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We want DC power! For Neopixels, for example. Or for battery charging. Or for radio stations. Our power supply has to be strong and stable. Strong means in this case: More than 60 amperes at 12 volts or so. And, these days, it also has to be good for the environment. But it should cost less than 20 dollars. Including shipping. Unbelievable? That is what I thought, too. Till I discovered second-hand server PSUs
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German video about PSU electrical noise and its removal: • Video
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2 окт 2024

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Комментарии : 1 тыс.

@d3vastat0r89 4 года назад

Lol this dude is a savage. "Film your endeavor"

@AndreasSpiess 4 года назад

It was just a tip ;-)

@k1zmt 4 года назад

He just has a good sense of humor.

@kalifack 4 года назад

Yeah laughed so hard. I love electroboom :D. I think he explodes more Capacitors than anyone in youtube :D.

@PeterMilanovski 4 года назад

Well if you are going to end it all, you might as well video it and eventually become a meme to be remembered for ever LoL.

@koma-k 4 года назад

@@kalifack in eighth grade I had "physics workshop" as an optional subject, and the teacher's top two favourite things to do were to blow up capacitors and to throw bits of sodium on the ice outside in winter. Electroboom will probably have to keep going for a few more years before he passes that teacher's capacitor kaboom count 😉

@SwitchingPower 4 года назад

Instead of using the analog pin to get the output current you can use the pmbus to get all of the measurements out of the power supply like input and output voltage, current and power, fan speed temperature and a whole lot more.

@AndreasSpiess 4 года назад

That is what I thought. But I did not find a readymade Arduino project.

@getyerspn 4 года назад

Good man ..I've been doing this for many years ...I have a 4 draw filing cabinet full of used Siemens/ Fujitsu/ dell/ hp and so on server psu's all 100% free.. most companies have to pay to have these disposed of as wee waste in the UK so are most happy for me to take them... I've gotten a bit of an obsession with collecting free psu's .

@AndreasSpiess 4 года назад

Cool. It was new to me. In my profession I consume lots of CPU power, but did not think about what they do with the HW :-(

@Arek_R. 4 года назад

Where in UK you get these for free?

@getyerspn 4 года назад

@@Arek_R. I'm an electrician I work in a lot of large factories all of them have a weee bin .. they're all happy for me to take parts as most weee waste management companies charge by weight and the psu's are quite heavy...I have loads and loads of them all of my large ws2811 projects use them ...much better than cheap unknown quanlity psu's from China... I've only ever had one ex server PSU die on me.

@Electronics-Rocks 4 года назад

Problem is big IT companies have a policy of must to go to a scrap yard to be total dismantled and I have seen piles of them even offered to pay but was refused. I did have more luck while working at a factory and the IT company just used the wee skip onsite where I picked up screens and a printer. The PC's had HD removed.

@Arek_R. 4 года назад

@@getyerspn If I would have access to this bin I probably would end up with with few tonnes of these. Though even if would have no purprose for these myself then could sell them on ebay for some low price so other people can have these as well.

@cbrightly 4 года назад

Also worth a mention: Regardless of how dust-free the fans are, please consider that server PSUs (and their very loud and exceptionally fast-running cooling fans) may have been running for many, many hours under heavy loads. Time to failure, and the type of failure that eventually befalls your unit, will likely vary greatly when using used server power supplies.

@AndreasSpiess 4 года назад

Well possible. But thousands are used right now. This is not a new idea.

@AjinkyaMahajan 4 года назад

Dishika is on power-saving mode 😁 and reboot can consume a lot of power.

@AndreasSpiess 4 года назад

:-)) She is quite easy to reboot if she is hungry ;-)

@visitslovenija 3 года назад

Hi Andreas, Having seen your video, I decided to get hold of a few of these supplies. Looked like really nice kit! I wanted to mod them for 13.8v to use on my radio gear, so followed the most popular route, shorting out a resistor on the trim pot. Worked fine....or at least it did until I tried to put a decent load on the supply (20A). This caused a loud buzzing and ripple on the output. It would work fine at 13.4v (well over 20A in fact), but going above 13.5v caused this instability. I have two of them that both behaved the same, so don't think this a fault on the supplies, but a design issue. My gut feeling was that it was due to an over-voltage protection tripping early, though without any schematics, hard to be sure. However, I tried tweaking other trim pots on the control board (marked their position first of course) one at a time and found one that influenced this behaviour. So with a slight adjustment on this pot, I now have 13.8v set and can go all the way to 30A. Nice. Ok, I'm working blind here with no diagrams, but it does make sense. My guess is that they are specified to pretty tight tolerances and so can see that over-voltage migth be set to say 14v or 15v, in which case 13.8v is getting kind of close. Anyhow, I know you were staying clear of advising details of this mod, but thought this might still be useful. Br, Ralph

@AndreasSpiess 3 года назад

You are right. They have an overvoltage protection. In your case it was very low. Usually they kick-in at 14 volts.

@PHamster 4 года назад

**Waits for ElectroBoom** **EEVBlog walks in first**

@zvpunry1971 4 года назад

And after Dave explodes a capacitor, Mehdi comes to tell you about the giant TV he found in his dumpster room.

@mullervolker9814 4 года назад

EEVBlog has Nighttime now.

@raguaviva 4 года назад

@@mullervolker9814 EEBLog is a nightmare, too much talking for me.

@thebeststooge 4 года назад

You had me in stitches with this one. Well done.

@AndreasSpiess 4 года назад

Glad you enjoyed it

@ShaunakDe 4 года назад

I need a "in HP we trust" tattoo.

@AndreasSpiess 4 года назад

:-))

@Ferraday 4 года назад

Damn it, every time someone spreads the word, I lose more and more $5 800W psu offers

@excitedbox5705 4 года назад

That is the problem every time someone shares a great deal on youtube. soon after it isn´t a deal anymore. Right now so many servers are being consolidated though because of Epyc that there will be millions of these. You can replace 6 or more servers with one 32-64core epyc cpu and the energy savings pays for the upgrade within 2 years so it is a no brainer.

@AndreasSpiess 4 года назад

@Philosophical Thoughts: I hope you have already bought a few of them ;-)

@icghost2 4 года назад

LOL we're all a little late to the party on this one! These have been around for some years now on the used market - i bought 4 1100w units 6 months ago for 60.00 shipped only to discover years of mention on RU-vid. These are even stackable through an inexpensive connector for 2200w 24v. They are available in droves and the frequency of units is increasing, I can only assume the designers anticipated a secondary market use and deserve a pat on the back!

