DIY Mini Lab Bench Power Supply (With Switchable DC and AC Input)
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- Опубліковано 27 вер 2024
- This video will show you how to make a small yet functional lab bench power supply, with the added feature of being able to power it from any DC power source anywhere between 3 and 50V.
Warning: Working with 110V or 220V is extremely dangerous without proper knowledge. Please consult a professional if unsure. I am not responsible for injuries or damages caused by this power supply during build or use.
Documentation and script: drive.google.c...
3D print, laser-cut, and engineering drawings: www.thingivers...
If thingiverse isn't working, use this link: grabcad.com/kr...
Part links:
(Amazon Links are affiliate, they support the channel with NO EXTRA cost at your end)
AC-DC 36V 5A 180W Switching Power Supply:
Amazon: amzn.to/2Zhea7i
eBay:www.ebay.com/i...
UC Tronics 50V 5A step down converter:
Amazon: amzn.to/323GRBI
eBay:www.ebay.com/i...
Banana Plug female:
Amazon: amzn.to/2ZqJQCn
eBay:www.ebay.com/i...
3 Pin On off On switch:
Amazon: amzn.to/324MQWR
eBaywww.ebay.com/i...
5.5mm female DC jack:
Amazon: amzn.to/2ZvNWcs
eBay:www.ebay.com/i...
80x10mm 12v Fan:
Amazon: amzn.to/2ZqKAYb
eBay:www.ebay.com/i...
Other parts are salvaged from old electronics.
Music used:
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Dude - parts list, 3D print, laser cut, and blueprints - that is the way EVERYONE should be doing their tutorials - really good job!!
Sure, as if anyone has a 3d printer at home.
@@ciprianpopa1503 3D printers are really affordable these days... I got one for £180 and it is great
@@ciprianpopa1503there are also some companies that can print whatever file you send to them. Usually that's at an affordable price
Literally has a blueprint to hand cut it...
At the current moment this project is 100% not worth making - because you can buy 60v 5A power supply at a cost 2-3 times less than this DIY device.
I'm 62 years old, retired, and been working with electronics since tubes were in fashion. I really enjoyed this video. While I can afford a ready-made power supply, you've inspired me to make my own variable voltage supply. Thanks!
Could you guide me in doing my project?
Future youtubers take note - this is how a tutorial is done. My compliments. Awesome video.
Omg, I'm literally just printing your 18650 powerbank the whole day! Specially bought an ender 3 to make this project. I'm really excited to make this one too in the future. Love the way you explain everything and make it available for everyone to make. Thanks and keep up the good work!
@@Solipsfilm de ender 3 is een geweldige 3D printer. kijk online voor mods om het nog beter te maken!
For some reason I cant download the file on thingiverse?
YES!! Now the development of the monster battery pack kit will speed up by 1000x!!!!
man the old one is just too tight to do solders and shit honestly he should kickstart the case and the circuit boards so if people source cheap 18650s itll be a cheap powerbank lmao
Your projects are cool as hell....but your soldering technique is genuinely terrifying.
I was also worried about it.
His soldering technique is worst commercial product level.
I see this so much of the time anymore, don't they teach soldering in electronics programs anymore?
@@ReneStover I have no idea. I mean, i only did electronics in high school, so i can only speak for that.. almost 20 years ago... they taught me to solder correctly. I've only gotten better at it since then. I don't know if they cover soldering in high school anymore, or college, or vocational school....maybe they do, maybe this guy was taught how to do it right, but doesn't care, or sucks at it..
Or maybe he's self taught, and learned how to solder from watching some tit on youtube do it wrong. I honestly have no idea. What i do know for sure is that his soldering technique is genuinely terrifying.
Soldering don't come much worse than that. ;)
The solder job at 8:49 was horrendous, although some of the other joints were not QUITE so bad. Some of the soldering footage was at 2x speed though, so it looks like he withdraws the iron too early but may not be quite as bad as it seems. (Still, I agree, the results are not fabulous by any means. This is a problem when working with mains, earthing, etc...)
