#342
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3 роки томуWe 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
I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, EEVblog, and others
Links:
My HP HSTNS-PL18 750W PSU: ebay.to/2VklriY or ebay.to/2Bp5dhs or amzn.to/3ibw69j
Connector for these PSUs: s.click.aliexpress.com/e/_dXy3yeu or ebay.to/3i999DA or ebay.to/2BIdJYS
ESP-01 with relay: s.click.aliexpress.com/e/_dYbF4K4
Tasmotize the ES=-01 relay: www.loxwiki.eu/display/LOX/ES...
Near Field Probes: s.click.aliexpress.com/e/_dZi4CTm
Good information about pins: colintd.blogspot.com/
German video about PSU electrical noise and its removal: • Video
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@d3vastat0r89 3 роки тому
Lol this dude is a savage. "Film your endeavor"
@AndreasSpiess 3 роки тому
It was just a tip ;-)
@k1zmt 3 роки тому
He just has a good sense of humor.
@kalifack 3 роки тому
Yeah laughed so hard. I love electroboom :D. I think he explodes more Capacitors than anyone in youtube :D.
@PeterMilanovski 3 роки тому
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 3 роки тому
@@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 😉
@zapador 3 роки тому
Great tip! Just grabbed 4 of them on eBay shipped from the UK, total 48£ shipping included.
@getyerspn 3 роки тому
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 3 роки тому
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. 3 роки тому
Where in UK you get these for free?
@getyerspn 3 роки тому
@@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 3 роки тому
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. 3 роки тому
@@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.
@PHamster 3 роки тому
**Waits for ElectroBoom** **EEVBlog walks in first**
@zvpunry1971 3 роки тому
And after Dave explodes a capacitor, Mehdi comes to tell you about the giant TV he found in his dumpster room.
@mullervolker9814 3 роки тому
EEVBlog has Nighttime now.
@raguaviva 3 роки тому
@@mullervolker9814 EEBLog is a nightmare, too much talking for me.
@rhiantaylor3446 3 роки тому
Server PS will also have excellent power factor.
@AndreasSpiess 3 роки тому
Thank you for the addition. I did not look at it.
@seanflanagan5674 3 роки тому
@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 3 роки тому
@@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 3 роки тому
@@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 3 роки тому
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.
@christopherj3367 3 роки тому
great sense of humor, and the cats a bonus.
@ahothabeth 3 роки тому
I do wonder about electro-static discharges with cats.
@kitecattestecke2303 3 роки тому
@@ahothabeth if you run hard on their fur you can use them as a high voltage powersource
@Vitaliuz 3 роки тому
Indeed!
@ei23de 3 роки тому
Thank you for sharing! You are a good man, Andreas!
@AndreasSpiess 3 роки тому
You are welcome!
@AjinkyaMahajan 3 роки тому
Dishika is on power-saving mode 😁 and reboot can consume a lot of power.
@AndreasSpiess 3 роки тому
:-)) She is quite easy to reboot if she is hungry ;-)
@tbbw 3 роки тому
The RC scene has been using these server psu's for years to power lipo chargers for their cars and such :)
@AndreasSpiess 3 роки тому
True. As well as the bitcoin community. But I did not know it :-(
@NiHaoMike64 3 роки тому
Also popular for use on the CR-10 3D printers.
@Sliceoflie 3 роки тому
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 3 роки тому
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
@tonysshadow 3 роки тому
Thank you!. A very good start for identifying pinout on all HP power supplies. I suspected the pins had to have similar functions to a normal ATX power supply....and they do.
@AndreasSpiess 3 роки тому
True!
@MiloDarkStar 3 роки тому
Thanks for the great tip, I just ordered one for £10 including delivery here in the UK!
@AndreasSpiess 3 роки тому
Hope you enjoy it!
@sincerelyyours7538 3 роки тому
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 3 роки тому
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 3 роки тому
Upcycling! Really good use of the hardware, I approve.
