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 !!
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!
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.
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!
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... :)
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!
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.
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.
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.
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.
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
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'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!
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.
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.
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...
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.
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!
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!
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
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 .
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?
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.
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 :)
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.
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.
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.
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.
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.
Okay. So I made it to 4:40 for the video. I have two of these, and I've had half a dozen of them. Both the AVS and the power amps do the same thing on the Sony's, they lose a channel. The funny thing is, they don't blow the power amplifier transistor either. Everyone I've ever done has been minor repair with no parts replacement. But yeah expect one channel at least to be out and don't change the amplifier power transistor oh, there's nothing wrong with it.
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 😂
Hi TPI, could you explain the connection to ground of the bridge rectifier at 22:20, or to be more specific, the need to maintain the two left diodes (connected to ground) in the circuit? What would happen if you omitted these diodes plus (of course) the connection to ground? Sorry, if this is a stupid question - just a layman trying to make sense what's going on here.
I have one of those small chinese buck converters and it kinda works OK but the buttons are a pain to adjust.. I'd really appreciate a rotary encoder or potentiometer controlled one. Having that detachable control board is brilliant, though.
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/
I think this is one of the best designs of power supplies on youtube. But i don't understand why you have chosen to connect the secondary side to the chasis and make it mains earth referenced. I think your design becomes more versatile, if you don't do that, and use that as a regular, non earth referenced ground. What do you think?
I'm just wondering about the details of undoing the transformer secondary center tap and reconnecting so the two are in parallel - What wires go where? How to connect the now 4 wires from the original 3, so that there are two connections? If it's done wrong, then each secondary coil would have its 'input' connected to its 'output'. So, you check resistance to be sure yo have the correct ends of each secondary coil? Thanks in advance for more info!
Regarding the effect of reduced field current on motor speed; diesel electric locomotives reduce the motor field current in stages as the speed increases. Full field for maximum torque when starting from stand still and minimum field for high speed efficiency.
What do you think about creating an adjustable switching bench power supply? Should be able to at least use the entire primary side of a PC power supply, since it boosts voltage to over 300 volts. You could either make a new secondary side, or just upgrade the secondary side with higher voltage rated caps and whatever other components need upgraded. The power monitor chip is probably just powered off the 5 volt stand-by transformer. Should be as simple as hooking up your secondary side's output to a variable voltage divider so the the voltage monitor chip always see's 12 volts; and, when you dived the voltage more the actual output goes up. i guess to get less than 12, you could use a simple linear regulator.
@3:32 "This is not an AV receiver, because it doesn't have a receiver inside." Thank you. I can't count how many times I've had the "receiver" vs "amplifier" argument.
Got a really heavy, but near worthless amp given to me today. Has two rotary encoders and one of those fan ducted heatsinks. Multiple signs of overheating in the amps PSU section, so was never going to get fixed by me anyway.
i would prefer to use higher voltage like 60V for your dc dc converters and only use one single powerful unit for that and use lineard regulators in low voltage stage as preamp coils
Thank you so much for making this! Killing a Japanese amp?! I'm a long-time resident of Tokyo, but I'm not offended! Maybe I have a good chance of finding a quality trash amplifier! Quality trash amplifier... That's not a joke, I think. But the most important reason I love this video is: It's perfectly in my learning zone. I think I have commented on about 5 RUclips videos in my life, but I thought this one really deserved some encouragement. Please keep this project going. I am currently learning more about, and reinforcing, my base power supply knowledge. I am looking forward to the next episode, very much! Thank you again! 宜しくお願いします！
The second part to this video is now online:
ruclips.net/video/_CFIovMkRyg/видео.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.
This is back to your best like the old days, superb video. Thanks.
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!
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.
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!
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... :)
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 👍
I actually went and built one of these! Never would have had the guts to do it without your video, 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.
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.
Your self-made equipment really has a LOT of Fallout flair!
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.
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.
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.
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.
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'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!
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.
Great video, and I love salvaging old amps, working or not!
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.
Great build and good use from the existing components !
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...
My expectations are not high for RUclips electronics videos, especially ones about reusing junk parts, but this was great!
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.
Looks like a very interesting project! Can't wait to see the rest.
Like for Zoid
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!
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!
cool!
can we consider this a continuation of the old SMPS series?
Nice amps that you restored you should do a video about them
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 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.
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!
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!
Handsome work there. Nicely done.
Impressive work
This is your best look. Vintage TPAI
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 cool project. Looking forward to the next videos.
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
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 .
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"
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 nice job. I have an old not working ONKYO Amplifier somewhere.....and I need a nice power supply.....Thanks so much for the idea. :)
How did I miss this one? Great content !!
Can't say enough great things about your channel!
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 :)
Nice project and great video! I too enjoy reusing old equipment to make something new and useful.
Very clever - very impressive, very attractive design. Wow
Very nice work!
Fantastic build.
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.
Project that's about making something from nothing, I LOVE IT !
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.
Nice conversion.
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.