Your channel is awesome. Step by step instructions, parts list, script, models, and documentation? You've created the perfect place online to learn and follow along.
This is the best DIY Power Supply video I've seen on UA-cam. You can tell you put a lot of time and work into it thank you.
How to solder a 20amp Diode : HOLD THE GOT DAMN IRON ON IT UNTIL IT GETS HOT ENOUGH AND SOLDER *FLOWS* onto the leads (2-4 seconds)
that being said i was VERY impressed by how you desoldered that SMD LED , i couldnt do that if i tried :D
Forthereg M if you have a chisel tip that is big enough and don’t need the SMD LED, just slap the iron on both pads
Doesn't take much - big blob of solder on the iron tip, touch the LED, pull it off. Most of them time they're even salvageable, but not necessary for this.
Good job, I think you will find holding the soldering iron still will give better results and better heat transfer.
Nice build, may I suggest using a thermal speed controller for the fan instead of a switch or just auto full on. This way you prolong the life of the fan and also have the appropriate speed to match the temperature needed to be cooled.
Edit**
I am looking to do something similar with a toroidal transformer that has 2 suitable secondary windings that will give me a 5v Fast Charge USB and 2x 12v outputs as well as two additional windings (with on/off switches of course) to use as a dual variable supplies
The fan idea sounds smart. How would you do it if you made this modification?
This is an awesome build. I think a flip down handle underneath so you could flip it down angling the box/screen upward for easier viewing. Just a thought.
You should at least learn how to solder before designing a mains powered device, learn about reliable connections and how to connect the mains earth without being a safety hazard. Then think about the mechanical stability of your casing before you switch on your EMI/Ripple generator.
At all it visually looks nice and many considerations went into this project. So thank you for showing this off.
Agree. It is scary at times. It seems more like 'tacking' than soldering. And, like you said, no mechanical bond. and like you alluded to the connection seems ill-suited for mains or high current..
Dude, I really liked this video. You took great pains to explain every step which I really appreciate. Meticulously executed - well done!
Nice project! Warning though - your XT60 connector is the wrong one for the output DC - you could short that connection with a screwdriver or small piece of wire, LED leg, resistor wire etc that may fly in there. Safer to have DC out of a MALE XT60 as you can't easily bridge it. 👌🏻
Overall the kid did a fair job with the video. What amazes me are the self absorbed guru's out there trying to nit-pick what ever they can to make themselves feel good for not being able to accomplish anything equal to or better.
8:15 - Man that really grinds my gears when people twist wires the wrong direction.
maybe you should find an outlet , like post some videos of your skills then, everyone a critic.lets see what you make.
hightechhippie It’s not that serious, bud. 👍
@@williams6550 Whats right and wrong in jointing wires? Its just a joint.
Great work! Also use a mosfet for reverse polarity protection from the DC input as that is much better than having a blown diode or damaged battery 😅.
i watched all ua videos.. u r really an amazing guy...simply genious..
Because he can solder together fine made done modules ? :"D
Pls... check GreatScott and think about it again...
I mean... this is not bad, but nothing special, except the 3D printed housing, everything else is known stuff long time ago... i had a buck boost converter almost the same, but better version (because it is not just Buck Converter) and had a better Displayed controll board...
All was 10-15 USD from Aliexpress.
It is a good solution... until u bought a PSU...
Had many bullshit in this video, but fair enough, interesting !
If I might offer a suggestion, spacing the banana jacks by .75" will enable the use of industry-standard two-conductor leads. It looks like they may be a tad farther apart.
This just exemplifies how the world has changed. Technology is affordable and within the reach of just about anyone. Now, it's only a question of what new innovations will come out of this environment. And I would venture to say the greatest innovations will come out of the emerging and third-world countries where innovations and "make do" adaptations are a necessity.
And not a single fuse was given that day.
Apart from buying better quality components, how can you make this PSU more safe?
Resistance is futile.