@stewartrv 4 года назад

Actually the RC guys have been doing it for years and use them to charge up lithium packs so if it was going to make a difference I'd say it has already. Also best source of mods on their forums.

@Ferraday 4 года назад

Nojoke I just lost three offers I was gonna get for $3 psus in a single day after this lmao. Someone bought out an entire seller’s stock of like 60 on eBay

@rhiantaylor3446 4 года назад

Server PS will also have excellent power factor.

@AndreasSpiess 4 года назад

Thank you for the addition. I did not look at it.

@seanflanagan5674 4 года назад

@Arpad Toth, please elaborate: it is not clear to me what you mean by 'domestic use' and do not understand why it would result in higher cost.

@suromark 4 года назад

@@seanflanagan5674 It should not increase cost. Depending on the meter being used, it may well reduce cost. Bad power factor means more current flowing back and forth along the AC line in relation to actually consumed power. Power factor close to 1 means "what flows is actually used". Classic counters ("ferraris" type) measure the power used. Modern digital counters measure absolute power flowing. So let's assume we use 200 W (from a 750 W power supply, but that doesn't really matter). At power factor 0.5, there's 400 W going back and forth. At power factor 1, 200 W are going back and forth. An analog counter will only see 200W no matter the power factor. A smart meter will be able to see either 200 W at PF 1 or 400 W at PF 0.5. Depending on the utilities contract, we might get billed for the absolute or used power.

@seanflanagan5674 4 года назад

@@suromark, thank you for the explanation, for which I'm grateful. But the enlightenment leaves me upset: in my area, the consumers were required to pay for the installation of new "smart meters"-which only the power company can analyze and control. And I don't know how they calculate usage though I suspect….

@vk3fbab 4 года назад

Yes some even have active PFC where the MCU controls the current draw to keep it in phase with voltage. Server PSUs have it all! Most good ones use MOSFETs for the bridge rectifier to save power. Great engineering in the brand names.

@excitedbox5705 4 года назад

You can also find 24v and 48v server PSUs. A desktop power supply just needs a 5 or 10w resistor hooked to the 5v line and to ground so adding a power switch is easy. A server psu usually needs a resistor too but usually has a power enable pin. You can also get a whole server for very cheap and use it for a project like a cnc, automation control server or a media center. I have seen 12core servers with multiple TB of storage for 100-200.

@AndreasSpiess 4 года назад

Cool. I have to watch out for that.

@NiHaoMike64 4 года назад

48V PSUs are more commonly known as "telecom rectifiers" and are of particular interest to those building large audio amplifiers. Then there are hybrid car inverters for truly large amounts of power.

@christopherj3367 4 года назад

great sense of humor, and the cats a bonus.

@ahothabeth 4 года назад

I do wonder about electro-static discharges with cats.

@kitecattestecke2303 4 года назад

@@ahothabeth if you run hard on their fur you can use them as a high voltage powersource

@Vitaliuz 4 года назад

Indeed!

@pd8559 3 года назад

Recycle those laptop power supplies too to keep them out of landfills. I have a couple Toshiba laptop power supplies I cannot use as I don't have the old laptops anymore. They are or were at the time all made to output 19volts and about 4.7 or 5 amps. That will be about 18 amps at 5 volts or so and if you stick one of the Chinese digital buck converting power supplies on one you'll drive them to the buck converter current limit with plenty of room to spare in the laptop power supply. Mine are so old they are from another country but I have some power plug adapters for them kicking around. My Chinese digital buck converter has three separate inputs on the back and one of the three is a barrel connector that first the Toshiba laptop plug exactly. (yes I finally made it to your PC power supply video! \o/ yay)

@ahaveland 4 года назад

I already found these a couple of years ago and bought a few for charging my multi kWh lipo packs. Note the connector is heavily gold plated copper, so it's a pity to solder to it. Would be nice to be able to collect the gold first before soldering to the copper underneath!

@benbaselet2026 4 года назад

The film is really thin though. You'd only get a fraction of a gram. Playing with junk channel guy harvests loads of these gold PCB parts and has a video about harvesting the gold.... can be worth it if you come across loads and loads of expensive stuff with a gold finish I guess.

@AndreasSpiess 4 года назад

@Andy: I posted a link to a connector board.

@ahaveland 4 года назад

@@AndreasSpiess thanks Andreas, I had a look... it creates more problems with needing more 6x2 connectors! I would just need the edge connector itself then distribute a 10AWG cable to each of the main outputs and terminate with an XT90 or 6mm bullet connectors for series connection. No need of the other pins. I isolated one PSU to make 24V, and it worked for a year but now won't power up. There's probably a simple fix, but I don't fancy poking around inside it to try to find out why!

@AndreasSpiess 4 года назад

I ordered those: www.aliexpress.com/item/33029711948.html But I do not know if they will work.

@ahaveland 4 года назад

@@AndreasSpiess Would really need to identify the type used in the server they came from. The connector on the breakout board is 64 way or 32 pairs. I ordered too... should make it easier to exchange psus if one fails, but tedious making a loom for it!

@sincerelyyours7538 4 года назад

I've had three HP 1200 watt 12V supplies for the past 5 years and use two in series to power my 24V Li-Ion battery charger. Note that if you put them in series, one must have its DC ground isolated while the other retains both its AC and DC grounds. Otherwise you'll get sparks if the metal cases come in contact with each other and possible internal damage as well. As these are SMPS supplies they can accept AC inputs anywhere from 100V to 240V, but you won't get maximum current out unless you power them with 240V.

@AndreasSpiess 4 года назад

True. I saw that people took away the cases to avoid sparks in serial combination. Maybe not a good idea... Better to use your proposal.

@Ownedyou 4 года назад

Upcycling! Really good use of the hardware, I approve.

@AndreasSpiess 4 года назад

Hey, thanks!

@TheEmbeddedHobbyist 4 года назад

Thanks for the heads up, never thought of looking at these power supplies. I have used a 12V computer power supply(linear) 15A which is very heavy but was built to last at full load. I expect theses are the same, built to provide 60A 24/7, Just got a 100W HF rig, so ordered one to free up the 30V 30A variable supply i'm currently using. Now to try and not do an electroboom and convert it to 13.8V

@AndreasSpiess 4 года назад

I had less than 10 minutes for the 13.8 volts conversion. Pay attention. It can hurt ;-)

@TheEmbeddedHobbyist 4 года назад

@@AndreasSpiess I can see it's just a mater of finding the correct resistor in the feed back path to adjust the output. Might also be a mater of finding the overvoltage trip circuit to stop it tripping if 13.8V is too close. My linear supply had a trip that would trip at 13.9V and crowbar the output, before I found this out, the supply would trip once a day at 23:00hr when the heating turned off next door. increase the trip to 14V and it never tripped again. I hope these turn out to be as stable. A HF Rig that that I'm working on has 900V DC on the Anodes so I'm used to keeping one hand in a pocket when the PA screen in off :)

@AndreasSpiess 4 года назад

One hand in the pocket is very good advice!

