Power Supply Tripp Lite APS750??

[BrianG]

There are a few ways to do that with normal PC PSU depending on design:

1: Look for a small PCB mounted pot and make small adjustments to see if it tweaks the voltage or something else.

2: Load down another rail. If this is truly a 12v PSU only, that can't be done.

3: Look for a voltage feedback wire and trick the PSU into thinking the voltage is lower than it really is, so it boosts the output.

[lucias]

Originally Posted by BrianG

2: Load down another rail. If this is truly a 12v PSU only, that can't be done.

What do you mean by load down another rail? I have looked at making my own power supply and when I read the tutorial from my understanding you can combine them to raise the volts or amps if I am reading it right.. but I am probably misunderstanding it...

[BrianG]

Originally Posted by lucias

What do you mean by load down another rail? I have looked at making my own power supply and when I read the tutorial from my understanding you can combine them to raise the volts or amps if I am reading it right.. but I am probably misunderstanding it...

Computer power supplies have a 3.3v, 5v, and 12v main supplies. The PS circuits sometimes measure the current flow of one of these rails to provide regulation feedback. Since all three rails use the same main transformer, when the PSU increases the PWM signal for more power to one rail, all three get a boost. From experience, it just makes the 12v supply more stable, but doesn't help increase the voltage much, but it depends on the design.

The best methods for actually increasing the output voltage appreciably is to tweak a PCB mounted potentiometer, or use the feedback voltage sense wire. But these methods require certain features to be present, and many PSUs don't have that.

[jhautz]

I guess that would require me to break that little seal that says "warrante void if broken" so I'll just use it like it is for now.

Originally Posted by BrianG

There are a few ways to do that with normal PC PSU depending on design:

1: Look for a small PCB mounted pot and make small adjustments to see if it tweaks the voltage or something else.

2: Load down another rail. If this is truly a 12v PSU only, that can't be done.

3: Look for a voltage feedback wire and trick the PSU into thinking the voltage is lower than it really is, so it boosts the output.