@@theUsesOFnot To make it safer? Well, for starters, I wouldn't be using a 3D printed enclosure! Its a nice design, but if it wasn't full of holes already, it would be soon enough... How was it made? With Heat. What generates a shitload of heat even when it operates normally? A Power Supply! Seems counter-intuitive to use homespun plastic to enclose high voltage/high heat projects, doesn't it? How reliable are those plastic screw posts that hold down that heavy power transformer when he drops the unit and doesn't check it because he sees no external damage? Remember, this plastic is not the same plastic they use to make your practically indestructible power tools!
In his place, I'd use a metal case, ground it properly, and learn how to use a damn soldering iron to avoid dangerously resistive cold-solder joints! ;-)
To the question of fuses, no additional protection is required here. There is already a fuse on the PSU board right behind the green AC input terminals that he removed. And the front unit that controls everything already has all the necessary safeguards one would expect it to have. I suppose that If the PSU fuse blows too often, you could always choose to mount it externally, but I don't believe it would be necessary.
Sorry, for the long reply, and for assuming it was a general question to anyone. ;-)
they run out the stock ahahahah
@@robertcartier5088 LOL. k tho. I feel like if a power supply is heating the case to be the ~200degrees that 3d printers heat the filament to when printing, you have another issue. xD thanks tho
Looks nicer then most of the small power supplies on the market. .
Nice build!
A comment from this guy tells a lot 🔥
The man himself
I finished building this PSU today and I have to say that it is really awesome but I installed an BeQuiet Silent Wings 3 12v Fan to cool the entire thing more efficient.
If you want to get a 3D printer that is cheap and easy to repair, then I recommend the Creality Ender 3 pro. I bought this printer for 120$ from ebay and it just worked fine, after I printed 3D upgrade parts to improve the 3D printing capabilities with this printer.
Can I say that in the UK we did use red live, Black neutral, Green earth, but we converted to European colours years ago? Brown live, blue neutral, green earth in our plugs, & all mains operated items, have to come from the manufacturer with plug wired, I believe. Good video, I like it.
The power supply that you made is awesome and actually the biggest advantage is the dc input . Thanks for the project.
I think that I have to make a new power supply .
👍👍👍👍
This is a fantastic video! Really nicely done. Although, I highly doubt you saved any money by doing it yourself, the fun was probably worth it.
This channel deserves SO MUCH MORE attention! Great projects, well explained, so much effort! Just thank you m8!
cannot afford lab power supply because expensive - makes DIY project and prints case with FRIGGIN' 3D PRINTER !! haha
A good project that is ruined by soldering that is not just ugly to look at but more importantly highly dangerous if this unit is actually intended for real world use over time.
I like how you manage to get so much stuff into a small space in a nice enclosure. Well done!
However, you should really look into how to make better, more reliable connections, especially for the mains wiring. You should always use proper crimp connectors for that. Frankly, the way you did it, I wouldn´t trust that thing in the slightest. On top of that, those chinese mains power supplies of that type are very unsafe as is. I´ve had an almost identical supply short the AC mains to the output WITHOUT tripping any protection. I was lucky I didn´t touch it with my fingers.
@@jamiehardt3061 or perhaps at least shoot a glue gun around parts of it.. IMO .. but i'm far from an expert !!! But overall I think it's an excellent video and i'm going to built it and order parts tomorrow morning.!!!
Ordered the parts and they are on the way ..Note: I ended up buying and finding all the parts for a lot less on EBAY than from Amazon.
i never understood why you people in the us always use crimps. never seen a single person outside of the us be so paranoid about soldering mains wires to a psu. I still wouldn't completely trust that thing because of how cold the solder joints were, but if it were properly soldered I wouldn't mind it at all.
@@somedude2492 It is because a crimped connection provides better mechanical stability than a soldered connection can. When you solder a wire, solder wicks up into the strands and creates a very brittle zone. This area can be easily snapped off with even heavier wires. Second, a crimped connection does not create tin whiskers and short out components, like happened in the Apollo mission that killed it's crew. Further, crimped connections are more resistant to chemical attack and corrosion than solder, because solder forms a galvanic cell with the wire. I think you should try it out, and actually compare well made crimps to well made solder joints. They both have advantages, and understanding them will help you understand where they are used most.