4 года назад

I would be really cautious with switch-mode power supplies, even of server quality. For HF use, if you're unlucky and hit some harmonics and intermodulations, your signal can get pretty ugly. I wish you luck with your PA and HF endeavours. Hope you'll report back with the results! I subscribed to your channel. 73 de OM2AGC.

@zapador 4 года назад

Great tip! Just grabbed 4 of them on eBay shipped from the UK, total 48£ shipping included.

@fuzzy1dk 4 года назад

not a big issue for a diy project but edge connectors have thick gold plating, not the extremely thin ENIG. When soldering to it enough gold might dissolved in the solder to make it brittle

@AndreasSpiess 4 года назад

Interesting. I did not know it. Thanks.

@fuzzy1dk 4 года назад

@@AndreasSpiess www.eptac.com/j-std-001-revision-changes-regarding-the-requirements-for-gold-plating-removal/

@download333 4 года назад

This seems like it would be ideal as a 3D printer power supply

@shadow7037932 4 года назад

Not quite. Most have switched over to 24V. 12V is still used in some printers but a vast majority of them are 24V now. Plus even with a high current PSU like this the 12V 3D printer main boards will be limited by the MOSFETs.

@AugustoZanellato 4 года назад

Isogen just connect two of them in series then. You’ll need to insulate 3 screw+stand-offs inside the psu

@milesmccoo 4 года назад

@@AugustoZanellato does that work with all switchers?

@mich29sm 4 года назад

@@milesmccoo Unfortunately, not all. Some will do. There are some constraints and warnings when trying to connect two PSU in series: 1. To do in-series connection you must ensure (at least one) power supply is floating (ideally both), i.e. none of the DC outputs are common to any of AC inputs PINs. 2. There is a chance for non-equal rising time, especially when the PSU's are not the same, causing ramp-up to be non-linear, sometimes this may be a problem for connected devices (it may be sorted using additional circuitry). 3. In case of short circuit (yeah ElectroBoom) effectively you have two PSU connected in reverse. Not very safe.

@scurvofpcp 4 года назад

@@mich29sm I just decided to use dc to dc converters and a modest secondary battery bank rather than do a float.

@ytteman 4 года назад

You should add a freewheeling diode across the relay coil

@AndreasSpiess 4 года назад

True.

@typxxilps 4 года назад

SOLD OUT ... looks like you had sold his 340 units today I guess.

@AndreasSpiess 4 года назад

I do not know how many you ordered. But it seems there is ample supply.

@typxxilps 4 года назад

@@AndreasSpiess none, that's why I replied cause I'd been too late

@jort93z 4 года назад

There are so many on ebay. www.ebay.com/itm/392596821020 www.ebay.com/itm/392596822386 www.ebay.com/itm/333113936450 www.ebay.com/itm/293280214686 They have to dump their old psu's somewhere.

@tazman4855 4 года назад

I've been using several old laptop power supplies ~20V/8A. It's nice and quiet, and no fan to fail. The server power supplies, or even network gear, aren't as reliable as before. They don't even have protected metal covers anymore. Many of them are just piece of cardboard. Also they don't need to be as reliable as before because there can be more than 2+ of them now. So we have them failure every wk. Meanwhile hardly a PC ATX power supply fails or laptop.

@AndreasSpiess 4 года назад

I did not find a lot of complaints about failing PSUs. And thousands are used for years by the RC community. Laptop PS are also a good choice for lower power applications. I use one for my mobile PS.

@ganon4 4 года назад

Make a video "How to power up your Raspberry pi 4 cluster with cheap DC power" => Conquer RU-vid. Thanks for the video :D

@AndreasSpiess 4 года назад

I am not too much interested in Pi clusters for the moment :-( My Pi4 is strong enough.

@tbbw 4 года назад

The RC scene has been using these server psu's for years to power lipo chargers for their cars and such :)

@AndreasSpiess 4 года назад

True. As well as the bitcoin community. But I did not know it :-(

@NiHaoMike64 4 года назад

Also popular for use on the CR-10 3D printers.

@shenqiangshou 4 года назад

love the shout out to electroboom! haha!

@AndreasSpiess 4 года назад

:-=)

@koma-k 4 года назад

Thanks for the warning about PSU capacitors... unfortunately you're about 30 years late 😉 The one time I got a (close to) mains voltage shock was when I was troubleshooting a PSU for an Amiga 500... for a second I forgot about the cap and placed my thumb squarely across the solder points on the rear of the PCB 😂

@SianaGearz 4 года назад

Indeed too late. I think just about every reasonable PSU made today has a mandatory discharge resistor across the painful primary side caps. Because when you unplug a device, you are confronted with exposed power plug pins, and you could potentially touch them and have a bad time. One side of the capacitor would be effectively across both live/neutral pins and the other potentially on the ground pin. Of course depending on your amount of luck, precaution is still advised, because sometimes these discharge resistors could be missing or could delaminate from heat and become ineffective.

@AndreasSpiess 4 года назад

@ Siana Gearz: I thought this, too. But I can tell you: The depleting in mine is not very fast if you know what I mean ;-)

@NautilusCL 4 года назад

I have a pair of these power supplies, i use one for my radios here on my shack, the HF transceiver drawn about 20A peak and the PSU dont even sweat, they are very good. I mounted one on a "aluminium" style suitcase, with space to carry my HF transceiver, so i use it for transportation and field power supply. They are very RFI quiet also, i have not detected RFI from it on the HF bands, only a little on VHF, but maybe a good ferrite on the AC input cable will filter it.

@TheEmbeddedHobbyist 4 года назад

Just ordered one for my HF rig, once converted to 13.8V.

@AndreasSpiess 4 года назад

Here is the video to make them quiet (in German)

@GrandpasPlace 4 года назад

This looks like a great power supply for those lab bench top power supply display things you get from aliexpress. Would add adjustable voltage and amperage to the unit.

@AndreasSpiess 4 года назад

Good project!

@RomanoPRODUCTION 4 года назад

Thanks, now I can make a 12V oven for my 3D printer 😂

@AndreasSpiess 4 года назад

Have fun!

@beauregardslim1914 4 года назад

I've used PC power supplies in the past, but this is a great idea for higher quality supplies. Is there a cross-vendor standard connector/interface on these? As always, an interesting, informative and very useful video.