@AndreasSpiess 3 роки тому
Hey, thanks!
@circuitdesolator 3 роки тому
It is my first time to know the technique on PCB traces to delay signal lines. So nice. Thanks for sharing ;)
@AndreasSpiess 3 роки тому
Glad it was helpful!
@crckdns 3 роки тому
Was also about to say that my lipo charger for my drones is running from the server PSU for years :) also few other projects run from a second PSU ^^ Good video! I'm glad that you've found this solution!
@AndreasSpiess 3 роки тому
Cool. It was new to me and it seems, it is new to many viewers. We learn every day...
@mannhansen9337 3 роки тому
I can still remember the power supplies used in DEC VAX computers, they were 5V @200 A. This was around 1990.
@firstmkb 3 роки тому
Damn, I could use one of those for an electrolysis project!
@AndreasSpiess 3 роки тому
I never investigated it when I sold them as a DEC Account Manager;-)
@luigimantuano9383 3 роки тому
@@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
@thebeststooge 3 роки тому
You had me in stitches with this one. Well done.
@AndreasSpiess 3 роки тому
Glad you enjoyed it
@CanadairCL44 3 роки тому
Another great project. I especially like your digital pointer!
@AndreasSpiess 3 роки тому
Thank you very much!
@andychow5509 3 роки тому
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 3 роки тому
Glad you learned something new!
@NautilusCL 3 роки тому
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 3 роки тому
Just ordered one for my HF rig, once converted to 13.8V.
@AndreasSpiess 3 роки тому
Here is the video to make them quiet (in German)
@willannison1300 3 роки тому
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 3 роки тому
is this possible without danger @Andreas Spiess
@Ferraday 3 роки тому
Frank Müller besides ground connection issues, they are totally fine
@kitecattestecke2303 3 роки тому
@@grindel80 no you have do disconnect the shell from the ground output because if the case touch each other they go bang..
@cheetahkid 3 роки тому
@@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 3 роки тому
@@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.
@villageidiot8718 3 роки тому
Thanks for the heads-up. I have a couple HP DPS-600PB supplies I've been using for several years. Don't currently have need of this one but grabbed one off eBay for $17 anyway.
@AndreasSpiess 3 роки тому
They are really cheap!
@jameswyatt1304 3 роки тому
Been using them for high-current 12V sources for a while and glad to see such solid technology avoid the ecycle path for a while. You can drive an ESP or RP0W off the standby voltage, providing WiFi network or BT. Then a GPIO pin can bring the high-power portion to life only when needed. Funny thing: the standby fan runs louder than the running fan for most of my uses... Thank you for your video!
@AndreasSpiess 3 роки тому
Fortunately I had not a big issue with the fan. It did not run during my tests. But I only went to 50% for a relative short time.
@shenqiangshou 3 роки тому
love the shout out to electroboom! haha!
@AndreasSpiess 3 роки тому
:-=)
@RomanoPRODUCTION 3 роки тому
Thanks, now I can make a 12V oven for my 3D printer 😂
@AndreasSpiess 3 роки тому
Have fun!
@nutsnproud6932 3 роки тому
Thanks for the video Andreas. I learned something new today.
@AndreasSpiess 3 роки тому
Glad it was helpful!
@dennyfox3139 3 роки тому
Wow, what a great tip!
@ShaunakDe 3 роки тому
I need a "in HP we trust" tattoo.
@AndreasSpiess 3 роки тому
:-))
@Ferraday 3 роки тому
Damn it, every time someone spreads the word, I lose more and more $5 800W psu offers
@excitedbox5705 3 роки тому
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 3 роки тому
@Philosophical Thoughts: I hope you have already bought a few of them ;-)
@icghost2 3 роки тому
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 UKposts. 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 3 роки тому
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 3 роки тому
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
@ON5XX 3 роки тому
Tnx Andreas. Nice video. I recently removed a couple of those power supplies from old servers. They are on my shelf waiting to be modified. I will keep it a bit simpeler ;-)
@AndreasSpiess 3 роки тому
That is ok for me. I just wanted to spark the imagination...