You're finally back! Hello and welcome!🙂
Good video, you teach me lots of things. If you just buy, you don't learn much, and are not sure if all the safety features are in place.
It is necessary to use rosin resin for soldering!
Good idea to assembly circuits out of the shell in a box that fit your needs. a couple of hints: add a fusebox to cover the hivoltage cord AND in another place the outputs in case of a short of the load, in an accesssible side to blast em in case of failure; add a layer of insulation using a shrink tube on 220 terminal.
use color coded wire inside to know what wire is carring what.
Due it's a tool to be moved , fix condensers and other big elements with hot glue (couse on transportation\ accidentally falls those boards arent assembled and builded for a mobile use).
on terminals connection glue is not a solution : prepare a pcb board, and use it (with addictional screws) to add mechanical resistance otherwise in frequent use those terminal will unglue form the chassis. best regards!
If you have a single roll of filament to print the plates with: try painting the whole plate and sanding the surface over a flat sheet of abrasive.
this will leave the inwards embossed text painted.
Great video, and thank you for the case design! Everything looks great.
Nice! Very nice compact unit. Thanks for sharing!
The only thing I don't like about your design is that the AC power cable is fixed. Would be much better with a removable cable.
just what i was thinking, am currently looking at IEC sockets, and adding a fuse on the mains side as that's also missing from this project
Yes! Another Video from Kralyn. I love all of your projects so please keep it up! Especially your powerbank was really cool.
This Guy Is A God/Genius..!!
im addicted to this video...
Oh Boy, I am glad to see this video, i was just the other day debating to build me a CC / CV bench power supply.. but i was going to build it with 2N3055 Transistors. but now that i see this one, it will be much easier and efficient.
Please come out with more videos.. I love your type of work, Thank you!
9:33 Very well designed xD
The case is pulled in like paper.
If by "pulled in like paper" you mean that the plastic bends easily, yes, I saw that too.
But looking at the print quality, it's clear that in 2019, when he did this project, his printer was not printing very well at all.
There's a lot of layer separation and I suspect that he may have printed at a bit too low temperature.
When I had problems with my printer, I also got that separated layers thing and very poor bonding of the layers because I COULDN'T print hot. The best the printer would do was about 190C. Anything hotter and the filament would pull out of the extruder.
This was caused by a really poorly designed heat break and cooling of the heat break.
I redesigned that portion, added that blue tubing inside the direct drive extruder and a duct system with a much better, variable speed fan.
Now with the heat break being cooled properly, I can print PLA at 235C, which is very hot, but really works well for me. I now get the most solid prints without layer separations anymore.
I also had to do some other tweaking and frame alignment to get it working perfectly.
This guy may need to do some of those things, unless he's now got a better printer.
Everyone is complaining about the soldering technique, I fully agree and was apprehensive to say anything. I was appalled at the soldering technique, soldering is the most important part of electronics assembly.
oh man-so cool.will save for future project this fall or winter
Wow you actually come up with this idea years ago (I have reinvented one of those recently)
I used a different step up/down convertor since that is cheaper. and I opted for USB-C rather than AC input since AC to DC power supply is not that elegant and I already have a handful of usbc charger around.
But I guess now you can just make the power supply as a module of your power bank? That would be really nice to have.
This guy has a 3D printer and Solidworks license and he doesn't have a bench power supply lolzzz
Joking, very good project.
You beat me to it. I was thinking the same thing except the lol..
@@smgvbest 😉
good work, in my opinion the best case by connectivity in UA-cam
I REALLY want to build this! I'm learning on a arduino board and I build drones and rc stuff also working on automotive wiring and I'm excited to expand my knowledge and abilities!
Though you take time, your projects are perfect...
Oh man i hope you read all comments and you're improved your soldering technique.
A very inspiring project. My needs are a little different but this project gave me lots of ideas.
Great Project, very well explained walkthrough! Keep up the good work
I love your channel...
Covers always looks clean
And diagram was awesome..
