Originally Posted by Systemlord
I'm have been tirelessly working on my build for the last 12 hours, I soldered my MDPC 3-pin connectors to the circuit boards I purchased yesterday and have covered them in 3M's Carbon Fiber DI-NOC! Now before I get ahead of myself here I have Mayhem Extreme Biocide, but don't I need something to prevent that greenish corrosion buildup in my radiators copper and brass construction!
I don't want to run premixed coolant because coolants increase temps, isn't there some sort of corrosion concentrate to add to the distilled water? I'm shocked that no one has developed a corrosion concentrate alongside the various types of Biocide, can anyone recommend such a corrosion concentrate that won't take up to much water volume within my loop?My first ever soldering job on a PCB using my Hakko FX-888, not bad for a first timer! [/B
Warning: Spoiler! (Click to show)
You'll need to either break the tach signal trace after the first fan, or dissconnect the tach lead from the fan connector for all but the one you want to use as an RPM source..
The tach signal on fans is just basically 2 contact closures to ground (optical or magnetic) per revolution.
Whatever device you're using to monitor the RPM, pulls the tach line high thru a resistor, and then counts the times it's pulled low, (goes to ground).
If you connect multiple fans, it'll count a combined number of lows and attribute them to one fan and read wayyy high.
I use circuit boards to break out power to my fans, but I use ones I custom make so that I can use jumper blocks to select either one of the fan connectors on that board, or to get the tach signal from a second board that's designed to be cascaded from the first.
Below is a pic of the board with the traces visible thru it. The upper and lower halves of the board are identicle for the top row of fans and the bottom row of fans.
Assume the left most horizontal connections go to the controller, and the rightmost horizontal connectors go to a second board in a cascade, the jumpers are set to take the tach signal from the left most top and bottom fan connection.
If the jumpers are on the rear sets of pins, then the tach signal is derived from the rightmost horizontal connectors, which would normally be connected back to another board if you're using more than 6 fans per rad. . . although you could run one 480 / 560 fan set from one board.
The di-noc looks nice, but with the pins sticking up, do you have any clearance issues?
That's why I designed mine with all the connectors as "low profile"
Looks like we're both running a similar train of thought here.
DarleneEdited by IT Diva - 1/24/13 at 1:04am