I'm trying to assemble a cooling system for me home theater cabinet. I've seen systems consisting of a 120mm 12v fan with a couple of thermocouples, and a power supply. Price is about $300. I'd like to put my own together using computer cooling fans, a controller, and power supply.
I've found the fans, some have thermocouples attached, there's also controllers that allow you to control the speed, temperature via thermocouple. These would typically fit into a computer bay.
I believe the fan and controller use 5 and 12 V. The power supply I found has 5 and 12 V with a 4Pin Mini DIN connector.
The fans and controller use molex and 3 pin connectors, which I assume I can find on the net.
The big question is where does the ground wire come from? Any help on this project would be appreciated.
I've found the fans, some have thermocouples attached, there's also controllers that allow you to control the speed, temperature via thermocouple. These would typically fit into a computer bay.
I believe the fan and controller use 5 and 12 V. The power supply I found has 5 and 12 V with a 4Pin Mini DIN connector.
The fans and controller use molex and 3 pin connectors, which I assume I can find on the net.
The big question is where does the ground wire come from? Any help on this project would be appreciated.