Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
Your technical knowledge of how switching power supplies function is probably one of the best. You sound like an engineer, thanks for sharing your knowledge.
I absolutely love your "cheap power supply breakdown" videos. Also your temperature measurements are very interesting. Definitely have to watch the following video about this power supply.
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
I think that diodes failed first, then the short circuit protection that is probably non existant didnt trip, then transistors went short, probably killing the bridge rectifier and the fuse and tripping the breaker.
maybe instead of primary transistors, it was diodes that failed as they look rated for less current than transistors. other than that I would bet on the same thing as you ;)
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
Great video! To be honest I didn't expect it to fail after an hour. My guess was that it would either fail immediately, or actually work for a long time. So this was an interesting outcome.
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
6:46 hmm those big smoothing caps look diff to the ones @ the beginning of the video 🧐🧐 & what’s that red rubber tubing thingy lodged in between the case mounted diodes & that metal plate ? Looks like a piece of wire sheathing 🤔🤔
i've build a strong 2.1 loudspeaker. My choice was a 24V 10A switch power supply vs 6 on data sheets. It's to compense slew rate regulation and current limits. A classic transformer is heavy, low efficiency, but more fast on strong current needed. You post great vids! Continue!!
I have one of these I used for an LED grow light experiment. First thing I noticed was the fan was wired direct, not temp-controlled. I want to go back in and see if I have some dodgy caps as well lol. Anyway, the Chinese love to quote peak values in their specs without calling the duty cycle. So, whenever I buy something like that from eBay or whatever I cut their specs in half when sizing. I'm looking forward to the analysis video.
Bought 2 of them in different power but the low power have large heatsink with tiny fins on it while the high power have small slab of aluminum. Also fake temperature controlled fan. Haven't tried at full load yet.
I always say for these cheap ebay/aliexpress electronics, continuous rating is usually half what is claimed, so this was 'actually' a 300W continuous power supply and 600W peak.
Saves on a high power capacitor in series with the transformer primary to handle the flux walking, that would otherwise result in DC current flow, and also allows higher power operation as the transformer is acting not as an energy store, but you get energy transfer with each cycle.
Well I bought one like this one months ago after you video with the both legs of the capacitor n the same hole. I re soldered several (well mostly all) of the solder joints, reseated some stuff and took the silicone pads and trashed them. Drilled holes for the transistors & mosfets used new mica separators and bolts & nuts to fasten them to the case, new compound too. I have not had any issues with mine but I don't run it at 50 amps either. Lol I'm guessing the transistors went poof or the transformer had a meltdown... No expert just my thoughts... Thanks for the video! LLAP
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html WATCH THIS AND FIND OUT !!!
Do you have a mains power meter to measure the power going into the power supply? Direct input/output watts would be interesting to me. Thank you for your videos.
60°C is not a hard rule. The hard rule is that you absolutely cannot cross 150°C Tj, and you're best advised staying at least 20° below it. Thermal pain threshold sets in about 55-60°C, and as a rule of thumb, if you're not above that, you can trust those semiconductors not to be under too much stress - with some exceptions where the device is known to be extra susceptible. If you are above 60°C, then you have to think long and hard about thermal impedance chain and real Tj, and as a rule, you probably don't want it to get there if you have much say in it.
I ordered one of these switch mode power supplies off aliexpress just last Friday for a friend. We plan to build a 18650 battery charging station for 100 batteries at a time. I hope it doesn't give up on me like this. I got the 5V 60A 300W version.
Unless it's meanwell one (which is a solid brand) LRS-350-5 - it'd be worse than this. The wattage is not that important (it does affect the primary) but 60A is a lot of current for the secondary - diodes, coils, transformer and the caps (likely the traces as well) You might as well enjoy the fireworks.
@@stanimir4197 Thanks for the heads up buddy. Lets just hope things doesn't end in tears for my friend and i. I will get one of the meanwell types and try that too. cheers!!!
He did not. Flyback topology power supplies are limited around 100-150W, but a 2-switch forward converter like this can go higher. It also becomes too inefficient at some point of course.