@emrfixit 3 роки тому
Love your pointer!
@AndreasSpiess 3 роки тому
Thanks!
@ahaveland 3 роки тому
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 3 роки тому
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 3 роки тому
@Andy: I posted a link to a connector board.
@ahaveland 3 роки тому
@@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 3 роки тому
I ordered those: www.aliexpress.com/item/33029711948.html But I do not know if they will work.
@ahaveland 3 роки тому
@@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!
@flos251 3 роки тому
Nice video. I have a question about the psu: what is the standby power consumption with no load?
@paulham 3 роки тому
Interested in this too
@Ferraday 3 роки тому
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 3 роки тому
Philosophical Thoughts wow Your house must be very warm even in the coldest winter
@AndreasSpiess 3 роки тому
Mine uses 12 Watts
@Rob2 3 роки тому
@@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 :-)
@dazryan3463 3 роки тому
Exactly the right topic at the right time for me. Just starting to use arduinos, esp32s and Raspberry PIs for a few project around the garden so having a quality PSU plugged in my shed is a problem solved. Thank you Andreas
@AndreasSpiess 3 роки тому
You are welcome!
@ravelkoff3549 3 роки тому
Hi Andreas, I followed your description now - I bought one of these (they are cheaper than 20€ incl. delivery at the moment), I soldered a switch and the 12V connectors to it - and it's working perfectly! The special feature of the temperature sensor, which is making the fan turning in a proper speed is absolutely fantastic. It is quiet and strong. I love it :) Thank you so much for this video :)
@AndreasSpiess 3 роки тому
Thanks for sharing your experience. Glad you like your purchase!
@ravelkoff3549 3 роки тому
@@AndreasSpiess Yes, of course. I am a victim of the woodgas bug and need more experiences with electronics and sensors. So I found your channel so helpful and your style so excellent that I will follow you a long time in future. ;) Perhaps you can help me with a hint? I am looking for a sensor working with Arduino, which is able to detect a level in a 10cm circle from a distance of 50cm? Ultrasonic sensors don't fit the 10cm circle when measuring from 50cm distance and lasers are measuring only a point not 10cm. You have an idea?
@AndreasSpiess 3 роки тому
I only know these two methods :-(
@ravelkoff3549 3 роки тому
@@AndreasSpiess Thank you for your quick response - that's sad. I hoped you know some more possibilities which I am not aware about. But thank you anyway. :)
@McTroyd 3 роки тому
"In HP We Trust." As an HP shareholder, I approve of this message. 😁
@luclu7_ 3 роки тому
HP or HPE? :P
@AndreasSpiess 3 роки тому
Good luck then in these unsecure times.
@McTroyd 3 роки тому
@@luclu7_ HPQ, fortunately. Though I'd admit I was tentative in that choice at first.
@McTroyd 3 роки тому
@@AndreasSpiess Thanks. Fortunately the half I'm vested in has a good balance sheet.
@steveweckel6279 3 роки тому
@@McTroyd I have one of HP's first multi-meters. Still working well.
@ganon4 3 роки тому
Make a video "How to power up your Raspberry pi 4 cluster with cheap DC power" => Conquer UKposts. Thanks for the video :D
@AndreasSpiess 3 роки тому
I am not too much interested in Pi clusters for the moment :-( My Pi4 is strong enough.
@rfbase 3 роки тому
Tell Dishka I said hello. Looks happy to be with you in the lab. Greta video. Thanks! I've also used ATX power supply for PCs. They include 12, 5, and 3.3 Volt. and usually around 500W. I also switch mine on and off with ESP8266 and 5 V relay. Switch on/off with html page hosted by the ESP.
@AndreasSpiess 3 роки тому
True. If you need lots of 5V and 3.3v it is probably the better choice.
