Build a Simple Power Supply
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- เผยแพร่เมื่อ 29 พ.ค. 2024
- Today I’ll show you how to convert an old notebook computer power adapter into a useful variable power supply for your workbench. This is a great project for beginners and experts alike!
Article with parts and wiring details: dronebotworkshop.com/simple-s...
More articles & Tutorials: dronebotworkshop.com
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Today we will build a useful bench power supply that has both a fixed (5-volt) output and a variable 0 -17-volt output. It's a useful addition to any workbench, and it’s safe and easy to build.
We’ll repurpose a common netbook power adapter, there are thousands of these lying around from computers that have seen better days. They commonly have a 19-volt output, with decent current capabilities.
The design is further simplified by using some buck converter modules, one for a fixed output and one with a variable output and a digital display. The convertor I used even has a memory feature, allowing you to store and recall multiple output voltages. It was easily available on Amazon.
This is really easy to build, so even if you are just getting started it's a great project. And as all the nasty high-voltages are safely tucked away in the power brick you don’t need to worry about shocking yourself.
Here is what we will be covering today:
00:00 - Introduction
05:56 - Power Supply Design & Components
06:42 - Wiring Diagram
07:54 - Getting all the parts together
11:44 - Testing the Modules
16:15 - Building the Power Supply
21:16 - Testing the Power Supply
I didn’t have time to paint or label the case but even so, this build looks pretty good, thanks to the “DROK 180081 Numerical Control Step Down Voltage Regulator” that forms the heart of the design. I picked mine up on Amazon, along with the “LM2596 DC to DC Buck Converter” modules used for the fixed output.
You don’t have to build the exact power supply I did, you can use this technique for repurposing old power adapters to create all sorts of custom power supplies. Just make sure to observe the current rating and the polarity of the supply output.
You’ll find an article accompanying this video on the DroneBot Workshop website. Between it and the video, you should have no trouble safely assembling this useful addition to your workbench.
Hope you enjoy the video, please subscribe to the channel for more. - แนวปฏิบัติและการใช้ชีวิต
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Are you a teacher or a professor? I don't know but your way of teaching is very clearly and because of that, it make things understandable in every tutorial. You must have some kind of teaching degree.
Seriously this is one of the best ever presentations available anywhere on the web
I love your graphics. It shows point to point. No confusion. You are so good. Thank You.
This is my first electronics project. I re-purposed my Dell XPS charger (who had a silly-mounting DC jack socket, and making a mounting bracket so I could mount it on the case took more time than the actual soldering/putting together the parts.....), learned a bunch about drilling into plastic, mounting stuff onto the box, testing it with my multimeter etc! thanks very much for the idea and the tutorial, can't wait to use it now!
The variable supply has a current limit feature as well. Very useful. Excellent, as usual
That P.S. is really "clean." I prefer things like this to store bought any day. Nice Job. I will enjoy making one just as much as you did.
I am all about re-purposing / reusing any thing I can in my projects. Thank you for sharing your knowledge. Ubuntu my friend
Fantastic little project to make use of one of the old lap tops chargers I have hanging around that I refuse to chuck away. Thanks for the content. Brilliant as ever.
FANTASTIC VIDEO! HIT THE NAIL ON THE HEAD! YOU'RE THE MAN! KEEP IT UP!
Great idea. I've even got an old laptop power adapter on hand. Thanks.
Never "button" it up, until you thoroughly test it. That looks awesome!
Put the playback speed x 1.75 ... thank me later.
Thanks for all your videos, a gold mine of knowledge..
This is such an elegant solution! I have like 3 of these laptop power supplies in my e-waste bin! And I still don't have a lab bench powe supply for some reason so this is great!
Oh and I can 3D print a case for it too so... This is going to make a great project.
