Pro/Forums - View Single Post - How to turn off comp when there is no flow?

Maximilium · 11-22-2003, 02:07 AM

Hello

For the past month I have been searching the net, I want to build a water-cooling system for my computer (my first water rig).

So far I have been able to gather enough information, and I already started buying the parts.

The pump:
http://www.go2marine.com/frameset.js...egoryId/11659/

The radiators (3):
http://www.dangerden.com/mall/Radiators/hwlabs.asp

The header tank:
http://www.wizarddesigns.co.uk/restanks.htm

Start-up delay (to start pump before CPU after some modifications)
http://www.cooltechnica.com/Merchant..._Code=Electric

Shutdown protector (to keep pump running for 1 min after turning of computer, after some modifications)
http://www.pcmods.com/index.asp?Page...ROD&ProdID=340

The flow switch

The task: Making everything on this list work together.

But there is 1 problem that I have been trying to solve, how make the computer to shut down in case my pump stops working?

Everything was working smooth (inside my head at least) until I found a problem, if I use signal coming from the radiator fan (rpm signal) going by the flow switch when is closed (with flow) and connecting it to the CPU fan @ the motherboard, the bios will detect the signal and it will boot up the system.

But, after the system is up and running and pump fail = no flow = no rpm signal, the computer wont shut down. The only way to monitor the signal and make computer to shut down is with 3rd party software, like MB5, something I don’t want to be using while I am running my com.
So, for the last week I have been trying to solve this problem before I put everything together, the solution maybe simple but I need the know-how, here is my input:

Using the flow switch to activate a 12v relay when there is no flow, this relay will then make the contact between the cables for the power button of the computer, doing this for 4 sec = computer off. After, relay must deactivate to prevent turning the computer on issues.

When I learn how to post pictures I may do a schematic of what I am writing about.

Any suggestions?

11-22-2003, 02:07 AM	#1
Maximilium Cooling Neophyte Join Date: Nov 2003 Location: U.S.A. Posts: 68	How to turn off comp when there is no flow? Hello For the past month I have been searching the net, I want to build a water-cooling system for my computer (my first water rig). So far I have been able to gather enough information, and I already started buying the parts. The pump: http://www.go2marine.com/frameset.js...egoryId/11659/ The radiators (3): http://www.dangerden.com/mall/Radiators/hwlabs.asp The header tank: http://www.wizarddesigns.co.uk/restanks.htm Start-up delay (to start pump before CPU after some modifications) http://www.cooltechnica.com/Merchant..._Code=Electric Shutdown protector (to keep pump running for 1 min after turning of computer, after some modifications) http://www.pcmods.com/index.asp?Page...ROD&ProdID=340 The flow switch The task: Making everything on this list work together. But there is 1 problem that I have been trying to solve, how make the computer to shut down in case my pump stops working? Everything was working smooth (inside my head at least) until I found a problem, if I use signal coming from the radiator fan (rpm signal) going by the flow switch when is closed (with flow) and connecting it to the CPU fan @ the motherboard, the bios will detect the signal and it will boot up the system. But, after the system is up and running and pump fail = no flow = no rpm signal, the computer wont shut down. The only way to monitor the signal and make computer to shut down is with 3rd party software, like MB5, something I don’t want to be using while I am running my com. So, for the last week I have been trying to solve this problem before I put everything together, the solution maybe simple but I need the know-how, here is my input: Using the flow switch to activate a 12v relay when there is no flow, this relay will then make the contact between the cables for the power button of the computer, doing this for 4 sec = computer off. After, relay must deactivate to prevent turning the computer on issues. When I learn how to post pictures I may do a schematic of what I am writing about. Any suggestions? Last edited by Maximilium; 11-24-2003 at 11:26 AM.