25A is a lot easier to delivery, yet zero reasons to use a cheap power supply and worry about frying all electronics or burning your house down. The dumbest thing to save money on is the PSU. Meanwell is a non-expensive brand that has a wide range of power supplies (this one looks a knock off of some them). The modules that I have use rubycon caps. OTOH if it uses half the power it might run okay.
haven't seen your next video yet, going to watch it now! but id say the secondary diodes failed going by what you were saying at the end.. anyway we'll see in the next video now.. : )
There are unpopulated elements on the center of the smps, left below the transformer. Can you please tell me what they are used for? I have the same unused spots in my power supply and i am very interested in their function or what can be connected there. One of the labels is "cn2" on my PCB. Like a connector for a Fan with lower voltage? My supply is 24V.
Nice work Interesting how that cheap power supply can go up to 50 Amp in one hour. I hope i can get the same one. May be I will replace the diodes and adding another fan horizontaly inside the box
Very nice test review! It nearly passed :-) You could also have measured the temperature of the Output-Choke, output caps. The Choke looks like wired with copper coated aluminium - as always in cheap china ware... Please also do a output voltage modification (variable voltage from 0...15V maybe?)
I think one of the diodes failed or both, and later the transistors failed, the fuse blew and the breaker tripped! Maybe the bridge rectifier is also damaged...
The output choke wire doesnt look like for 50A , are they 2 in parallel? I wonder how many current density the choke wire and transformer wire operate.. 100degree is no good , most of diode having 175C of junction temperature and junction to case need about 50C at least for full load i think and Case to casing also another temperature resistance. so if casing go up 100C i guess the junction almost 175C.. maybe the highest casing temperature for safety is 80C?
My atx power supplies standby ic TFC 718Shas failed. Its vcc is 5v . My transformer has Auxiliary widing voltage can't meet the requirement.Because its 5v. Can you suggest any pwm ic with vcc 5v inbuilt mosfet and the feedback voltage is less than 5v. I tried TOP244YN but its FB pin voltage is 5.8v and more. The oscillator frequency is 61khz
Really love your video, in detail about explanation topology and how they work. Can I know which is better of efficiency this 2-switch forward topology and the other like flayback or half-bridge and maybe full-bridge topology
That vertical toroidal core in the middle looks really sketchy. Why is it so dark and yet shiny? I've not seen a core like that before. I recently built something where I used an iron powder core rather than ferrite by mistake and the core actually started melting the insulation of the winding. It wasn't the wire itself that got hot, because the insulation was melted specifically where it came in contact with the core! The yellow paint also burned and turned dark brown.
Thank you for all the beautiful videos about this power supply model. I have one that i'm installing in my boat as a supply for my 12v onboard sistem when i'm port plugged to the 230v net. Looking at the test made me worried about the possible consequences of supply failures so i'm installing the following protections: 1) thermostat in the fan circuit as i dont want it to run taking power from boat batteries when the power supply is in idle. The fan will power on when the diodes reach 50° 2) thermostat breaking the 230V line in when the diodes reach 80° 3) 40A Circuit breaker in the 12v line out 4) Everything will be put inside an electrical junction box (only holes for fan and air ventilation) Do you think it will work fine? Thank you
In my smps s-360-12 30A Voltage significantly drops when load connected i think pulse width modulation not working properly or there is very weak power transistor used inside Whats your idea.any suggestions or modification? I found the problem Im sorry I loaded the smps with test lamp connected. Removed it and everything fine Thank u
First rule of Chinabuy club: do not trust it with your life. Second rule of Chinabuy club: reduce the specs by 50%. Third rule of Chinabuy club: apply extra heatsink.
At low voltage high current power supply, secondary diode gets most losses. But even if they fail, they should not pull the primary side down. Diode fails as open. If transformer winding shorts due to heat, it may cause failure of primary side semiconductor and then trip of mains breaker.
Ceramic filled, thermally conductive, electrically insulating silicone. Colloquially called Sil-Pad, though that's actually a brand, and it's fairly different from generic stuff. Well thermal conductivity of these things is anything but great really.