@prtcgv5105 3 роки тому
Thank you so much Andreas!!! I just got mine... this thing is a beast! I will try to adjust mine to put out 13.8 volts ;)
@AndreasSpiess 3 роки тому
Should be possible if you go the right one...
@zen11930B 3 роки тому
I have a Dell L1100A 12V 90A power supply that has remote volt sense terminals. It doesn't appear to have any internal volt sense. By connecting a 1k pot in series with 6k8 across the output and connecting the wiper to the remote volt sense input I get an adjustment range of 12V to 13.6V. By changing the 6k8 the output range can be altered, but protection circuits switch off the power supply as the output approaches 14V. This approach may work for other power suppliers.
@rudyvk 3 роки тому
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 3 роки тому
A German HAM did the investigation and remedy of the RF noise. I put the Link in other comments.
@koma-k 3 роки тому
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 3 роки тому
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 3 роки тому
@ 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 ;-)
@ninline2000 3 роки тому
The link led me to a 2 pack for 28 dollars. They're on order now. Thanks!
@AndreasSpiess 3 роки тому
I hope you will enjoy them!
@synco1985 3 роки тому
really nice, I've done this for a 3d printer with the exact power supply that you have, but it was way to noisy. Great work by the way, I really like what you do and like your channel. Have a nice day!
@AndreasSpiess 3 роки тому
Did the fan always run?
@synco1985 3 роки тому
@@AndreasSpiess yes, I still have it but I don't use it for that anymore.
@stevetobias4890 3 роки тому
@@synco1985 why not put a new quiet brushless fan on it to reduce the noise
@download333 3 роки тому
This seems like it would be ideal as a 3D printer power supply
@shadow7037932 3 роки тому
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 3 роки тому
Isogen just connect two of them in series then. You’ll need to insulate 3 screw+stand-offs inside the psu
@milesmccoo 3 роки тому
@@AugustoZanellato does that work with all switchers?
@mich29sm 3 роки тому
@@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 3 роки тому
@@mich29sm I just decided to use dc to dc converters and a modest secondary battery bank rather than do a float.
@typxxilps 3 роки тому
SOLD OUT ... looks like you had sold his 340 units today I guess.
@AndreasSpiess 3 роки тому
I do not know how many you ordered. But it seems there is ample supply.
@typxxilps 3 роки тому
@@AndreasSpiess none, that's why I replied cause I'd been too late
@jort93z 3 роки тому
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.
@avejst 3 роки тому
Great update video 👍 Thanks for sharing 👍😀
@AndreasSpiess 3 роки тому
Thanks for watching
@mcvertex850 3 роки тому
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 роки тому
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.
@nayefhaidir 3 роки тому
*1 Week Later* Price Increased :D
@AndreasSpiess 3 роки тому
Maybe already today. That is why it is good to be subscribed;-)
@ScottRipley 3 роки тому
@@AndreasSpiess Been buying the platinum version for about 8mo for $12.50 shipped, and already $28 when I looked today.
@dolandump 3 роки тому
He wanted to be like ElectroBoom xD
@AndreasSpiess 3 роки тому
:-)
@DaveHuntMaker 3 роки тому
Nice one, Andreas. I'm currently building more parts for next Christmas' display, and I've been using PC power Supplies, 650-1000W. I just picked up 2 additional 1000W server PSUs on Ebay for under €50, including shipping to Ireland.
@AndreasSpiess 3 роки тому
Sounds you have a lot of light during Christmas time ;-)
@xrpirate536 3 роки тому
Education and Entertainment! I love it! Your videos are awesome!
@AndreasSpiess 3 роки тому
Thank you so much!
@Aemilindore 3 роки тому
Thubs up this comment to demand an electronics video with Andreas's wife. Bring her in!! Bring her in!
@oniruddhoalam2039 3 роки тому
Andreas probably got divorced from her.
@AndreasSpiess 3 роки тому
I am happily married. Bu she does her thing and let me do mine ;-)
@Aemilindore 3 роки тому
@@AndreasSpiess haha no problem. Some other day then..