@AndreasSpiess 4 года назад

I do not know if it is cross-vendor. At least it seems to be a HP standard.

@mannhansen9337 4 года назад

I can still remember the power supplies used in DEC VAX computers, they were 5V @200 A. This was around 1990.

@firstmkb 4 года назад

Damn, I could use one of those for an electrolysis project!

@AndreasSpiess 4 года назад

I never investigated it when I sold them as a DEC Account Manager;-)

@luigimantuano9383 4 года назад

@@AndreasSpiess Ah! DEC!! Love of my life.. 19 years at DEC, Milano first then Melbourne, mainly Field Service and Sales Tech Support.. Were you in Geneva? Did a few trips there for FS Support meetings. I do have a number of these PSUs, started modding them a couple of years ago, taking hints from an RC website/forum. Also recently picked up a SUN/Oracle PSU with dual 12V 240A..! Pity haven't found any info on the small connector and its many tiny pins..! Love the stuff you're doing. Tschuss, lm

@duotronic6451 19 дней назад

Wow. You jogged my memory. Database software developers had me install windows 3.51 on a dec alpha in the late 90s. Learned a lot.

@SrikanthBhospet 4 года назад

Mr Andreas, you look like super geek in this area. please make all the videos including charging a battery and how to charge a phone using 18650 batteries and so on..... Subscribing now...

@AndreasSpiess 4 года назад

Welcome aboard the channel! Maybe you go back in my videos. You should find some stuff concerning batteries.

@flos251 4 года назад

Nice video. I have a question about the psu: what is the standby power consumption with no load?

@paulham 4 года назад

Interested in this too

@Ferraday 4 года назад

I’ve got a stack of four server PSUs and on standby they generally have a low power fan running and after about 10 minutes the air being blown out the fan can be like 90° (ofc it could just be heatsinks retaining huge amounts of heat

@cyber_guerilla 4 года назад

Philosophical Thoughts wow Your house must be very warm even in the coldest winter

@AndreasSpiess 4 года назад

Mine uses 12 Watts

@Rob2 4 года назад

@@AndreasSpiess Ah thanks, I asked that in another reply too. The one I tried was over 40 watts, I did not want to use that as a station supply that is (nearly) always on, now use one of the wellknown 13.8V/23A boxes. Ok no 60 A :-)

@raguaviva 4 года назад

The EEVBlog is shooting the same type of videos over and over, there is just too much talking, and he keeps on discrediting cheaper products in favour of those expensive for big brands, even if 99% of the people don't need them. On the other hand Andreass is talking about what most people care, and I don't know how he does it but he always comes up with new and interesting stuff!

@DonUSRoyce 4 года назад

I agree with both of your statements, Andreas Spiess videos are infinitely more usable and valuable for the DIY'er. IMO

@AndreasSpiess 4 года назад

Different channels, different viewers ;-) I try to stick with what I like most.

@Sliceoflie 4 года назад

Great video! I looked into doing something like this last year with a spare consumer PC PSU I had laying around. I also wanted to modify the voltage to be 13.8V for radio use and looked into tutorials on the process. However in nearly every one I found, making the modification either bypassed or otherwise removed almost all safety features such as under/over voltage and short circuit protection. That alone made me not want to make the modification, but then I took a closer look at some other parts in my particular PSU. Some had absolute maximum voltage ratings of as low as 14V, which I felt was way too close to 13.8V to have any safety margin. So instead it remains a 12V powerhouse for LEDs and charging other devices using buck/boost converters.

@AndreasSpiess 4 года назад

You are right: They are made for 12 volts. But I found many examples where they were used on 13.8 volts. So I assume they are also safe to operate at this voltage. But I have no long term experience

@hacKnosis 4 года назад

Instant suscribed! Great content man.

@AndreasSpiess 4 года назад

Thank you!

@willannison1300 4 года назад

These are fantastic I use them for powering rc lipo battery chargers. I also have 2 of these connected in series for 24v 62A power!

@grindel80 4 года назад

is this possible without danger @Andreas Spiess

@Ferraday 4 года назад

Frank Müller besides ground connection issues, they are totally fine

@kitecattestecke2303 4 года назад

@@grindel80 no you have do disconnect the shell from the ground output because if the case touch each other they go bang..

@cheetahkid 4 года назад

@@kitecattestecke2303 Yep silly me, and a lick of flame came out of the case AND damaged the switch on the main household socket too.

@Rob2 4 года назад

@@kitecattestecke2303 Of course when the output is not floating and cannot be made floating (check the PCB), it is not enough to disconnect the shell... they will still connect via the mains safety ground. When you want to so something like this you have to understand what you are doing.

@bctechmalayalam5391 4 года назад

Please make a video on how to make a variable linear laboratory power supply

@AndreasSpiess 4 года назад

This is not my specialty. But I am sure you find open source projects.

@nayefhaidir 4 года назад

*1 Week Later* Price Increased :D

@AndreasSpiess 4 года назад

Maybe already today. That is why it is good to be subscribed;-)

@ScottRipley 4 года назад

@@AndreasSpiess Been buying the platinum version for about 8mo for $12.50 shipped, and already $28 when I looked today.

@ragilmalik 4 года назад

i love the secondhand server market. Bought 5 240watt Dell server psu with 20 pin mobo connector for only..........yes, 3 dollars each. 3 dollars. Very dirty but i checked every component and they're still very good. I then bough dual 20 to 24 pin (2 psu(s)) to connect the psu(s) to atx mobo and made a low end gaming pc for my son. Not to mention i also purchased 2 2TB WD black for $10 each, a huge server heatsink (twice the size of 212 evo, modify it to fit on am4 motherboard) only for $5. Damn server market.

@AndreasSpiess 4 года назад

Fast moving electronics. Nobody wants old things anymore, I think.

@Aemilindore 4 года назад

Thubs up this comment to demand an electronics video with Andreas's wife. Bring her in!! Bring her in!

@oniruddhoalam2039 4 года назад

Andreas probably got divorced from her.

@AndreasSpiess 4 года назад

I am happily married. Bu she does her thing and let me do mine ;-)

@Aemilindore 4 года назад

@@AndreasSpiess haha no problem. Some other day then..

@Arek_R. 4 года назад

RC model makers were using and modyfying those server PSU long time ago for power hungry li-po chargers. A lot of reverse engineered info can be found on rcgroups.com If you need 15V I was able to hack DPS600PB years ago and I published some pictures as Doctore on this website about that.