I noticed the current reading was decreasing throughout your 50 amp test. Was the voltage falling as the supply heated up or was it something else like the heater resistance drifting?
I look forward to the autopsy and hopefully the repair. Your troubleshooting videos are very helpful.
Aah, you spoiled the ending.
@@mogoreanu Sorry. I thought the thumbnail would be spoiler enough.
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
Breadboard thermometer: it's getting hot in here 😅
"The result probably wasn't a surprise" - Actually it was, I was expecting it to blow much sooner! I'm looking forward to the repair!
I think this sums up what we all expected:
ua-cam.com/video/t9wmWZbr_wQ/v-deo.html
Your technical knowledge of how switching power supplies function is probably one of the best. You sound like an engineer, thanks for sharing your knowledge.
I absolutely love your "cheap power supply breakdown" videos. Also your temperature measurements are very interesting. Definitely have to watch the following video about this power supply.
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
I think that diodes failed first, then the short circuit protection that is probably non existant didnt trip, then transistors went short, probably killing the bridge rectifier and the fuse and tripping the breaker.
maybe instead of primary transistors, it was diodes that failed as they look rated for less current than transistors. other than that I would bet on the same thing as you ;)
@@ZinovaS Thats what I said, diodes - transistors - bridge - fuse - breaker...
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
@@thearchetype9829 Y U Promoting videos in someone's coment section?
@@filenotfound__3871 i was talking about free-wheeling diodes near the switching transistors instead of transistors themselves
Yesss! True to the title: DIODE GONE WILD!!!!!
DiodeGoneWild: [Turns on power supply]
Power Supply: Goodbye, cruel world!
lolll
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
🤣
I'm glad you found proper replacements for those wax filled capacitors.
The smell coming from heater, lamps, power supply or maybe my thermometer!🤣🤣🤣🤣
Maybe it was the tape that held the temperature sensor to the diodes
Me: Sees DiodeGoneWild video with "Full load test" and high Power values in title
Also Me: Puts the world on hold to go see 😂😍😆😂
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
33.like
I am disappointed you did not add EVEN MORE SAAAAAALT
You are making this as a suspense thriller series, eagerly waiting for the autopsy.
These videos are pure gold!
Great video! To be honest I didn't expect it to fail after an hour. My guess was that it would either fail immediately, or actually work for a long time. So this was an interesting outcome.
I expected it to output at most 100 watts, to be honest.
My love from india, i have visited your website before 6 years . My interest is your language , your scimatic analysis. , 😃😃😃😃💪💪💪
hmm, the 2 big capacitors are different at the beginning and the end of the video and different than the original ones...
Fake?
See the previous video on this PSU...
He just removed the covers from them
Even more LAAAMPS
lol
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
@@thearchetype9829 no f you
Did you changes again those main capacitors? 🤔
6:46 hmm those big smoothing caps look diff to the ones @ the beginning of the video 🧐🧐 & what’s that red rubber tubing thingy lodged in between the case mounted diodes & that metal plate ? Looks like a piece of wire sheathing 🤔🤔
Diode gone wild must have fixed the failed power supply to complete the video.
The repair will be explained in next video I guess.
@@neduodumbu1969 that’s probs it 😬😬
i've build a strong 2.1 loudspeaker. My choice was a 24V 10A switch power supply vs 6 on data sheets. It's to compense slew rate regulation and current limits. A classic transformer is heavy, low efficiency, but more fast on strong current needed.
You post great vids! Continue!!
I love these videos! Been a long time fan! Thank you for your content.
That short circuit was cool ;)
I have one of these I used for an LED grow light experiment. First thing I noticed was the fan was wired direct, not temp-controlled. I want to go back in and see if I have some dodgy caps as well lol. Anyway, the Chinese love to quote peak values in their specs without calling the duty cycle. So, whenever I buy something like that from eBay or whatever I cut their specs in half when sizing. I'm looking forward to the analysis video.
Can’t wait for the next video! 😉
Analýza závady a pitva trafa bude určitě zajímavá.
Bought 2 of them in different power but the low power have large heatsink with tiny fins on it while the high power have small slab of aluminum. Also fake temperature controlled fan. Haven't tried at full load yet.
