- Joined
- Jun 2, 2003
Ive read around that you can drop the voltages on a fan from 12 volts to 7 by connecting the positive lead from the fan to the yellow 12 volt line of the power supply and the ground from the fan to the red 5 volt line of the power supply. Is this correct?
Can this damage the power supply or put strain on it. It seems that the fan will spin opposite direction if you give power to the ground lead and ground the positive lead. So it seems like what would happen if you connected both a 5 volt and a 12 volt is you are getting a "simulated" 7 volt like "effect". But only an effect not a true 7 volts. The 5 volt lead on the ground looks like it would just try and spin the blade the opposite direction (altho loosing the battle with the 12 volt) slowing it down to a certain extent. You are not truely supplying 7 volts.
If i am wrong about this can someone elaberate why this works and if it is safe for the power supply.
Can this damage the power supply or put strain on it. It seems that the fan will spin opposite direction if you give power to the ground lead and ground the positive lead. So it seems like what would happen if you connected both a 5 volt and a 12 volt is you are getting a "simulated" 7 volt like "effect". But only an effect not a true 7 volts. The 5 volt lead on the ground looks like it would just try and spin the blade the opposite direction (altho loosing the battle with the 12 volt) slowing it down to a certain extent. You are not truely supplying 7 volts.
If i am wrong about this can someone elaberate why this works and if it is safe for the power supply.