|Description||Building a small vacuum cleaner from old computer fans!|
We use the San Ace 40 fans, taken from an old server we've got. They have a proprietary 12 pin connector. After further inspection, we found out, that they are actually 4 3-pin Fans.
Here are the pinouts:
|Fan 1||Fan 2||Fan 3||Fan 4|
|Red: +3V||Red/White: +3V||Orange: +3V||Orange/White: +3V|
|Black: Ground||Black/White: Ground||Grey: Ground||Grey/White: Ground|
|Yellow: Tachometric Signal||Yellow/White: Tachometric Signal||Brown: Tachometric Signal||Brown/White: Tachometric Signal|
Sadly, these fans are not reversible, but there is a pin not connected on the PCB, maybe by soldering the +V wire to that pin, we can reverse the fan.
The voltage mentioned in the table, is the minimum voltage needed to start the fan. The maximum voltage is +23V after that, the fan start to lower their speed.