As the use of extra buck converters for more fixed voltages affects the current draw on the laptop power brick, it is recommended in the video to use them sparingly. It occurs to me that one way to add as many fixed voltages as needed would be to have each of them on a separate switch, so that you can put them in-circuit as required without necessarily overtaxing the overall draw on your power source with modules that are not being used. ...don't mind me, just thinking out loud. ;-]
Nice video, thank you. Handy little variable power supply.
I could watch these all day, absolutely brilliant.
This man lays it right down on the mat.
I AM watching these all day ;)
th-cam.com/video/kQ2GMITYfCA/w-d-xo.html heres the one you want
As usual , excellents ideas and explanations to carry out a project to the end. Thanks a lot .
Hi my friend, I am from Austria and have followed a lot of videos from you. The way how you explain and show the things are perfect. Also it is very easy to follow your speech for an foreigner. Good work. br henry
Your videos are detailed and to the point. Hats off!
Subscribed!
Thanks for the video. I would appreciate your thoughts on using two of these DPS units on the same power supply. AFAIK they monitor current using a shunt in the 0V rail. This means if two DPS units are used and connected to the same load (say 5V and 30V to an amplifier circuit) then the 0V low-resistance shunts will be in parallel so the current readings will not be correct. Also, in your box, if you used both outputs to power the same load circuit and connect both 0V to the load circuit, there would be 0A current reading on the DPS meter. If you do not connect the 0V from the small 5V buck board, then the DPS Ammeter will show the combined current used by the load circuit.
Thanks for another great video. If you use water based acrylic spray paint (from a car parts place or a hobby model shop) it drys quickly . It might need a couple of coats. Then give it a coat of spray varnish.
Ótimo tutorial, parabéns!
I love this guy. I keep saying it but he's just the greatest!
You're the teacher we needed at school.
thank you for one more fantastic video tutorial!
I will make one , thanks for the tutorial.
Very well explained , thank you for your tutorial.
I swear I looked to see if you had any link to a component list. NOW I see it. Geesh. The golden years I guess.
I LOVE this idea, now to make my own with three outputs ;)
Fantastic collection of Tutorials. Thank you. I request you to cover topics associated with the Teensy 4.1 controller along with possible applications using it.
Very nice project! I think I'm gonna build one my self. Thanks.
As many tech videos that I watch and I just now found this channel? DroneBot Workshop is AWESOME! Great project! But I'd love to have one more output for 12v automotive power also. ?? Like enough amps to run a CB or car stereo.
Very conservation minded and functional.
The workshlop is awesome. I'm sorting out my workbenshlch
Love your videos. clear and concise. 👍
Dear sir.thankyou so so much indeed.for sharing your knowledge with us.
This is an absolutely superb design.
Its exactly what i needed.
Easy to build.not having to design boards.
Its all done for you.
I will most definetly be building this set up.
And thankyou most kindly
For your most exellent
Indtructions.
Clear concise.and above all easy to understand.
Keep up the exellent work sir.well done.im a new subee.
Thankyou most kindly sir.steve from the united kingdom.
I found some nice project boxes online yesterday that have a flip down leg in the front so you can stand them up at an angle, just like any other device you'd have sitting on the work bench. This project would be perfect for one of those.
With your permission I would like to link the enclosures I've found in case anybody considering this build wants to see them.
Very good and very helpful project 👍
I built the old atx power supply with you.. But I seem to be running out of space so I am going to move the old power supply to my other bench and build this little one for my main project bench.. Thanks Bill. you don't realize how much you have helped this old man learn new tricks.. Carry on, take care of yourself and enjoy the heck outta life!
tinkmarshino / I’m also short on bench space so I’m taking out a parts tray that’s about the right size and installing it there. Not a perfect spot but it will work until I upgrade my shop.
