Lab Power Supply from Broken Audio Amp + Buck and Boost Converters
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- čas přidán 26. 07. 2024
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The second part to this video is now online:
czcams.com/video/_CFIovMkRyg/video.html
Did you hear of a channel called "GreatScott!"? He is German too and has a lot of creative electronic projects just like you do.
GreatScott is not on this level.
PLEASE FINISH YOUR SWITCH MODE POWER SUPPLIES TUTORIALS!!! THANK YOU FROM EVERYONE WHO HAS BEEN WAITING FOREVER !!! IT IS THE BEST CONTENT I HAVE EVER SEEN , IN COMPARISON TO THE UNIVERSITY LECTURE NOTES I HAVE READ !!
Ihr Englisch ist erstaunlich fließend!
you sound like Arnold schwarzenegger
I don't know where to start. This is such fantastic work and so inspiring. I love that you repurpose materials and I love the aesthetic of your builds. I have so much to learn. Thank you for another inspiring video.
Nice project. As you say, the most expensive parts of most power supplies are the transformers, heat sinks, and chassis. This is a great way to reuse something that would otherwise go into a landfill!
This is back to your best like the old days, superb video. Thanks.
Hello TPAI, Very good narrative on the conversion process for lab power supply. You do quality work. Been looking for your uploads after teaser vid. Take care, be good, C.
I was walking to the store one day, and came across a projection TV on the side of the road. Didn't have any tools on me, but managed to rip all the good part out of it.
It was much like yours. Many big-ass heat sinks, caps, MOSFETS, Class-D 30 watt amplifiers, transformer, coils, etc..
The people driving by, must have though; "Look at that crazy dude, ripping into that set, like a badger".
Filed my empty shopping bags, and went back home with my new found treasure... :)
I actually went and built one of these! Never would have had the guts to do it without your video, thank you!
One of the best ways to do those front panel holes is a handheld nibbler or a miniature arbor press with square and circular punches. I still do the drill and file thing all the time but it's always such a pain. Great video!
Another awsome video!!
A thing that makes Your channel so strong is that You actually hawe knowledge even on the deeper plane not just scratching on the surface like most other channels.
I love all Your videos, no exception!
Sheep Ewe that's what i like the most about him 👍
Excellent! Looking forward to the next three parts. I've been collecting ready-made buck-boost converters, and other components, to make my own lab power supply. I have an old Pioneer AV receiver (VSX-D711-S) that I am ready to pull apart, no HDMI, so this build comes at just the right time for me.
Thank you.
Computer power supplies are also a great resource for parts, especially ones rated for both 110 and 220v. I have been building my own capacitor leakage tester based on youtuber M Caldeira's design, at first I thought I was going to need to purchase a bunch of the parts but I took apart an old ATX power supply and it had almost everything I needed for the circuitry, besides a couple potentiometers and 3 resistors. I was able to quickly produce a simple 0-330v linear supply at 30mA with very little hunting for parts.
Good to see you getting back into some serious projects now that things are more stable. Keep it up, I enjoy your power electronics projects.
I LOVE you!!! I find your videos incredibly interesting and helpful. I love how you articulate your thoughts so clearly and precisely. It's very easy to follow you. You stay on topic, don't stutter, lose your words or ramble off topic and that's rare these days as I watch other youtube vids.
Keep it up!!! Thank you for doing what you do.
That's a brilliant idea of re-using an audio amplifier as a linear PSU.. It can be extended to PSUs of smaller power by salvaging them from old midi, mini, hifi systems or portable tape players.
The power amplifier itself can be used to create an adjustable symmetric AC supply - or regenerator - or can be cannibalized to create linear regulators.
Your self-made equipment really has a LOT of Fallout flair!
This is awesome, just when I started to build something mildly similar and got a bit stuck between ideas, can't wait for the next part!
Great build and good use from the existing components !
Finally I found you!!! I knew I would find a sensai in exactly what interest me!
Now. I must sit listen watch n learn .
Carry on teacher I am here!
Impressive work
Great video, and I love salvaging old amps, working or not!
excellent stuff mate! in the process of building one myself out of an old CAT 5.1 receiver.
cheers for posting & it's good to see that you're back doing what you do best :)
My expectations are not high for CZcams electronics videos, especially ones about reusing junk parts, but this was great!
I'm waiting for all the parts to arrive for my own first PSU. Alot of salvaged parts here also. Power switch, enclosure for example. I'm not too used to working with mains voltages so all safety tips are helpful! Thanks!
Thanks, I have been needing a new power supply. This would be so much better then buying one... for me at least. awesome project.
I've learned so much from you/your vids! Keep up the great work! Thank you!
Very cool project. Looking forward to the next videos.
How did I miss this one? Great content !!