@craiglarson2346 3 роки тому
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 3 роки тому
That switching on/off should be done with a transistor, not a relay, as the PSUs expect that.
@icefire5555 3 роки тому
I never really thought about this. but the idea is genius!
@AndreasSpiess 3 роки тому
True. That is what I thought too when I saw it.
@t1mmy13 3 роки тому
Finally got around to ordering some of these. 12 volt with current to spare to do fun stuff like neopixel as you used as an example, great to have laying around in general and at 20 euro including shipping a piece there is nothing that beats them. Plus it's recycling! I've wanted to order some DIY PCB from china for a long time too this is a perfect simple project for that, I can 3d print a cover for it and it will be a proper safe to use DIY power supply. Thank you!
@AndreasSpiess 3 роки тому
Sounds like a good project!
@hacKnosis 3 роки тому
Instant suscribed! Great content man.
@AndreasSpiess 3 роки тому
Thank you!
@M0UAW_IO83 3 роки тому
Nice video, the edge connector is a 'standard' too so the tips should work for a lot of server PSUs, there is a way to increase the voltage without diving into the innards as well, look up DPS800
@AndreasSpiess 3 роки тому
I just googled and saw You can change voltage from the outside with the DPS800. Less dangerous. Thanks!
@IIoTBusinessDesigner 3 роки тому
Grazie Spiess. Thank you 🇮🇹
@AndreasSpiess 3 роки тому
You are welcome!
@MartinPDanz 3 роки тому
Cool Idea and good sense of humor 😊
@AndreasSpiess 3 роки тому
Thanks. Glad you think so!
@tarikrachiahi3415 3 роки тому
Thank you for this very useful video
@AndreasSpiess 3 роки тому
You are welcome
@qwaqwa1960 3 роки тому
Thanks for this. I got me a 1200 W version! :-) Can't believe the small size!
@AndreasSpiess 3 роки тому
Enjoy!
@visitslovenija 2 роки тому
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 2 роки тому
You are right. They have an overvoltage protection. In your case it was very low. Usually they kick-in at 14 volts.
@TheEmbeddedHobbyist 3 роки тому
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 3 роки тому
I had less than 10 minutes for the 13.8 volts conversion. Pay attention. It can hurt ;-)
@TheEmbeddedHobbyist 3 роки тому
@@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 3 роки тому
One hand in the pocket is very good advice!
@ErikBrocko 3 роки тому
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.
@muxallopeniot9194 3 роки тому
I also thought it was cool, I like your sense of humor and the summarized at the end. Great video!
@AndreasSpiess 3 роки тому
Glad you enjoyed it!
@AtomsLab 3 роки тому
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 3 роки тому
Sounds like a plan! I am sure you will find a purpose!
@riccardoz2953 3 роки тому
from were?
@AtomsLab 3 роки тому
@@riccardoz2953 ....From eBay.
@aldergas01 3 роки тому
I use server psu since always, very good stuff.
@AndreasSpiess 3 роки тому
Thanks for sharing your experience!
@5Komma5 2 роки тому
Always a good idea to have a System Administrator as a buddy. We have these types of power supplies by the truck load. The real high power supplies are in spinning drive storage arrays 😁😁😁
@AndreasSpiess 2 роки тому
True! But also without buddy, the prices are ok.
@f_2476 3 роки тому
Thanks for the video it was useful 👍👍
@AndreasSpiess 3 роки тому
Glad you liked it
@katelights 3 роки тому
you can also get premade breakout boards for these supplies, they handle the switch on and give you some nice screw terminals to hook up your loads.
@AndreasSpiess 3 роки тому
You are right. Another viewer told it to me and I added a link in the description.
@cleberam 3 роки тому
@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 3 роки тому
Thanks for sharing. I also left a link to a PCB which has the edge and ATX connectors for the HP supply
@opsahle2 3 роки тому
Great - a fantastic tip!
