EEVblog  

WTF! Not so user friendly if you ask me...

Alternatively you can put it in M4. Summon a spirit and then if the stars align you get into m5

tHaH4x0r What was the problem with the old one ? :O

Flofy387 See the video above...

tHaH4x0r Yeah but is it now really short circuit proof ?

Flofy387 I have shortcircuited it often enough and it still works fine. Also, watch the followup video in the discription.

tHaH4x0r Okay. Because I've seen a video where the KA3005P was rapidly shorted, and then it was fucked up :D

They fixed these issues rather quickly. Dave even has an video on the changes.

boriseng That’s not acceptable on a power supply. They design the control law wrong on these things, and it’s very much a noob mistake. Depending on how you set it up, it can get “stuck” at a low voltage, or at the target voltage. The resistance of the interconnection causes this. When you do a solution on paper to a constant power load driven by a cc/cv source, there’s one solution at highest voltage as long as interconnection resistance is

Я тоже считаю, что блок питания тут непричём. Он нагружает его интеллектуальной нагрузкой, которая меняет своё сопротивление управляясь своим процессором. Для чистоты эксперимента он должен был подключить резистор необходимого номинала, и я уверен, что никаких выбросов и ступенек там бы не оказалось. То что он видит на экране осциллографа - это то, как два независимых микроконтроллера подстраиваются друг под друга.

He did not broke it. It only give it a negative feedback =))

Yeah, makes my DMM's go haywire if I leave them in circuit with the PSU after turning it off.

This is worrying actually and makes this a no go if they still act like this.

Josef de Joanelli I know this is a super old comment but.. :D Yes, you are correct, the problem was electronic load going basically short. I'm suprised how Dave did not get this. PSU went into CC showing 5A. Electronic load was also showing 5A. So there was nothing wrong with that.

@@vladan_kovacevic Dave is not that bright at all if you ask me

@@TheMechatronicEngineer I'll keep up the tradition of replying to another old comment, lol. I think he's thinking quick on his feet while on camera, feeling pressure to have an explanation instantly. So he forms opinions very quickly based on a small subset of data. I think maybe his biggest fault is that once he's formed an opinion, he very stubbornly holds on to that opinion even when presented with additional and/or new data that shows that opinion was erroneous. So he's quick to form an opinion and slow to change it. This is normally forgivable, except when he occasionally attacks or belittles someone for having an opinion that differs from his own without recognizing that his position may be in the wrong because he arrived at it quickly with limited exposure to the question. I think he's fairly guilty of this on the podcast.

@@KapitanWalnut Agreed. I remember an obnoxious review of kiCad based on the fact that... he just couldn't use it not knowing it at al... embarassing.

I was just going to say that. Unfortunately the UI is horrible.

Ventsislav Simonov That's exactly what I've got. I've never had any dramas with it.

There's a Off/On switch under UVP switch which you have to turn n manually.

***** I'm getting a Velleman LABPS3005SM, 0-30V 5A. Are they good? It's only 100 bucks, and it's the only PSU you can get for that price here in Sweden :3

SnOpeK Domowei It is the exact same powersupply. I bought it and it is the updated version of the one above. It works a treat and hasnt failed in over two and a half years of service, most certainly worth the money because it is a cheaper powersupply that functions well enough and is linear instead of switching. (lower noise than switchers in the same price class)

M5 is probably accessible. Press M4 and immediately afterwards turn the knob clockwise. Works on clones named KORAD and AXIOMET.

Richard Corfield Not if they were designed competently. A bandwidth limited discrete time controller will act identically to its time-continuous counterpart. Since it’s hard to do perfect band-limiting, usually you oversample enough so that say, a 4th order filter is close enough. Or, in modern circuits, use a sigma-delta converter, since those have very good filters built-in. If you can tell it apart from an ideal analog controller just by looking at the traces, you’re not doing it right. For inspiration on what it means to do it correctly, look no farther than the phone network. Most modems faster than say 4800bps do their work digitally, so there’s one ad/da conversion at the modem, another at the interconnection to the phone network, another at the other interconnection, and another at the other modem. A signal from one modem to another goes through two DACs and two ADCs, and through four two/four wire conversions (those are often done digitally, by duplicating the adcs and dacs to control line voltage and current independently). And it works just fine, and these modems can fully exploit the theoretical bandwidth of the voice circuit. So, uh, it’s only a problem if you do worse than the POTS network does, and that seems like a very low bar to pass.

rageagainstthebath I got the version with the fix too, and it just works. :) I did change the fan though, it was driving me insane.

The 5th memory is used, you hold the 4th and toggle the wheel to access 5.

David Erickson There are the connecting wires, and even a constant power load can have a minimum resistance set (at least good ones do). So no dead shorts :)

Which one did you got? Thank you!

no they haven't, you need to replace some parts to make it bullet proof.

there is a 6A power supply on Ali Express now with a graphic display (like a speedometer etc) for rather cheap.

you cannot use it for 5Amps for more than 5mins

Ah, turns out he did a followup: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_HrvuHSywms.html