@AndreasSpiess 4 года назад

That is what I learned during my investigations. For me it was new. Thank you for the link.

@dolandump 4 года назад

He wanted to be like ElectroBoom xD

@AndreasSpiess 4 года назад

:-)

@silvio2402 3 года назад

Oh no, they do not ship to Switzerland (anymore?) Or did you ask for a „postage quote“? At least the one from the link in the description says it does not ship to Switzerland when trying to buy.

@AndreasSpiess 3 года назад

I have a shop at the German border where I get my eBay things (by bicycle). Many shops do not deliver to Switzerland :-(

@rudyvk 4 года назад

Done that a few years ago. The RC community also seems to like them. Great, robust PSUs. Only downside is that they do produce some RF noise, so not too great with radio transmitters.

@AndreasSpiess 4 года назад

A German HAM did the investigation and remedy of the RF noise. I put the Link in other comments.

@Stefan_Van_pellicom 4 года назад

Hey, that’s a GREAT tip ! Thanks !

@AndreasSpiess 4 года назад

Glad it was helpful!

@craiglarson2346 4 года назад

Cute @2:48 "Please Subscribe!" Is it possible that you have viewers that have not YET subscribed - let alone set up a Patreon account? Hard to imagine what keeps people waiting - unless they are young students just discovering your quality/quantity. Electroboom @ 3:16 - good warning. I'm a big fan of Mehdi and yes, I fear for his survival but am simultaneously thrilled by his videos. Ever notice the carbon burn tracings on his project boards? Those sparks are real. Switching with an ESP-01. Perfect. I'm working on that right now using a 5V relay - Yes, 70 mA is what my 5V OMRON G2RL-14 uses. I supplied it with a 2N-3904 transistor and the base supply is GPIO00 off an ESP-01. I may flirt with the 13.8 V idea. A 12 V lead-acid off the grid lighting system would be a really application of these power supplies. Recharging the batteries without 'the grid' would be pretty fundamentally necessary. Maybe isolating the charging station to a box outside of the building would be the safest thing to do... just in case. Same is probably true for LiOn battery charging - I saw your warning about that and now practice supervised charging only ever since. Enough of my blather. Thanks for another fantastically timed video. I need to watch a few more times to absorb it all.

@johndododoe1411 4 года назад

That switching on/off should be done with a transistor, not a relay, as the PSUs expect that.

@deadbird99 4 года назад

I found it disturbing that you didn't mentioned the fact that these puppies make the sound of an helicopter when turned on, and that most hacker try to control the fan first when modifying such a PSU ^^

@AndreasSpiess 4 года назад

Actually mine is quiet. So probably I was lucky

@deadbird99 4 года назад

@@AndreasSpiess I confirm you're lucky. I can't stand close to mine for more than a minute...and disconnecting the fan obviously puts it in fault mode 😭

@McTroyd 4 года назад

"In HP We Trust." As an HP shareholder, I approve of this message. 😁

@luclu7_ 4 года назад

HP or HPE? :P

@AndreasSpiess 4 года назад

Good luck then in these unsecure times.

@McTroyd 4 года назад

@@luclu7_ HPQ, fortunately. Though I'd admit I was tentative in that choice at first.

@McTroyd 4 года назад

@@AndreasSpiess Thanks. Fortunately the half I'm vested in has a good balance sheet.

@steveweckel6279 4 года назад

@@McTroyd I have one of HP's first multi-meters. Still working well.

@mindyabiznarc 4 года назад

Should be very easy to make your own xt90 psu. 3d print end caps with built-in wire port's. Would it be possible to carefully clap insulated copper washers to the DC terminals of the PSU and interchange different 6awg ring adapters depending on application like EC5 XT-90S SAE etc. Those would sell like hot cakes. Lastly I wouldn't risk my life modifying a PSU when there are very safe 30-60a cc cv boost converters available on the internet. Thanks

@AndreasSpiess 4 года назад

The RC community seems to use these PSUs since a long time.

@IIoTBusinessDesigner 4 года назад

Grazie Spiess. Thank you 🇮🇹

@AndreasSpiess 4 года назад

You are welcome!

@Man_Of_Stone 4 года назад

I couldn't hear a thing you said after I saw how you let your beautiful life companion sleep in that ocean of ELF and dirty scalar waves. It may appear that she really likes that warm fuzzy feeling coming off of all that 50Hz noise. But, the effects are cutting her life tragically short. And her end stands to be painfully gruesome if you do nothing to change this. Same thing for kitties who like to be near a wifi router. It was a brain tumor for my neighbor's cat, while I was living in NZ. Not pretty. No happy ending.

@AndreasSpiess 4 года назад

She is already very old and does this nearly her whole life. So she must be strong.

@vk3fbab 4 года назад

I have an IBM blade centre PSU. Over 200A. Managed to get it to 14.2V and it can charge my dual 1000CCA starting battery AND 200AH deep cycle battery all at once. Most I have pulled is 80A. Cost 50AUD brand new. Great value.

@AndreasSpiess 4 года назад

I am not sure if my home would be able to deliver this massive power at one outlet!

@vk3fbab 4 года назад

@@AndreasSpiess even I'd need an upgrade in outlet to 15A. Not common domesticity here in Australia.

@andychow5509 4 года назад

Wow. Great info. Didn't know about pin 37, it's a great trick to use it to drive logic to control switch of pins 33 -36.

@AndreasSpiess 4 года назад

Glad you learned something new!

@cleberam 4 года назад

@Andreas. I chose to use a Dell for PowerEdge, it brings a 3.3V on Standby so I can have the ESP directly, it has ~320W, what is more than enough for most of us, but what o really like about it is that it has the ATX cable, not standard, but make life way easier overall. It requires the resistor and it did cost me $10 with shipping 😎 another great point, they have excellent ability to shut down on shortages 🤫

@AndreasSpiess 4 года назад

Thanks for sharing. I also left a link to a PCB which has the edge and ATX connectors for the HP supply

@OliverWieland 3 года назад

Hi Andreas, vielen Dank für das Video. Ich hab mir mal testweise eine PSU (HP 1200W) in der Bucht gekauft, um zu sehen, ob ich die an meinen 3D-Drucker hängen kann. Was mir zuerst aufgefallen ist: Der Lüfter dreht sich, sobald die 230V anliegen, egal, ob ich den angelöteten Schalter schließe oder nicht. Ist das normal?

@AndreasSpiess 3 года назад

Ja. Aber meiner ist kaum hörbar auf der untersten Stufe.

@johnnyboy0g460 3 года назад

Andreas. Is this usable for something like a car audio amplifier for example? If yes, how/why? I'm looking for a supply to support about 250W of power so around 60A +/-10% so that I can have a usabled subwoofer from my car setup but running in my home.