Nicely done job! But let's admit: the price per unit is much higher than you were referring to in the video: just the parts cost about $80, add filament, labor and other little things and it's price jumps over several hundreds (mostly because of labor :)
When it's a hobby labour is free. But point in fact, when it's a hobby labour has a negative value. That is, it's a form of entertainment that you are paying for.
I feel your pain on the power supply, I've always used computer power supplies
Awesome project idea and video! But it kind of looks a bit janky and some proper techniques could probably fix most of that
Interesting..now i can use my knowledge on electronics.too bad i dont have experience on 3d printer.
He includes the 3D print files in the description. The hard part (designing in CAD) has already been done.
Just buy cheap project box on ebay or ali
WoW... Nice project! Hugs from Brazil. 🇧🇷
you always make qualityful DIY video.
If somebody need it, in Czech republic is a change, L3 is Grey not black
Great work sir , but I prefer laser cut metal case because I want to release the heat and applied the case as a ground to protect some noise emission :)
Your engineering skills and creativity are inspiring to watch. I definitely enjoy the videos where you explain better than the ones with words on the screen and music. Well done!
You are the MAN! wish i had this vid last year, i couldve made a much better bench psu for myself. Def on my list to do soon
You don't instill confidence when at 1:22 the 5 watt resistor starts to turn red and you let the smoke out.
you did a very fine job on this sir good job!
very very good job
I really like the way you make great videos
Most 12V fans will work in the range from 5-13V, there are many that will work from 3-14V
I just found this video today and liked and subscribed.
I really like what you do. Worthy to follow
I have one of those modules and it's the most annoying piece of equipment I own. Just starting it takes more steps than it should, then to change setting takes a few more, including using presets. The current/wattage is off a little so be careful powering delicate stuff. Other than that it's cool little device
I am learning electronic basic
After doing breadboard project I know dc power supply is really needed but I can't afford or build one like your .
One you made is really cool from your diy tutorial I atleast understand basic requirement but still I have to rely on my lead acid battery
Excellent work Bro I was try to make this
Thanku
very cool but cold solder joints can become a fire hazard so uh, yeah...
Outstanding, looks great thanks for all of your hard work!!!
very good its really understand easily
mewah bener bos power supplynya. jadi pengen punya juga 👍
This was amazing, thanks!
For 12 volt stuff I use 12 volt car lightbulbs to limit current. Great when you have no money. 21 watt is great. Just under 2 amps.
It would be great if someone could post the most economical commercially available option, that will do the same as this unit. I am sure there is something cheap from alibaba or dhgate lol.
MFJ-4230MVP is a power supply small enough to be shipped and its a 30amp with voltage adjustment knob.
Put a high value cap across the output of that DC step down converter, and then it's great. I had issues with ripple until I did that.
Wow this is amazing! I'm envious of that power supply but I can't really justify the cost as I already have two simpler ones (cc&cv, no power setting etc)
Very nice and compact design.
i like all your stuff .... pretty cool
Very good! thumbs up THANKS
Please show a clear diagram. How to connect the elements step by step?
What a cool project! Thanks for sharing!!!! :) I need equipment too, and even used equipment is too expensive. All sorts of ideas come to mind, a frequency generator, oscilloscope, electronic microscope for small component soldering...
Thank you so much for this video. You wouldn't happen to have a DIY oscilloscope video would you? Lol. This is really going to help my workbench set up. Thank you again. Oh, and don't mind the trolls. Your soldering technique is fine. Best regards.
This is a fire starting kit, especially in a wood case.
What do you mean? I'm considering building one but if its wrong or isnt a correct design then im not going to take the chance
Since you play with high voltage you really must learn how to solder properly YESTERDAY. Soldering is not hot glue. You have to heat the piece you are soldering and aply the solder on the heated part or else you get a cold solder.
Excelente proyecto, tendre muy en cuenta tus recomendaciones, tus ideas son un verdadero agassajo en mi mente
There is a HUGE difference between a switched mode power supply & a good linear power supply. The biggest difference is noise & it is especially important with analog electronics & instrumentation.
You're a rockstar Kralyn! Thanks
Great job.
I am from Pakistan.