

How would you like to measure this? Bladerunner did an article on flow protection here. Are you thinking a similar consept?

4) A delay for PC boot until the cold plate is cold

I think that the grey wire on the ATX connector is the one we want to look into. A simple extention for the ATX connector could be hacked into submission

The mobo doesn't turn on without the power_good signal, correct? Yet the powersupply will be on. So it doesn't matter if the pelt/fans are on the seprate supply.

Now, let me ask, what do you want to happen if coolant ceases to flow? Should the circuit just kill the mains (120v) feeding the comptuer, or try a soft shutdown? The two levels suggested by ben make sence.

So, a recap.

1. User presses power button
2. Comptuer PSU turns on, actavating relay to turn on pelt PSU and pump
3. circuit automaticaly powers down (hard power down) if flow is not detected (continues to monitor this).
4. circuit begins monitoring temps
5. circuit waits until temp probe reaches x deg C, then gives mobo pwr_ok.
6. Computer powers on.
7. If temps reach above x deg C, circuit attempts soft shutdown.
8. If temps keep rising, citcuit automaticaly switches off mains, and triggers a led indicator so the user knows there is a problem.
9. On shutdown by the user, the relays to the pelt and pump are turned off, shutting down the cooling system with the computer.

Perhaps leaving the watercooling system for a small ammount of time after the comptuer has been powered down would be another feature to add. A suitably sized cap in line with the pelt/pump relays would work (although this would require the fan being on either the pelt PSU or the 5VSB line...

Edit: fixed pwr_ok color

05-15-2003, 01:01 PM	#3
Yo-DUH_87 Cooling Savant Join Date: Mar 2002 Location: Oregon, USA Posts: 230	Ok, I might as well join into the fray 1) Turns peltier PSU, pump, and fans on and off with the PC so that there is no danger of running the pelt without pump. If you want to use #4, it seems this needs a bit of modafiation. Turn everything but the computer itself on until temps stablise, then allow the computer itself to turn on. 2) Shutdown if temperatures exceed a certain point (the cold plate seems a logical spot to measure to me). Excuse the ignorance, but what temps are we aiming for here? 3) Shutdown of system in the absence of flow How would you like to measure this? Bladerunner did an article on flow protection here. Are you thinking a similar consept? 4) A delay for PC boot until the cold plate is cold I think that the grey wire on the ATX connector is the one we want to look into. A simple extention for the ATX connector could be hacked into submission The mobo doesn't turn on without the power_good signal, correct? Yet the powersupply will be on. So it doesn't matter if the pelt/fans are on the seprate supply. Now, let me ask, what do you want to happen if coolant ceases to flow? Should the circuit just kill the mains (120v) feeding the comptuer, or try a soft shutdown? The two levels suggested by ben make sence. So, a recap. 1. User presses power button 2. Comptuer PSU turns on, actavating relay to turn on pelt PSU and pump 3. circuit automaticaly powers down (hard power down) if flow is not detected (continues to monitor this). 4. circuit begins monitoring temps 5. circuit waits until temp probe reaches x deg C, then gives mobo pwr_ok. 6. Computer powers on. 7. If temps reach above x deg C, circuit attempts soft shutdown. 8. If temps keep rising, citcuit automaticaly switches off mains, and triggers a led indicator so the user knows there is a problem. 9. On shutdown by the user, the relays to the pelt and pump are turned off, shutting down the cooling system with the computer. Perhaps leaving the watercooling system for a small ammount of time after the comptuer has been powered down would be another feature to add. A suitably sized cap in line with the pelt/pump relays would work (although this would require the fan being on either the pelt PSU or the 5VSB line... Edit: fixed pwr_ok color __________________ Signing out... Yo-DUH_87 If it works, fix it until it's broke! Then, after it's broke, add duct tape! Affordable webhosting! Last edited by Yo-DUH_87; 05-15-2003 at 01:20 PM.