Now this is going to be interesting!
I love your accent it's makes me happy :)
It's not fair, you covered the rectifier heatsink area with tape!
i have power supply like this. But there are used 13009L transistors. Transistor has burnt. Can i use mosfet ?
No
Wasn't the heater adding to the temp of the power supply?
I always say for these cheap ebay/aliexpress electronics, continuous rating is usually half what is claimed, so this was 'actually' a 300W continuous power supply and 600W peak.
What is the advantage of this topology against a half bridge?
Saves on a high power capacitor in series with the transformer primary to handle the flux walking, that would otherwise result in DC current flow, and also allows higher power operation as the transformer is acting not as an energy store, but you get energy transfer with each cycle.
So really this is a decent power supply if you're only pulling 30 amps max? Looking for a decent 12v psu
Well I bought one like this one months ago after you video with the both legs of the capacitor n the same hole.
I re soldered several (well mostly all) of the solder joints, reseated some stuff and took the silicone pads and trashed them. Drilled holes for the transistors & mosfets used new mica separators and bolts & nuts to fasten them to the case, new compound too.
I have not had any issues with mine but I don't run it at 50 amps either. Lol
I'm guessing the transistors went poof or the transformer had a meltdown... No expert just my thoughts...
Thanks for the video!
LLAP
Waiting for this 😍
remove the fan grill and mount the fan outside the case(sucking). will help for better cooling.
I hope you measure inductance of those main transformer and gate drive transformer soon on your schematic's video 🙂
first time i saw it i thought no way this tiny power supply can give 50 amps, i was surprised it last over half an hour
Wow !..you really gave that supply a damm good salting...cheers !
Hello there HOW DOES A NEON LAMP WORK ??? WHAT ARE GAS DISCHARGE TUBES AND WHAT IS NEGATIVE RESISTANCE IN NEON LAMPS ?ua-cam.com/video/g01ovsm-Pd0/v-deo.html
WATCH THIS AND FIND OUT !!!
@@thearchetype9829 reported for spam
Did the magic smoke stay inside?
I hope you measure inductance those main transformer and gate drive transformer soon on your schematic's video 🙂
I've been following your channel for about a year and your
Do you have a mains power meter to measure the power going into the power supply? Direct input/output watts would be interesting to me.
Thank you for your videos.
Looks its still hard to find PSU over 200W on ebay which has active PFC :D
Diode gone wild : breaks the warantty void if removed sticker.
Me : if the supply fails?
Diode gone wild: blody heeelll
Thats weiieerd.
WOW. 50 amps. Impressive even for an hour.
IIRC, silicone components (diode, transistors, etc.) mustn't allowed to go beyond 60C, their maximum "healthy" working temperature is supposedly
60°C is not a hard rule. The hard rule is that you absolutely cannot cross 150°C Tj, and you're best advised staying at least 20° below it.
Thermal pain threshold sets in about 55-60°C, and as a rule of thumb, if you're not above that, you can trust those semiconductors not to be under too much stress - with some exceptions where the device is known to be extra susceptible. If you are above 60°C, then you have to think long and hard about thermal impedance chain and real Tj, and as a rule, you probably don't want it to get there if you have much say in it.
at the end of the movie there are exchanged primary smoothing capacitors :) I assume they were damaged during the test?
Yeah true!!
So excited for the analysis! (and possibly repair ;) ) Such an interesting exercise to abuse these cheap power supplies.
Would you know the value of the first inductor before the bridge rectifier ? It’s part of the filter
I ordered one of these switch mode power supplies off aliexpress just last Friday for a friend. We plan to build a 18650 battery charging station for 100 batteries at a time.
I hope it doesn't give up on me like this. I got the 5V 60A 300W version.
Unless it's meanwell one (which is a solid brand) LRS-350-5 - it'd be worse than this. The wattage is not that important (it does affect the primary) but 60A is a lot of current for the secondary - diodes, coils, transformer and the caps (likely the traces as well)
You might as well enjoy the fireworks.