@@NewAgeDIY Dale, my problem is that at 67 I am just starting and didn't know what I would need and what I would not.. It turns out What I do need is more area so I built a bench area for experimenting on and then needed one for building on.. ( I am lucky and was able to build a room onto my house for my computer and electronics stuff..)I am getting my room done slow and sure.. Good luck on your shop upgrade Dale.. That is always a fun project..
tinkmarshino / thanks for the positive feedback. I have worked with computer and electronices for years. Spent some of my time working as a Apple certified bench tech and picked up some Microsoft wallpaper along the way. Retired a few years ago at 60, now pushing 71 this year. DIY / Making community has helped me out in keeping up with the latest technology.
Only lately ( about 2 years) TH-cam channels have helped me out in understanding the newest low cost maker technology like SBC. They have provided hours of enjoyment building new systems or Maker projects.
I'm glad your getting into it now, I'm sure you won't be disappointed.
@@NewAgeDIY heck Dale.. I just bought a power supply off of amazon.. It was only 50 bucks on sale and it would have cost me around that to build the other one.. yeah I know.. "buyer beware!" and homemade is better..
tinkmarshino / yes, it can be frustrating sometimes building something only to find something better for less. Normally I try to modify the build by add more features. I sometimes end up overdoing it and spending more money on the whole project trying to make it better. It’s challenging but rewarding at the same time.
You might want to add a note to warn people there are a large number of very similar variable power supply modules from China that look exactly the same but use either AC or DC as input. Your solution assumes the module uses DC input. Great video ! Keep them coming.
Another great project in the Workshop! Can I ask where you purchase your cases/chassis from like you used in this project? Even more specifically what terms should I be searching for on Google/Amazon. THANKS and keep up the great work with your channel. I've learned so much from you :)
really nice build and just what the doctor ordered - thanks. Will use similar for electrolysis work. Hmm, thinking the ATX power supply conversion coupled with the variable output from a 19v lap-top charging brick all in the one enclosure would be hyper cool. So thats what I'm workin' on - probably take me months - double hmm, maybe the Gelman Sciences Inc. Deluxe Regulated Power Supply will save me the trouble.
I built something like this in the past. I used a beefer Buck Converter that can handle five Amps and added a USB-A socket for my Regulated 5+ Rail. I replaced the Multi Turn Pot to control the Current so the Current can be limited. I also have a Fuse inline with it and a Output Switch to control the ON/OFF state of the Output. The Variable Module doesn't have a Fuse since it has built in protection. I'm currently building a new Power Supply that will be a Linear Supply and will have six Variable Outputs from 0V - 24V. I won't use the Buck Converter Modules but some cheap Power Supply boards I found on Amazon and after buying one and tested the heck out of it I will probably use those. Still debating on the Meter, dunno if I should go the Arduino route or have six Panel Meters.
Great tut! Thanks 😃.
thanks, you mr for the knowledge and clean excellent videos as I am an electronics technician especially home appliances but still I watched and your workshop
Thank you for sharing this project along with details. As a begginer this is what I have been searching for. Simply superb and very well explained. I tried to look for some sites for cases but would u suggest how I can get the cases with different sizes. I have this buck converter but it produces lot heat does it require heat sink and how do I add heat sink. Thanks
Liked every small detail 😊
An ON/OFF switch is always nice to have
First time seeing a Mastercraft multi-meter similar to mine in a YT video... warms my Canadian heart! ;-]
Just for you......enjoy! here: th-cam.com/video/dsRTZc_4sXE/w-d-xo.html
@@englishrupe01 Haha! Thanks!
nice & clear , well done
I guess that 5.0 V and 3.3 V would be the two fixed voltages one might want to get from this power supply. One maybe also want to have a small fan to vent the case.
But as usually, a great video.
Very informative video. Well done, and I look forward to viewing others.
One question -- can you provide some detail on where you purchased your enclosure? A link would be great if you have one.
Great video as always!
I have just been looking at these variable power supplies on e-bay. I am not sure yours is of the same type but it states on the instructions not to use it to charge batteries or power capacitive loads. This would lead to the battery or capacitor feeding current back into the unit and probably causing damage to it. They advise using a diode so that no reverse current can flow.
