Electronics > Projects, Designs, and Technical Stuff
Chinese 0-30v 3a psu issues
Ysjoelfir:
Is that still the same PSU discussed back in your thread from april?
https://www.eevblog.com/forum/projects/chinky-psu-kit/msg2369598/#msg2369598
m3vuv:
same design but a new unit,seem fine just cant ger any output above 9v.
xavier60:
While an op-amp is in control of a loop, its input pins will measure the same voltage.
m3vuv:
well i removed q1 and tested it,it was sort of leaky in all directions,it now outputs to about 27v,the strange thing is now both the current and volt pot seem to adjust the output,the amp pot seems to vary the voltage less smoothly than the volt pot tho,the cc led is still working but back to a spike on turn off with the cc led lit,starting to tear my hair out with this now!.
m3vuv:
pin 2 of u sits at 7.63 volt in cv mode,pin 3 at 24.75,then in cc mode with the led lit pin 2 sits at 1.042v and pin 3 at 1.032.
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