@@stanimir4197 Thanks for the heads up buddy. Lets just hope things doesn't end in tears for my friend and i.
I will get one of the meanwell types and try that too. cheers!!!
@@Delali You're welcome. I'd absolutely not mix unreliable (even slightly) power delivery with Li-Ion.
You have said that switching power supply like this is can only handle below 200w but in this case it is 600w how , can you explain?
He did not. Flyback topology power supplies are limited around 100-150W, but a 2-switch forward converter like this can go higher. It also becomes too inefficient at some point of course.
@@Basement-Science ok 👌 i got it
I have learned so much engineering from this channel thanks you sir .. u are a legend.
Even more saaaaaalt.
Oh sorry wrong video
You are a follower of "The Salt"...greetings !
Thanks for sharing and explaining detail maximum power it could handle . So it is safe and last longer about 20A in my opinion
I was going to put its 24V version (25A ) in a 3d printer and now I'm thinking if mounting it on the heatbed would be better for it.
25A is a lot easier to delivery, yet zero reasons to use a cheap power supply and worry about frying all electronics or burning your house down. The dumbest thing to save money on is the PSU. Meanwell is a non-expensive brand that has a wide range of power supplies (this one looks a knock off of some them). The modules that I have use rubycon caps.
OTOH if it uses half the power it might run okay.
so what happens with capacitor put on the same leg? are changing them? or the manufacture put it intendly?
haven't seen your next video yet, going to watch it now! but id say the secondary diodes failed going by what you were saying at the end.. anyway we'll see in the next video now.. : )
Thnx for videos. I think it would be a good idea to check the solder joints around the parts that got hot. I hate losses to heat, wasted power. 👍
Aww, he didn't have the "fire extinguisher" handy this time. Was kind of expecting it considering how dodgy this thing was.
That would be a bad idea when dealing with rectified Mains Voltage.
What are the silicon pads used for exactly? Aren't they just reducing thermal conductivity
Could you do a tear down of a Crosley record player, please.
2:22 does your plug also have a hole at the bottom for the ground pin?I have seen some polish non-polarized grounded plugs with 2 holes.
what are the tubes under the diode clamp? I bet they melted and the diodes came off
There are unpopulated elements on the center of the smps, left below the transformer. Can you please tell me what they are used for? I have the same unused spots in my power supply and i am very interested in their function or what can be connected there. One of the labels is "cn2" on my PCB. Like a connector for a Fan with lower voltage? My supply is 24V.
Nice work
Interesting how that cheap power supply can go up to 50 Amp in one hour. I hope i can get the same one. May be I will replace the diodes and adding another fan horizontaly inside the box
Very nice test review! It nearly passed :-) You could also have measured the temperature of the Output-Choke, output caps. The Choke looks like wired with copper coated aluminium - as always in cheap china ware... Please also do a output voltage modification (variable voltage from 0...15V maybe?)
The Diodes Went Wild.
I think one of the diodes failed or both, and later the transistors failed, the fuse blew and the breaker tripped!
Maybe the bridge rectifier is also damaged...
The output choke wire doesnt look like for 50A , are they 2 in parallel? I wonder how many current density the choke wire and transformer wire operate.. 100degree is no good , most of diode having 175C of junction temperature and junction to case need about 50C at least for full load i think and Case to casing also another temperature resistance. so if casing go up 100C i guess the junction almost 175C.. maybe the highest casing temperature for safety is 80C?
Diode please tell us about the soft star circuits ( or pin )in dc dc converters
I asked you what the part number for the two NTCs used are, and no reply!
If you're not a patron, you can suck it.
He never answers questions on YT.
He can't be bothered with you peasants.
they are marked 5D-15, two in parallel. They are 5 ohms cold.
@Joachim Shekelberg It was like pulling teeth!
"no explosion yeeeeeeeyt"
Can you tell us how to calculate ferrite transformer,
My atx power supplies standby ic TFC 718Shas failed. Its vcc is 5v . My transformer has Auxiliary widing voltage can't meet the requirement.Because its 5v. Can you suggest any pwm ic with vcc 5v inbuilt mosfet and the feedback voltage is less than 5v. I tried TOP244YN but its FB pin voltage is 5.8v and more. The oscillator frequency is 61khz
I can't find the exact thermometer model on your website. Can you send me a link to schematic please?