Looks like a very interesting project! Can't wait to see the rest.
Like for Zoid
HI! Really nice idea for alls, (myself included) who wants to built their own power supply from scratch or at lest repurposing old good electronics devices. When you show us the buck-chinesse-converters, was a little disapointed, but if you are going to built your own power regulators, this proyect could be amazing...!
Thumbs up from Argentina :D
I've been watching your channel for awhile now and just found this video and I'm THRILLED! It would be great if I understood as much as you but I'd really like to try this project as I have many of the parts already needed for it. Thanks for the inspiration & instruction!
Handsome work there. Nicely done.
i have a old 200w at power supply, that i converted to a lab power off it.
thanks for your time and info in this video.
Fantastic build.
Excellent video... I'm working on my lab power supply at the moment... so this video is very well timed and I look forward to the next parts. :) :) :)
Very nice work!
Great video, I really like your production and skills! Thanks!
Nice project and great video! I too enjoy reusing old equipment to make something new and useful.
I've been working on a Power Supply myself. I was planning to use two Transformers from a Guitar power amp with four huge massive filter caps. To keep things simple I was thinking to use two of those all-in-one digital Bucks/Boost converters that has a built in LCD and Micro.
Really nice job. I have an old not working ONKYO Amplifier somewhere.....and I need a nice power supply.....Thanks so much for the idea. :)
Nice amps that you restored you should do a video about them
Can't say enough great things about your channel!
great work my friend. really easy to follow and understand. I'm looking forward to the new video.
Just like you I have been using old amplifiers for power supplies. I have bought 4 German made Monacor 3 of which are the PA 900. The last amp however was rather a disapointment. The torroidal transformer was wound with aluminium wire. All of them had suffered due to overheating, rather strange as Monacor are rather proud of their unique cooling system. On one amp it was the device on the mother board that connected to the thermistor which detected over heating of the main TIP35C output transistors. In other words the safety device to stop overheating overheated. The 3 older PA 900 amps have a nice 300VA 27V AC transformer, large heatsinks, caps, and many usefull parts. I have made 2 linear at 36V DC around 8A, a 4 x LT1083CP linear and a 20A buck (nearer 17A) using 2 of the transformers switchable. All in one case with 8 thermostatically controlled fans. The wiring was a bl**dy nightmare. The Monacor cases are very heavy gauge steel, very nice.
still love your work. and thanks for the guidelines
very interesting video indeed. would love to watch the rest of it 👍
Very clever - very impressive, very attractive design. Wow
Hell yeah, this is super useful! Thanks for going through the trouble and making a tutorial for us.^^ Srsly, this is amazing!
Nice conversion.
Fantastic work there Mr. Apocalyptic. A low cost hole saw of the right diameter or the adjustable sized ones (more expensive but more useful) might've helped, but hey you got the job done. Also we incorrigible yanks say AAAAMPs instead of ampeeeeres. and ah-loooooomiiinum insteadof adding the extra non-existent syllable. Nice vid!
Oh, how I've missed your diagrams and excellent, clear explanations. The old TPAI is back - yay!
This is your best look. Vintage TPAI
like you said there is a faster way of cutting the holes in the aluminum but there is just something satisfying about doing the way you did. especially the filing metal it's relaxing :D
I've been spending my breaks at work, this week, filing aluminium and, I must say, I completely agree with you. :)
What is that faster way?
Hole saw?
If you are going to do a lot of holes, it's worth buying a set of Greenlee hole punches. It's much faster than drilling and filing a square hole.
A dremel would have gotten a fair bit of use.
Nice work on that power supply! And as for these modern receivers/amplifiers, they're so meh compared to the vintage stuff that it's no pity to take them apart if they fail. I've repaired a few of them too, sure... but I'm definitely more into the old stuff. Especially tube amps :).
Oh, and if you've got an aluminium panel, you can scratch it wet in one direction with a metal dish scrubber. This will give the surface a nice matte finish. Back in the old times I did it with sandpaper, but then I discovered that a metal scrubber is cheaper, handier and can do the job a lot faster.
Your videos are fantastic!
Realy cool video, greetings from bavaria !
Very good, I had gotten to the bridge rectifier and capacitors, but the voltage was 41VDC which was too high for the input of my LM338 linear voltage regulator, never thought about buck converters, had spent time looking for a preregulator circuit
Great video but when I first heard your voice the only thing that I could think of was Peter Sellers playing the part of the wheelchair-bound crazy German scientist in the movie "Dr. Strangelove"! :-)
Im very excited about your own buck converter, because right now I'm also building my own right now! I hope that you talk somewhat about feedback, unless you obviously used an Ic for PWM that handles feedback 😂
Beautiful work
1:35 omg that's a beautiful piece of tech! Why can't I find such beautiful HIFI? :X
You are very right. Stereo receivers are goldmines for components. Transformers, banana jacks, big caps, panel mounted potentiometers, MOSFETs, bridge rectifiers, knobs, and on and on. Many of my stock is from receivers. I even ended up with a pair of identical EI transformers with all laminations on the same sides, so I cut off both Is and joined the Es together for a 4 winding EE core that I will be using as my isolation transformer that has like a dozen other outputs as well (that I have no clue what I will do with...). The caps went into a bank added to my rectified welder. Sooooo useful...