@AndreasSpiess 3 роки тому
Glad you enjoyed it!
@laurieinjapan Рік тому
Wow, fantastic idea. I just checked on some local sites and there are hundreds of these!
@AndreasSpiess Рік тому
Yes they are!
@cbrightly 3 роки тому
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 3 роки тому
Well possible. But thousands are used right now. This is not a new idea.
@stewartrv 3 роки тому
I purchased a couple a while back one had no fan but was very clean and the 2nd was really dirty which was very surprising for the reasons you mentioned in your video. I had no luck finding any info for my specific models allowing me to increase the voltage but I have already purchased a 300w step up switch mode supply from China so that I can run my radio on 13.8 even from a deeply discharged battery (say 10v) so now I simply use the same step up for the radio if I need more than 12v from these supplies. This way has the advantage that I can create much higher voltages if I need (up to 50-60v). It costs about double this way, is a little less efficient but is more flexible too. Next time I'm going to pay attention to the specific model more closely to ensure I get one which I know is easy to mod...
@AndreasSpiess 3 роки тому
True. It pays off to do the research upfront. Mine was easy to modify.
@michaelkeller5008 3 роки тому
cool idea! working on a LED-project that's currently on hold due to the lack of normalpriced but suitable PSU... Think it's on again :-) Dankää!!
@AndreasSpiess 3 роки тому
It seems to be a very good fit!
@michaelkeller5008 3 роки тому
@@AndreasSpiess most defenetly!
@peerappel2012 3 роки тому
NO WAYY!!! I have the exact one you have laying around still LOL. I already ordered card edge connectors to someday make an adapter board to make interfacing/getting power from the psu easy
@AndreasSpiess 3 роки тому
In the meantime I found ready-made connector boards. I posted a link in the description.
@peerappel2012 3 роки тому
@@AndreasSpiess Wow, thanks! Thats what I wanted as I was planning on using it as a power supply for a pc in which a normal ATX power supply does not fit
@SwitchingPower 3 роки тому
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 3 роки тому
That is what I thought. But I did not find a readymade Arduino project.
@BadMax02_VR 3 роки тому
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 3 роки тому
This is a powerful Bench supply! Cool.
@BadMax02_VR 3 роки тому
@@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
@sortofsmarter 3 роки тому
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 3 роки тому
This is called a bargain!
@excitedbox5705 3 роки тому
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 3 роки тому
Cool. I have to watch out for that.
@NiHaoMike64 3 роки тому
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.
@VincentFischer 3 роки тому
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 3 роки тому
I never thought about that. Thank you!
@AB-pb8oo 3 роки тому
@@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.
@bishalnaik2011 3 роки тому
Thank you ,i was looking for a power supply for 150 dotstar projects
@AndreasSpiess 3 роки тому
should be sufficient...
@PhG1961 3 роки тому
Really nice ! Especially since I have several of those PS's available... never thought of this solution.
@AndreasSpiess 3 роки тому
So you have a project for the next week ;-)
@PhG1961 3 роки тому
Andreas Spiess first finish the existing project.... I try to have some discipline and not to give in to start many things more or less at the same time and never finish anything.... Those days are (almost) over....
@fritanke2318 3 роки тому
Nice.👍 Unfortunayely shipping cost to me is more than the cost of each item. Well, maybe I can find some used in my scrap box. Thanks for the detailed explanations.
@AndreasSpiess 3 роки тому
Shipping is always something we have to consider. Same here :-(
@altus2 3 роки тому
Watched the video, bought the same PSU on Amazon Marketplace 5 minutes later for £15 :D Thanks, this is genius!
@AndreasSpiess 3 роки тому
Glad it helped!
@GrandpasPlace 3 роки тому
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 3 роки тому
Good project!