@AndreasSpiess 3 года назад

You have to try if it creates any interference. They are made for digital systems. I left a link to a (german) video on how to remove RF noise

@dave_dennis 4 года назад

I am interested in the RF scope probe. Where can I procure one of these? Or did you make this? de N5BOC

@AndreasSpiess 4 года назад

You should find a link in the description. EEVBLOG ha a Video about a DIY Probe.

@dtsdigitalden5023 4 года назад

Awesome idea. Could these be used for audio amplifier applications, such as for something like the Lepai / Lepy series of cheap 12V amps? I'm not sure how "noisy" these PSUs are.

@AndreasSpiess 4 года назад

I would try to use linear PSUs for analog stuff.

@TalpaDK 4 года назад

90% efficiency @ ~30% load is very nice, but how is the idle power consumption? For 24/7 connected usage with a low active duty cycle I find that idle consumption can quickly become a large fraction of the total power used (Also of interest are lower load efficiencies, especially if one where to say power a energy efficient home server using it, they often idle below 30-50W)

@AndreasSpiess 4 года назад

Mine idles at 12 W

@rgmtb 4 года назад

Can you do a video on how to convert this to a.bench power supply please. Thx!

@AndreasSpiess 4 года назад

I would just add a buck converter. Nothing special, I think.

@tomfahey2823 4 года назад

I have a question related to neopixels and DC power supplies... I recently tried to install a WS2811 led strip into a "smart" greenhouse, controlled by an ESP32. The WiFi network in the greenhouse is supplied by a "powerline" adapter (think something along the lines of Ethernet over AC mains power), which, unfortunately, it seems is unable to operate correctly in the presence of high frequency PWM devices, such as LED strips, due to the noise injected into the mains power when the PWM device is running. The LED strip was supplied by a rather basic 150W DC power supply, which clearly doesn't have adequate filtering on the primary side to prevent the noisy pwm signal from carrying over to the mains power. Do you think a computer PSU along the lines of this might do a better job with filtering, given that they are likely to have a more sophisticated design than a generic 12V DC supply?

@AndreasSpiess 4 года назад

Here you see some ideas (German video) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1kFAyaeHwS8.html

@tomfahey2823 4 года назад

@@AndreasSpiess Thank you so much!

@Roy_Tellason 4 года назад

I don't speak German, but I think I get the idea... :-)

@Duglum666 4 года назад

Haha yeah... i've been using server PSU's for years. Salvaged some HP DPS-800GB (12V 82A) and some HP DPS-600PB (12V 47A, but i've put two in series for 24V 47A) for free. :)

@AndreasSpiess 4 года назад

So you are a lucky guy...

@BadMax02_VR 4 года назад

You can also pretty easily isolate these supplies and put multiple of them in series. i did that for a Buck regulator put 5 of them in series to get 60v and than a buck modul which can do 50v at 20A and made my own Lab bench power supply works great.

@AndreasSpiess 4 года назад

This is a powerful Bench supply! Cool.

@BadMax02_VR 4 года назад

@@AndreasSpiess it also only was about 100€ with everything, the 5 psus and the buck modul (which was the most expensive part) it is a DPS5020 from RD Tech on Aliexpress these modules are very popular you can find a lot of videos about them i think you made a video about the cheaper version DPS5005 with only 5 amps

@gamerpaddy 4 года назад

they are cheap, powerful, usually have pfc correction, have stable voltage with relatively low ripple/noise, have protections and usually can be adjusted in its output voltage a little bit. and they are very noisy. disabling the fan or putting in a weaker one isnt ideal, they get hot without proper airflow and under too little load. i usually get mine from used server part shops (for example servershop24), they usually sell them for really cheap since they are not used in newer gear anymore and are basically waste. 400W HP powersupply for like 2€, 600W for like 5€. even for just the parts its worth it. (they also have lots of fans and heatsinks for almost no money... ) in rcgroups forum you find a thread of many server psu's with a explaination where to bridge to turn them on. many dont even need this procedure. but some are more complex than a resistor to start. www.rcgroups.com/forums/showthread.php?1292514-How-to-convert-Server-Power-Supplies for the really big boys, theres the "cisco ws-cac" powersupplies you can get for like 15...50 bucks used and they come in 1300W up to 8700W! (over 3x230V C19 plugs) at its 42V thats roughly 190A. i got the 6000W model for playing around and the 1300W for a project. havent seen the 8700W model for cheap, but the 6000W is like 25 bucks. and they are not that noisy as they look like, the small hp powersupplies are worse

@AndreasSpiess 4 года назад

Thank you for the info. I ordered a WS-CAC-1300W to play with :-)

@PIXscotland 4 года назад

A few years ago I got a Buy It Now on three Dell PowerEdge A670P-00 power supplies for £12.72 delivered! They're 12v @ 54A each. The only downside is they do not come with fans so need an external case and fan. I 3D printed a case for an 80mm fan and all is good. The one has been perfect for two years. Probably only ever loaded at 5-15A. Never did the voltage change on it. It's pretty hard to get to the components on this model.

@AndreasSpiess 4 года назад

You are right: It depends on the model. Mine was on 13.8 volts in less than 10 minutes...

@mcvertex850 4 года назад

Great Video! I immedeately ordered some of those beasts ;-) While wiring up i noticed that the bottom pin numbers shown at 6:12 in the video need to be flipped to be correct. In other words: the 'small' ground pin is the 3rd pin from the left side, that's how i noticed it...

@carlhoward5469 3 года назад

Yep, good comment. Pin 27 is adjacent to the huge ground and pin 32 is on the edge. I'm surprised he mixed that up on the drawing considering how careful he usually is.

@tinygriffy 4 года назад

looking at the fan that's build into this i imagine it will be quite loud when under load...i wouldn't want to have that sit on my bench sounding like a starting jet all day... a "normal" (my) PC supply with a 120mm fan delivers around 40 Amps at almost silent operation. (also you get 5 and 3.3 V right out of it, so no extra converters required)

@AndreasSpiess 4 года назад

It is not too loud (at least mine). And it did not run most of the time.

@tinygriffy 4 года назад

@@AndreasSpiess I see, maybe i had bad luck, the last server PSU i saw in operation was really really loud, even with no load. Maybe something to watch out for when buying ;)

@opsahle2 4 года назад

Great - a fantastic tip!

@AndreasSpiess 4 года назад

Glad you enjoyed it!

