12VFB Tap

[CertainBot]

Hello, I have been following your description and I am interested in lowering the voltage of the PSU to 10,3V so I can set 3xPSUs in series giving 31V. I am not sure how exactly did you set up.. One pin soldered to 12VFB (the whiper), another to 12VSB and the last one to GND but did you disable in some way the voltage control potentiometer on the control board or just leave it there.

Alternatively if I want to use 2xPSU for 30V output I have to increase OVP so the voltage per PSU rises to 15V. If I understood it correctly I have to set a low voltage (~2.70V) to the PIC microcontroller pin #5. How did you do that or better where did you take the voltage from? Did you use another potentiometer? Are there any real issues going up to 15V per PSU?

Thanks