Running a pump using 7V molex mod
Posted: Sat Jan 12, 2008 6:43 pm
I'm currently using the Laing DDC pump from Petra's Tech.
It was a little too loud on 12V and the humming noise overpowered everything else in my case. So I changed around the molex connector pins to give me 7V. However, I was wondering 2 things:
1. Is this bad for my pump or power supply? I'm not clear on the specifics, but I think there was something bad about applying too many amps across the 12V and 5V lines like this.
2. Of course, the pump will have a lower flow rate. However, is it possible to have a pump run so slow that it can no longer can circulate water through the system? To clarify, I'm wondering if water will still be circulating through a closed system given a pump spinning, no matter the speed, or if there's a point at which the pump can no longer compensate for water resistance.
It was a little too loud on 12V and the humming noise overpowered everything else in my case. So I changed around the molex connector pins to give me 7V. However, I was wondering 2 things:
1. Is this bad for my pump or power supply? I'm not clear on the specifics, but I think there was something bad about applying too many amps across the 12V and 5V lines like this.
2. Of course, the pump will have a lower flow rate. However, is it possible to have a pump run so slow that it can no longer can circulate water through the system? To clarify, I'm wondering if water will still be circulating through a closed system given a pump spinning, no matter the speed, or if there's a point at which the pump can no longer compensate for water resistance.