@Zellonous 4 года назад

Wtf. A good server grade psu for 20 bucks but a consumer desktop that is of similar quality is over 100. I'm so cheesed

@Un_Pour_Tous 4 года назад

I test PSUs like i test my 9 Volt batteries.

@AndreasSpiess 4 года назад

With the same gear?

@Un_Pour_Tous 4 года назад

@@AndreasSpiess lol no with my tongue. It's a joke ;)

@stavart13 3 года назад

Hello I have a resistor between pin 33 and 36. I want to put a 3 pin rocker switch(with led). Is it correct to put the resistor between the outside pins of the switch and the middle pin to a ground?

@Lion_McLionhead 4 года назад

Hacking the voltage is really hard & usually not worth the effort on new power supplies. Old ones from 20 years ago are much easier. Lions usually need 15V-18V which is right at the limit of their caps.

@AndreasSpiess 4 года назад

For the one I used it took me less than 10 minutes to get the 13.8 volts

@MiloDarkStar 4 года назад

Thanks for the great tip, I just ordered one for £10 including delivery here in the UK!

@AndreasSpiess 4 года назад

Hope you enjoy it!

@ripper121 4 года назад

I think the tow ebay Shops asking themselves why the psu is so good selling today :D. Got one for myself, life in Germany

@AndreasSpiess 4 года назад

I wrote mine a message with a link to the video...

@AtomsLab 4 года назад

Thanks for the tip! Got a 187A power supply for $30. No idea what I'll need almost 200 amps at 12V for, but damn it was cheap!

@AndreasSpiess 4 года назад

Sounds like a plan! I am sure you will find a purpose!

@riccardoz2953 4 года назад

from were?

@AtomsLab 4 года назад

@@riccardoz2953 ....From eBay.

@wearethewatt2950 4 года назад

I have had the same idea and took it one step further. If you want to turn this PSU into a proper bench power supply with adjustable voltage and current, please contact me via my website keenlab.de. I am interested in supporting you with a donation.

@AndreasSpiess 4 года назад

Done.

@shaneapowell 4 года назад

I'd suggest you take a look at ESPHome. I've switched all my smarthome esp8266 projects from Tasmota to ESPHome. You can do far more with ESPHome IMO. Provides lots of easy ways to extend functionality, and has OTA out of the box. Very much worth a look.

@AndreasSpiess 4 года назад

Thank you for the tip!

@HamRadio200 4 года назад

Eh, don't believe everything you see or read. I've built this exact same power supply. While it does provide some relatively clean DC power, the RFI it generates is un acceptable for most modern HF transceivers. Too much hash. Radio operators should know what I am referring to. While you might be able to use it on a vhf/uhf station without too much issue, on HF, you're better off with one built for radios.

@AndreasSpiess 4 года назад

I think I left a link to a video to get this problem solved.

@sortofsmarter 4 года назад

WOW...this was great...I just found 2 of them with dead fans only at my local second hand computer junk store. HP 750W, So I put a Noctua 40mm server fan in it. now its powerful and quiet and was only $4.00 plus the fan

@AndreasSpiess 4 года назад

This is called a bargain!

@benbaselet2026 4 года назад

20 bucks? I just pull loads of them for free from old servers... Kind of crazy how much useful stuff we throw out constantly.

@Ferraday 4 года назад

Where tf do you find servers

@benbaselet2026 4 года назад

@@Ferraday Companies throw them out constantly. Basically just ask from someone who works with that stuff if you don't happen to work in a place where they are used.

@AndreasSpiess 4 года назад

This is one reason fortgoss video, to reuse useful stuff. Good if you have a direct access.

@certified-forklifter 4 года назад

Thanks for your video. would be a nice solution for my hypercube 3d printer. but i wonder about the safety. What happens when it breaks? does it catch fire, or simply shuts off? Because after all, it is still a device which was in use for many (thousands?!) of hours. Can anybody talk about that? :)

@AndreasSpiess 4 года назад

I assume they will not catch fire. Think what would happen in a multi-million DP center if one catches fire...

@certified-forklifter 4 года назад

@@AndreasSpiess Thanks.

@MrZetor 4 года назад

id - These industrial PSUs always have over-temperature, over-current, and short circuit protection, i.e., the device just shuts down, and depending on the model, lights an error LED and/or reports failure to the computer, either via a serial bus or separate dedicated signals. They usually also monitor that the input AC voltage and all the output DC voltages are in range. Obviously, anything _can_ catch fire, but the build quality of server PSUs is about 100x better than regular PC ATX power supplies. I would argue that the expected life-span of a used server PSU (with typical 5-7years of 24/7 use) is still more than 10 years longer than a brand new PC PSU.

@SianaGearz 4 года назад

Please consider a whole-system failure mode: the PSU is fine, it's operating within parameters, but you have a fault path in your printer, while PSU is happily supplying power that sets it ablaze. It's millions of times more likely.

@Ruudrad 4 года назад

Nice solution! If I need 24V, is it (relatively) safe to put two in series?

@AndreasSpiess 4 года назад

You have to remove the cases or isolate them. You find info with google

@Iceteavanill 4 года назад

In that case I recommend you to buy a used industrial psu for example from Siemens. They are also very high reliable but mostly have less current capability

@Hessijames79 4 года назад

Great idea!

@Rob2 4 года назад

It can be risky when you overload it. As long as everything is within limits, no problem. But when you short it or even worse when you go to the max output current, one gets powered in reverse by the other one, and BOOM. And you need to study the design. Sometimes the - is floating or easy to disconnect from the frame, sometimes not.

@Rustbox306 4 года назад

Have you thought about buying a cheap chinese IGBT welder for a super strong DC power supply? Those can be found for less than 100$ on chinese websites.

@AndreasSpiess 4 года назад

We need a regulated voltage and I assume this is not needed for a welder.

@altus2 4 года назад

Watched the video, bought the same PSU on Amazon Marketplace 5 minutes later for £15 :D Thanks, this is genius!

@AndreasSpiess 4 года назад

Glad it helped!

@blindekuh8891 8 месяцев назад

Hi Andreas - as always with your videos, I liked that one very much. Although it's 3 years old now. Some people recommend theses as power supply for programming car ECUs, where we need lots of Amps, but also a very stable Voltage / quick reaction to changing current (how is this measured?) and low ripple and noise (

@AndreasSpiess 8 месяцев назад

No, I never did anything like that :-(

@oakinger 4 года назад

after going through the past few UK election campaigns, your "strong and stable" statement made me weep...