Reminds me of when I built several fixed 5V power supplies, with most parts coming from Radio Shack (R.I.P.). There we no off-the-shelf modules at that time, and we built everything from the mains on: transformer, bride rectifier, 7805, etc. And I've always used stranded hookup wire for electronics, never solid.
I miss Radio Shack! I built a lot of linear supplies in the 70s and 80s with big bridge rectifiers and 3-pin voltage regulators.
Wow! So cleanly done! Just one suggestion, heat sink required over the 5 v variable supply, the IC heats up..regards
Thanks a good idea. I didn't really observe any heating, but again I didn't run it for a really long time.
@@Dronebotworkshop Buck converters are quite efficient, very little energy wasted as heat (energy).
@@abhijitborah right, buck converters are efficient, but the one on regulated supply with 5 v type gets heated , it can deliver 5 A max, so application wherever below 3 A is fine above it gets hot, in amazon india it comes with a heatsink supply..
Thank you. No fan? how much max current before one needs a fan in this case?
Another great project! 👍
Nice one.....even I could build this
Until u shock u self XD
Excellent job
Thanks for the video! I built one just like this about 6 months ago. I used an old 32V printer supply. It works very well and was very cheap. The hardest thing was cutting neat rectangles in the plastic project box. Drills and files are good, but a sharp chisel works well on ABS too. The only other thing I'd recommend is placing your terminals 19mm apart. That way twin banana plug adapters fit. Cheers...
@Rob Mods..... What is the output current capacity of the old 32Volt printer supply...?
@@NavinBetamax It's from a old (15+ years) HP printer I threw out a while back. 1Amp, if memory serves...
@@RobMods I guess the current rating won't be enough. Use a Laptop power supply or Mod a hacked UPS transformer. If it is from a lazer jet printer, the current rating would be high....but most lazer jet printers have inbuilt power supply which also powers the heater . i suggest you use a laptop power supply !
Really like your work
Excellent, thanks.
Dear Mr Incredible Dronebot, I had to write to you to personally thank you, but to also congratulate you for the great channel that you have created. You are like a guru for us more humble mortals ! :-)
One week ago I didn't know what the hell an Aruino Uno was, it sounds like an Italian car..!!
Anyway, I have ran my own business for around 30 years and have entered this incredible digital world. and thanks to you, and your patient and professional style of tutorial, (and hours and hours of trials & errors!) I have managed emulate some highly successful projects with stepper motor control. The more successful my projects go, the more confident and hungry for the next project I become.
What you do is more than helpful, its a blessing.
Is it possible to get assistance from you with any of my serious professional projects re connecting up and sketch etc?
With my thanks & regards,
Harry, from London UK
Isn't he so good? We should call him "Professor DroneBot".
Great project !!!
Excellent... I am excited
Thank you.
I really thank you very much for this project! Everything is explained in detail and very easy to understand. Where did you geht this wonderful looking plastic case? I hope you go on... Boris🇨🇭
S
I think it's called the project box and can be purchased in most electronic parts supply store
Sweet. I was wanting to make something like this as a frontend to an ATX power supply for supplying quite a bit of power. I didn't know that variable converters with displays existed. I will have to check those out. Hopefully some are available that could do current output in addition to the voltage output.
The current is just what gets drawn, not something you would set. You do need to be aware of the max it can draw though.
Benjamin Ramsey
I am talking about a current source, like to easily drive LEDs. It would change the voltage so that the specified amount of current is provided. It would be like using current limiting resistors, but it would be dynamic. And, current limiting would be an amazing feature on the voltage source.
Okay, yeah that would be a good application, makes sense.
Question: What keeps you from using too much volts, like say turning the varible to 19v and using the fixed at the same time bringing it up to 24v. I under stand the varible buck converter has an over charge circuit but does the fixed. It looks like the fixed is wired directly from the power pack. Also would adding an inline fush help protect the buck converters?