Ya shure ya betchya. One,One power supply , ah ha hha ha . Thanks for posting ya !
Really love your video, in detail about explanation topology and how they work. Can I know which is better of efficiency this 2-switch forward topology and the other like flayback or half-bridge and maybe full-bridge topology
That vertical toroidal core in the middle looks really sketchy. Why is it so dark and yet shiny? I've not seen a core like that before.
I recently built something where I used an iron powder core rather than ferrite by mistake and the core actually started melting the insulation of the winding. It wasn't the wire itself that got hot, because the insulation was melted specifically where it came in contact with the core! The yellow paint also burned and turned dark brown.
I wouldn't dare to take more than 10 A from such design
Thank you for all the beautiful videos about this power supply model. I have one that i'm installing in my boat as a supply for my 12v onboard sistem when i'm port plugged to the 230v net. Looking at the test made me worried about the possible consequences of supply failures so i'm installing the following protections:
1) thermostat in the fan circuit as i dont want it to run taking power from boat batteries when the power supply is in idle. The fan will power on when the diodes reach 50°
2) thermostat breaking the 230V line in when the diodes reach 80°
3) 40A Circuit breaker in the 12v line out
4) Everything will be put inside an electrical junction box (only holes for fan and air ventilation)
Do you think it will work fine? Thank you
In my smps s-360-12 30A
Voltage significantly drops when load connected i think pulse width modulation not working properly or there is very weak power transistor used inside
Whats your idea.any suggestions or modification?
I found the problem
Im sorry
I loaded the smps with test lamp connected. Removed it and everything fine
Thank u
First rule of Chinabuy club: do not trust it with your life.
Second rule of Chinabuy club: reduce the specs by 50%.
Third rule of Chinabuy club: apply extra heatsink.
Second rule: Don't turn it ON, take it APART. There is probably no QC, you are the QC.
At low voltage high current power supply, secondary diode gets most losses. But even if they fail, they should not pull the primary side down. Diode fails as open. If transformer winding shorts due to heat, it may cause failure of primary side semiconductor and then trip of mains breaker.
"Diode fails as open" - hmm I thought the most common failure mode is 'shorted' and they burn themselves afterwards to open (or trip the breaker)
@@stanimir4197 Refer to the new video posted by DiodeGoneWild, I was correct.
Would this power supply not work better with much better cooling?
You did it wrong: you tested at 50Amps!! thats about 100 chinesAmps
This comment deserve a lot of likes
AvE reference?
Always derate anything that is cheap from that country, so if it says it’s rated at 600W, divide by 2 to give a true continuous rating of 300W....
Just what is the rubber pad for on the heat sink ?
Ceramic filled, thermally conductive, electrically insulating silicone. Colloquially called Sil-Pad, though that's actually a brand, and it's fairly different from generic stuff.
Well thermal conductivity of these things is anything but great really.
Excellent video!
I fully expected it to go up in flames the instant you turned it on
6:38 Nope, not suprised
1) the PSU stopping
2) the breaker tripping
3) The cat fitting in the box
4) The cat turning his/her back to the camera
You are making very good videos. Will You making microcontoller programing videos in the future?
Hey, can you review and test one of those cheap generic Chinese radios? You know, the ones like YG-16U.
I had one of those and I would run it at 50 amps all day no problem. Used it to power a huge lipo battery charger.
I noticed the current reading was decreasing throughout your 50 amp test. Was the voltage falling as the supply heated up or was it something else like the heater resistance drifting?
I like your test smps please sales link ?
Can I run with hho generator.
I am waiting for Ptopsy :D
.. and the cat scan.
@@AndyHullMcPenguin bether MRI 🤔😂🤣
Even more laaaaamps... The bench is on fire now... Even more laaaamps... The whole house is burning now... EVEN MORE LAAAAAMPS...
And of course EVEN MORE SALT!!!
It has no PFC?!