@AndreasSpiess 4 года назад

That is what everybody wants. Obviously ;-)

@bassmanwell1255 3 года назад

Hey...i have this exact psu but i blew it because i found it with a damp rear end....how do i fix it

@ogprettyDEMOATNA 2 года назад

Bro. U r awesome. Didnt even need to watch the video, just the tiny germ of an idea (actually, the true definition of "meme") and I dgaf about modifying xbix 360 PSUs or even reading the labels on (potentially broken) PSUs in trash piles. Srsly, ur great! Absolutely subscribing, abd going to browse your back catalogue - as a (bottom) 1%'r, subsisting on 328$ and sone food stamps PER MONTH, all of my tech hijinx require crafty reuse, and theres never tol many ideas!

@AndreasSpiess 2 года назад

Glad you liked the video! It is a truly cheap power supply...

@ninline2000 4 года назад

The link led me to a 2 pack for 28 dollars. They're on order now. Thanks!

@AndreasSpiess 4 года назад

I hope you will enjoy them!

@VincentFischer 4 года назад

Another quite cheap and very efficient way of getting power for your projects are ebike/scooter chargers. Most of the times they can easily be modified to put out the voltage you need, just be aware of the max voltage of the output caps

@AndreasSpiess 4 года назад

I never thought about that. Thank you!

@AB-pb8oo 4 года назад

@@AndreasSpiess be aware that the caps in this HP are only 16V. Check out this review (in Russian, but the browser's built-in translation should do) - mysku.ru/blog/china-stores/75308.html Also check out the charts - it is quite noisy (500mV ripple), which is a no-no for some applications.

@KiR_3d 4 года назад

Any used PSU is a roulette in my opinion. I've didn't thought that 62A is an actual power for Neopixels! My thoughts were "hmmm... 8-10A max." My main aim is bipolar PSUs. For DIY analog synthesizers. Some MeanWell PSUs are ideal for it. But gives not too much power (1-2A). The cost is about the same :) I must say that 10-20 bucks for a bipolar MW PSU seems too much IMO. Maybe you know something to solve this? Also MW PSUs has a pretty noticeable volt. noise (can be filtered of course).

@AndreasSpiess 4 года назад

1. These PSUs are successfully used for years by the RC community. The quality of the parts seems to be much better than most other power supplies we can buy. 2. For analog stuff, I never suggest using switching PS. Better no noise than filtered noise ;-)

@garychap8384 3 года назад

Do we know what functions are available over the PMBus I2C? Whenever I see an I2C on a product I get all excited ; ) At home I run Dell M1000E bladeservers and each of the 6x 2280W PSUs in a chassis is monitored for all kinds of metrics from power, stability, heat and fan speed. You can also limit their power. Also, the fans seem to be capable of being run up to 100% and then backed off again - which is a great way to make sure they're unobstructed and working fine - long before you actually need them : ) Interestingly, the Dell PSUs also measure voltage and current at the input and output! So, you know when they (or your mains supply) is in poor condition. So, I wonder if there are any documents out there that describe the management features that exist on the HP PSU's PMBus and how to access them? Or, maybe I could acquire an older HP server (only about £75 here, complete with 2x PSUs) and debug the I2C for clues. The I2C might be the very simplest way to put a nice digital front-end UI on the PSU - with various graphs, measurements and health status. Perhaps set various limits and even a manual or power-on fan-test. It may be quite rewarding to poke a little deeper into these units. Thanks for sharing !

@garychap8384 3 года назад

The older specs for PMBus are here : pmbus.org/Specifications/OlderSpecifications Lots of documentation here : www.pmbus.org/Specifications/CurrentSpecifications I think there's enough information out there to really start getting the most out of these PSUs - and to build our own pretty management Interfaces and some graphical monitoring/instrumentation for them. There may even be some open source PMBus code out there for common microcontrollers that we could embed : ) The following is from Wikipedia entry on: _"Power Management Bus"_ *implementations* _As of summer 2007, PMBus is relatively new so not many products yet advertise support for it. Given the richness of the specification, firmware based implementations running in microcontrollers are probably easiest to provide, although several of the current products do not involve microcontrollers. One firmware-based example is the Texas Instruments UCD9112. Another uses about 2Kbytes of code on an Atmel AVR 8-bit microcontroller on the NGW100 board controller_ _In fall 2009 more products are available. The NXP PIP8000 and Maxim MAX16064 are two recently announced chips, which have vendor-supplied graphical user interfaces_ _As PMBus systems are deployed, tools to manage those systems should become significant. Some of them may just be used during manufacturing, to set up system-specific parameters used with reconfigurable power subsystems. Others will be useful for runtime optimization, for example with server farms._ I think we could do more with these : )

@darylmorse 3 месяца назад

I wish you would discuss the mod for increasing the voltage on this PSU. I think you could correct the misinformation that's circulating on various RU-vid channels.

@AndreasSpiess 3 месяца назад

You should find it. Important is that you search for exactly the right model.

@Rob2 4 года назад

The efficiency is quite good indeed. Some time ago I bought such a supply which was a bit older, I think it originally came from a SUN server. The efficiency at full load was OK (not as good as this one), but: it had quite a large power consumption at "idle" (no output current). As I wanted to use it as my station power supply, in the junkbox it went. Did you measure the power consumption at idle? (switched on, but little or no load, like with the TCVR on receive only)

@AndreasSpiess 4 года назад

Mine consumes 12 watts idle with nothing attached. Just switched on

@Rob2 4 года назад

@@AndreasSpiess Thanks! That is very acceptable...

@TeoNN 4 года назад

@@AndreasSpiess And how much does it consums with main 12V 62A turned off (just the 12V 2.5A line active)?

@AndreasSpiess 4 года назад

@TEONN: The same if you do not draw current

@anatolsam6715 Год назад

Hi, Andreas. Thank you for detailed description. Is it possible to use this power supply as adjustable laboratory power supply? I mean to modify it to the regulated one from min to 12-14v? I tried to increase output voltage up to 13.8. For that purpose I shorted SMD resistor, but PSU lost their output voltage at all. I think that overvoltage protection save some data to the controller. Maybe you know how to reset it?

@AndreasSpiess Год назад

I Do not think it has a memory (other than if you killed something). 13.8 V works for me for more than a year. Maybe your change produces more than 14 V and the overvoltage protection kicks in all the time

@Lisas4us 8 месяцев назад

I have 5 emerson 3.75 kw server power supplies in use. each runs on 53.5 V. These Powersupplies have an RS485 interface to adjust voltage and current. But I never got around to tnker with it. I was wondering if this is up your sleeve.

@AndreasSpiess 8 месяцев назад

53 volts is above my range. I usually stop at 24V ;-) They could be used for huge RF power amplifiers.