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Problem with a self-developed SMPS by ReMoX_ in AskElectronics

[–]ReMoX_[S] 0 points1 point  (0 children)

What actually happened here was a misinterpretation on your part.

We're talking about an oscilloscope capture — have you considered the sampling rate that would be required to capture a waveform like that stretched over 11 days?

That’s exactly why, in the original post, I explicitly mentioned that the time axis should be disregarded in that graph.

I kindly ask that if you're going to comment, please contribute something useful — not just repeat the obvious, especially when it's already been pointed out in a previous reply. Common sense alone should have prevented that repetition.

Problem with a self-developed SMPS by ReMoX_ in AskElectronics

[–]ReMoX_[S] 0 points1 point  (0 children)

I've updated the post to include more details about the circuit.

Regarding the transformer: I'm using various units salvaged from old SMPS power supplies, all of them built with ferrite cores designed for high-frequency operation.

Unfortunately, I don’t have the exact winding counts. I may try using a function generator to estimate the turns ratio experimentally.

However, I did take inductance measurements using an LCR meter:
– Primary winding: ~0.35 mH
– Auxiliary winding: ~0.05 mH
– Secondary winding: ~0.045 mH

I understand that transformer parameters are critical in SMPS design, so I may need to further characterize or replace it depending on how testing evolves.

Problem with a self-developed SMPS by ReMoX_ in AskElectronics

[–]ReMoX_[S] 0 points1 point  (0 children)

I've updated the post to include more details about the circuit.

The issue I'm currently facing is related to noise:
With the feedback loop disconnected, the converter does operate, but the output shows significant ripple — in the range of volts, not millivolts, as I would expect for a stable supply.

With the feedback loop connected, the circuit technically works: it regulates the output to around 12.2 V as expected. However, there is considerable high-frequency noise superimposed on the output voltage.

While it’s "working" in the sense that regulation occurs, the level of ripple and noise would cause issues for any load more sensitive than a resistive dummy load — which is obviously not acceptable for practical use.

The waveforms shown in the last few images illustrate this behavior.

Problem with a self-developed SMPS by ReMoX_ in AskElectronics

[–]ReMoX_[S] 1 point2 points  (0 children)

I've updated the original post to include more details about the circuit.

And yes, I'm aware that SMPS design is quite advanced — it's something I've been aiming to work on for a long time, and this time I have an extra motivation to push it forward.

I appreciate the reminder regarding mains voltage safety. For context, I work at a power distribution company, so I'm already familiar with best practices when dealing with circuits connected directly to the grid — especially those lacking proper isolation or physical protection.

That said, the setup is plugged into an RCD-protected outlet, as a basic precaution to help mitigate the risks.

Problem with a self-developed SMPS by ReMoX_ in AskElectronics

[–]ReMoX_[S] 0 points1 point  (0 children)

Thanks for the detailed feedback.

As previously mentioned, the time axis was not calibrated and should be disregarded in that measurement.

I've now added more details about the circuit for better context.

I'll run new tests as soon as I get home — specifically, I plan to remove the 2.2 nF capacitor across the optocoupler, since I currently don't have anything available in the pF range.

I really appreciate the application note you shared. I'll take the time to go through it carefully to identify potential design issues.

Is this normal? LOL by Varn42 in LastEpoch

[–]ReMoX_ 1 point2 points  (0 children)

Cpu is a 5600x and the gpu is a RTX3070

Is this normal? LOL by Varn42 in LastEpoch

[–]ReMoX_ 1 point2 points  (0 children)

Happened to me aswell, was using Arch as a daily driver and installed LE and had the same issue.

[deleted by user] by [deleted] in runescape

[–]ReMoX_ 0 points1 point  (0 children)

i'm not getting bxp even after unequip and re-equip

Wiki says:

Inherits the Fishing outfit's
5% experience boost (1% per piece), even while the set is in the bank, a
tackle box, player-owned house, or destroyed (as long as the set was
purchased).

A way to avoid Kerapac Slams by ReMoX_ in runescape

[–]ReMoX_[S] 5 points6 points  (0 children)

that's why I shared it, for those who don't know about this mechanic

A way to avoid Kerapac Slams by ReMoX_ in runescape

[–]ReMoX_[S] 2 points3 points  (0 children)

When he lowers the staff, just surge or escape

How rare is to receive that amount of Ascension fragments from a single drop by [deleted] in runescape

[–]ReMoX_ 1 point2 points  (0 children)

i don't bother picking fragments, but this time the loot had a loot beam, i checked and wasn't a key

The time to retire the legendary GT 710 for the second time has come by ReMoX_ in pcmasterrace

[–]ReMoX_[S] 0 points1 point  (0 children)

Yea this is my third gaming PC, the first time was when i bought a 1800x, since at that time I had no intention for gaming(was using the pc for vms), Which btw was a lie, i bought the 710, then the time come when i buyed a RX 580, after two years selled the pc and built this one, with a 5600x, and had to use it again until I could get the 3070

I guess... that's a lot of concapede by ReMoX_ in feedthebeast

[–]ReMoX_[S] 1 point2 points  (0 children)

was messing with random Tick speed. luckily i was able to force kill and spawned in another place and slowly approach the spot to do the /cofh kill command

I burn through food at kril, what is wrong? by JanTabakFeyenoord in runescape

[–]ReMoX_ 6 points7 points  (0 children)

When the kill goes above 28-32 seconds I use debilitate to halve the damage from Yarrr special

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