Great work!! 👏👏👏
Love the look of that psu :-D, it looks old with those real meter movements :-D.
That amplifier was a perfect purchase.
Almost ideal parts too :-D.
I have made many linear psu's over the years, often from junkbox parts.
I know linear isnt very efficent, but easy to make and repair, and no hf noise.
hello from USA. you are great, love watching your videos.
That first Braun has such a classic beauty to it. Gorgeous just gorgeous. It looks like brushed aluminium. Maybe its rotary tumbled. I've no clue. Lol
Very nice job of salvage and convert; I guess in modern lingo: re-purposed. Looking forward to the next updated.
Cheers,
Mark
***********************
Project that's about making something from nothing, I LOVE IT !
Nice video, good project
good project build
Nice Vid, looking for next part :)
Great Vid ! Had a laugh when you said ¨ the two little PCB were fastened ..... with some adhesive " With that amount of glue you could stick an elephant to the ceiling !! Hot Snot would be faster and easier I guess.
really a nice work
Great start of Saturday with TPAI power electornics video. I'm planning to build Isolated Auto-transformer inspired by your earlier video, bought 1.5 kW toroidal Isolation transformer, damn, it weighs 15 Kg, now I cannot find suitable enclosure to carry it.
awesome! been looking forward to this for a week! 😀
I have everything to build this, except from the Amazon acquired components. However, I have access to a very large stock of antique, vintage and old school electronics most of which remains unsold in my family's business due to the fickle nature of the antiques and collectibles market! TPAI, I recently acquired phase angle control modules could these be integrated into this system in order to control induction motors?
look up "slip control"
that was awesome well done!!!!
cool!
can we consider this a continuation of the old SMPS series?
...you had me at bridge rectifier!
Thanks for the great video!
Love this channel 👍
great job
Waitin' for next video! :)
Te quedo muy prolijo saludos°!!
Sehr sympathischer Typ :)
subbed
Great job, no doubt!
I smell a SMPS tutorial part 6 coming😀
I look forward to your build with the power supply, when you're finish will the Power supply be clean enough to run audio equipment.
I need a poster of that Braun amp it's beautiful
Hey, Next time you need to cut plastic, with a "NON" variable speed rate jig saw, put isopropyl alcohol into a spray bottle, to squirt on the cutting area while cutting... yes, it is messy, but it does evaporate quickly, and the plastic doesn't melt to the blade.
look for 'NSM cd changer'.It's a commercial jukebox module, runs stepper motors at 24v. Should be cheap since they've often been replaced with mp3 players, thrown away like a television in some cases.
Was going to salvage it but decided to try to control it with a micro-controller first. It might be enough to make a 3d printer frame with a few specialty parts.
There are sooo many Sony units in use, good for you to repurpose a broken one! Great work as always! Liked
well , now i know what to do with my old Panasonic AMP / receiver that lost one of its surround channels . its full of heat syncs and a nice fat transformer . nice roomy case too .
great idea , especially how you decided to do the front plate . one tip , next time just use a hot knife to cut the ABS . its quick and cleaner . hot knife is about as smelly as a hot jigsaw blade .
Sehr gut! :D
nice and long video, i like it
Very Nice!!!!!
Ich bin gerade über deine Videos gestolpert und dachte erst, dass das wieder nur so ein kleiner reparier-kanal ist. Aber das sind durchweg schön gemachte Videos! Sehr interessant und prägnant durch die Bank :) werde mir definitiv noch mehr davon ansehen heute abend :D Greets aus Trier o/
very nice
You speak english better than most english do !!
I see those Buck converters and other stuff on Banggood.com. Depending on price, you have to be careful not to end up spending the same ammount of money on something thats going to be as cheap as what you can already buy on E-Bay as far as shop power units. Nothing against building your own power converter but when you start putting cheapo parts into your project,your are better off just buying one already assembled. My dad used to do that. I have seen some great deals lately on some really good quality power units on E-Bay. I understand building something is fun and all that but I am also into saving time and money.
You could have used a DPS5005, it has a nice interface and is easy to install and use. All in all great content and I can't wait for the next video.
Great video, thank you. I was wondering if the Vero board tracks would be thick enough for a current of 8 amps?