1:35 omg that's a beautiful piece of tech! Why can't I find such beautiful HIFI? :X
Oh, how I've missed your diagrams and excellent, clear explanations. The old TPAI is back - yay!
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.
Your videos are fantastic!
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.
Great video! I'm a complete novice about electronics and I had a pretty good idea what he was doing.
Really ? I do bet you don't even know the values (volts,ohms,farads..) no do you know the meaning of drawing symbols :(
+urdu learner
تم ایک بیوکوف ہو
Very nice job of salvage and convert; I guess in modern lingo: re-purposed. Looking forward to the next updated.
Cheers,
Mark
***********************
Te quedo muy prolijo saludos°!!
Great work!! 👏👏👏
You speak english better than most english do !!
Okay. So I made it to 4:40 for the video. I have two of these, and I've had half a dozen of them. Both the AVS and the power amps do the same thing on the Sony's, they lose a channel. The funny thing is, they don't blow the power amplifier transistor either. Everyone I've ever done has been minor repair with no parts replacement. But yeah expect one channel at least to be out and don't change the amplifier power transistor oh, there's nothing wrong with it.
very interesting video indeed. would love to watch the rest of it 👍
Realy cool video, greetings from bavaria !
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"! :-)
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. :) :) :)
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 😂
great work my friend. really easy to follow and understand. I'm looking forward to the new video.
still love your work. and thanks for the guidelines
Hi TPI, could you explain the connection to ground of the bridge rectifier at 22:20, or to be more specific, the need to maintain the two left diodes (connected to ground) in the circuit? What would happen if you omitted these diodes plus (of course) the connection to ground? Sorry, if this is a stupid question - just a layman trying to make sense what's going on here.
Can you please tell more about the adhesive you used? Like the name, brade, and where someone might find it.
Great video, I really like your production and skills! Thanks!
I have one of those small chinese buck converters and it kinda works OK but the buttons are a pain to adjust.. I'd really appreciate a rotary encoder or potentiometer controlled one. Having that detachable control board is brilliant, though.
good project build
I've learned so much from you/your vids! Keep up the great work! Thank you!
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.
There are sooo many Sony units in use, good for you to repurpose a broken one! Great work as always! Liked
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/
...you had me at bridge rectifier!
I think this is one of the best designs of power supplies on youtube. But i don't understand why you have chosen to connect the secondary side to the chasis and make it mains earth referenced. I think your design becomes more versatile, if you don't do that, and use that as a regular, non earth referenced ground. What do you think?
Nice way to salvage some scrap and save some money on an expensive enclosure and transformer !
I'm just wondering about the details of undoing the transformer secondary center tap and reconnecting so the two are in parallel - What wires go where? How to connect the now 4 wires from the original 3, so that there are two connections? If it's done wrong, then each secondary coil would have its 'input' connected to its 'output'. So, you check resistance to be sure yo have the correct ends of each secondary coil? Thanks in advance for more info!
Nice video, good project
I need a poster of that Braun amp it's beautiful
Regarding the effect of reduced field current on motor speed; diesel electric locomotives reduce the motor field current in stages as the speed increases. Full field for maximum torque when starting from stand still and minimum field for high speed efficiency.
What do you think about creating an adjustable switching bench power supply? Should be able to at least use the entire primary side of a PC power supply, since it boosts voltage to over 300 volts. You could either make a new secondary side, or just upgrade the secondary side with higher voltage rated caps and whatever other components need upgraded. The power monitor chip is probably just powered off the 5 volt stand-by transformer. Should be as simple as hooking up your secondary side's output to a variable voltage divider so the the voltage monitor chip always see's 12 volts; and, when you dived the voltage more the actual output goes up. i guess to get less than 12, you could use a simple linear regulator.
@3:32 "This is not an AV receiver, because it doesn't have a receiver inside."
Thank you. I can't count how many times I've had the "receiver" vs "amplifier" argument.
thanks for sharing. could one of these dc washing machine motors be used as a generator?
I love the look of those old Braun amplifiers. Any idea how I could get one in the USA?
Beautiful work
Hell yeah, this is super useful! Thanks for going through the trouble and making a tutorial for us.^^ Srsly, this is amazing!
Got a really heavy, but near worthless amp given to me today. Has two rotary encoders and one of those fan ducted heatsinks.
Multiple signs of overheating in the amps PSU section, so was never going to get fixed by me anyway.
i would prefer to use higher voltage like 60V for your dc dc converters and only use one single powerful unit for that
and use lineard regulators in low voltage stage as preamp coils
Thank you so much for making this!
Killing a Japanese amp?! I'm a long-time resident of Tokyo, but I'm not offended! Maybe I have a good chance of finding a quality trash amplifier! Quality trash amplifier... That's not a joke, I think.
But the most important reason I love this video is: It's perfectly in my learning zone.
I think I have commented on about 5 RUclips videos in my life, but I thought this one really deserved some encouragement. Please keep this project going. I am currently learning more about, and reinforcing, my base power supply knowledge.
I am looking forward to the next episode, very much! Thank you again!
宜しくお願いします！
Love this channel 👍