@AdamosDad 3 роки тому
I bought one some time back the HP 441830-001 100 amp at 240v model and haven't got around to experimenting with it yet, the reason I wanted it was for an amplifier supply. But the Ameritron ALS 500m came with one so I didn't need to do the 13.8v hack. It was cheap enough that I'm not worried about it, I will simply find another use.
@AndreasSpiess 3 роки тому
During my research I found a lot of HAMs using these PSUs un 13.8 volts. Hope you will find a use for it.
@AdamosDad 3 роки тому
@@AndreasSpiess Thank you, Andreas, I will, I never want to waist good electronics gear.
@apollorobb 3 роки тому
We have been doing this in the US for Years. We use them to run RC car chargers
@AndreasSpiess 3 роки тому
That is what I learned now, too. And there are many mod instructions on those paltforms...
@gaby1491 3 роки тому
you are awesome, thank you
@AndreasSpiess 3 роки тому
You are welcome!
@gaby1491 3 роки тому
@@AndreasSpiess I have been using HP power supplies for a while and they are extremely reliable and quiet until pushed at over 600W load for the 1200w models
@vk3fbab 3 роки тому
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 3 роки тому
I am not sure if my home would be able to deliver this massive power at one outlet!
@vk3fbab 3 роки тому
@@AndreasSpiess even I'd need an upgrade in outlet to 15A. Not common domesticity here in Australia.
@Jimmyzb36 3 роки тому
I just subscribed because of the pointer!
@AndreasSpiess 3 роки тому
Welcome to the channel!
@efimovv 3 роки тому
Brilliant!
@AndreasSpiess 3 роки тому
Thank you!
@samuelschwager 3 роки тому
Great tip! Bought 8 of them ;)
@AndreasSpiess 3 роки тому
Enjoy!
@beauregardslim1914 3 роки тому
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 3 роки тому
I do not know if it is cross-vendor. At least it seems to be a HP standard.
@nicoful86 3 роки тому
Thanks a lot for this video, I picked up one similar model as yours for ~€25 incl shipping. I just have one comment regarding changing output voltage on a live PSU: You say that it's too dangerous and I agree! But you could do a video where you modify the resistor values by injecting voltage to the DC-side safely using a 13.8V rated PSU/bench PSU. That would be a highly appreciated video!
@AndreasSpiess 3 роки тому
There are many different types around and all have to be modded differently. If somebody is capable to do the hack, he is also capable to find it, I think ;-)
@nicoful86 3 роки тому
@@AndreasSpiess I agree. Thought particular model of PSU could've been the subject for modding 👍
@dave_dennis 3 роки тому
I am interested in the RF scope probe. Where can I procure one of these? Or did you make this? de N5BOC
@AndreasSpiess 3 роки тому
You should find a link in the description. EEVBLOG ha a Video about a DIY Probe.
@dtsdigitalden5023 3 роки тому
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 3 роки тому
I would try to use linear PSUs for analog stuff.
@cdc1138 2 роки тому
@Andreas Spiess, although I'm thinkering with mining rigs right now, this is a great video, many thanks. I know this video is getting 'old' but it's hard to find any tips on how to make those PSU's a bit quieter using the pots. Any tips??
@AndreasSpiess 2 роки тому
They are loud by construction if used at very high currents. And some supplies are even loud at low power. So you maybe can cover them in a case.
@birnodin 3 роки тому
I worked in a data center some years ago. These power supplies were installed in server racks with constant strong airflow of about 15-20 C. I am not sure they can withstand an environment of 30-35C in summer without any additional airflow. Be carefull and disconnect the power fast when your house is burning. Or find another maker (not your neighbour, fire can spread out!) to test it for you! ;-)
@benbaselet2026 3 роки тому
The ones I've checked will accept inlet temps up to 40-45 degrees C even. My newest dell has options for targeting max output temps and the selection goes up to 70-80 degrees C! Obviously the expected life time and long term reliability will be reduced.
@AndreasSpiess 3 роки тому
From what I see, thousands are already used. This is not a "secret" anymore. Most of the people probably do not use them to the max.
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