Ah, didn't remember that. Depending on how the load-cell amp and ADC are hooked up this would still be compatible with my narrative thoughAll 3 pedals use loadcells.
Damn, plenty of grunt. Maybe it's just faulty then. (But see below, cos it shouldn't truly matter to any devices.)PSU is an Antec HCP-1200. HCP-1200 is very high-end with OEM Delta parts inside. It's comparable to PSU series like Corsair's top-of-the-line AX and EVGA's G2/P2/T2.
Between CPU and GPU, well over half of the rated power of my 430 W supply. (Possibly a bigger fraction than you were pulling?)How much GPU power was used with your stress test?
Multimeter is probably not needed now that you have clear evidence of voltage droop, but the powered hub will be fun.Multimeter and powered USB hub arrived. Will test in the next hr or so.
Yes, I'd call it a clear flaw. I reckon the pedals shouldn't depend on that voltage being steady (or a 1% voltage variation would make anything more than an 7-bit ADC pretty pointless), and it seems likely that they do. If the powered hub fixes the issue I guess we can feel certain of that.If any drop or rise in 5v rail results in different pedal readings, would you say that's a pedal design flaw (or at least design oversight)? Even of the 5v rail doesn't drop to 4.9-ish V, it'll still drop nonetheless with any PSU (eg. 5.13 V to 5.05 V).
(When I said my supply was rock solid, I meant even less variation than your example - the total range on the +5 V was only 40 mV, with no correlation at all between the voltage and the load and nothing in between 5.04 and 5.08 V; it just flickered between the two now and then, but sat mostly at 5.08. I speculate that (a) my PSU has no coupling between the 12 V and 5 V modules and (b) the voltage readout on my motherboard has insufficient resolution to see (say) 5.06 V... So to be totally fair to your pedals, if my G27 had the same flaw I wouldn't actually notice it given that my +5V line is stable.)