Love the idea, I have sever of those power packs collecting dust right now.
Great Job
thank you very much
Great vídeo, I´m from Brazil.
Well Done
Thx for the great video. It would be really cool if you'd make a video using that atx power supply
I did make a video for the ATX supply -th-cam.com/video/n_A-jkpjpcM/w-d-xo.html
Two questions... 1) if you only want the variable, do you need the buck module at all, or can that be removed from the diagram?, and 2) using your previously built cpu power supply, could you use one +12v and one -12v line combined to feed the var in on the regulator?
I don’t know why every time staring and checking your stuff if something going to change 🤔😁
Very good!
Thanks! How many ohm load do you use?
Thanks for your videos! Do you have some tests of the USB-C PD power outlets? Thinking of using a big USB-C power bank to drive my High-End DAC. But what is the quality of the USB-C outputs of a power bank?
You have a great channel and you're are a good teacher, but please, could you leave some links where you buy your stuff.
Thank you ' nice video
Transparency for lettering.
I've printed on a transparency for labels in the past. Mirror print so that the labels are under the transparency. Cut to the same size as the front panel with holes for the components.
excellent video - the ATX power supply needs a bit more features like a combing the variable part with the ATX power supply? thanks your videos are very professional.
Nice idea! I think there was space for the laptop power supply.
Great project! How hard would it be to add a current limiting circuit for the buck converter? That thing would most likely get fried if the output was inadvertently shorted.
I am making a slightly modified version of this power supply in that it will have three fixed voltages, each with a separate buck converters, plus the variable converter as you have in your video. I want to make sure it stays cool so I am thinking of adding a small 40mm fan which works off 5v at 0.18A. Would you suggest this should have it's own buck converter supplying it, or could it run off the 5v converter I am installing to supply 5v output? I don't want to mess up the output from the fixed 5v supply. Many thanks, Peter on the Scotland/England border.
Thanks for the great video, I'm looking forward to your arduino vids.
Hi, amazing video and explained it properly, thanx for making it and spreading the knowledge. I would like to see if you can also make a project that you can make you own CNC machine as I see that in you previous videos that you have made you are making things with Arduino boards. I would appreciate it if you can make one, thank you :-)
Can i use this beauty in a portable led light panel ? For photography and video light purpose ? If i can hook up a few li-on batteries to this power supply it will be amazing for portability, also screen looks cool ! Great job.
Could u drill a hole over the 5 v variable adjustment screw and if needed just adjust it for 3.3 v and so on ?.
could you design a variable/pedal operated power supply for a sewing machine? I think it varies the voltage very precisely so that motor speeds are controlled accurately?
Can have multiple applications like power tools etc. or operating other motors?
What was the size of the resistor you were using during load testing?
If I set a fix voltage on an adjustable buck adapter, I like to drop a bit of hot glue on the trimmer to indicate that it's set to a specific output and prevent "accidents".
It's within a case, how will an accident occur?
One screwdriver on the wall is slightly sideways!
More than one, damn that's unsettling.
I saw that too!! Totally messed me up! What did he build again?
Love the project. I'm sourcing out the parts tonight. Thank you.
@DroneBot Workshop: Thank you very much! A lot of electronics require negative voltage...like I require + and - 5V for my audio preamp circuit (for testing). How can we get +5v, -5V, and neutral?
The ATX (PC) supply has these voltages
Would it be worth it to add a red light to the PSU front panel to remind you that the computer power brick is plugged in? This is an interesting project.
Are the adjustable buck converters found in any house hold items
Sir, can we make this using the transformer-based linear variable dc power supply?
I don't think something like this would work for audio projects. It will work for a great many projects, but audio ones suffer from switch-mode power supplies and the circuitry in buck/boost converters that create line noise. Many amplifier projects require voltages like +/- 24V as well. I'm currently looking for a 48V+ centertapped transformer so I can build a linear regulated supply just for my audio projects.