Digital Doc Fan Control

[Gozma]

The digital doc can control up to 8 fans i think.... how does it control them? Do i have to get fans with variable speeds? or does it control it just by adjusting power?

[ptcg]

It doesn't adjust the speed at which the fans moves.. It just turns them on/off at a whatever temperature you set it to.

Each fan is connected to the same # temp probe.

For example, if fan #1 is set to 40C, when temp probe #1 reaches 40C, fan #1 will go on.. when it falls to 39.9C, it will go off again.

The only problem with this setup is that the fans can sometimes go on/off repeatedly as the temp 'flickers' around the target temperature.. Kind of annoying actually.

[Al666]

You can actually add a relay switch to DD5 and it will automatically switches from 7V to 12V.
www.cooltechnica.com is giving the relay switch option when you purchase a DD5 from them.