You have hit a strong method. You’re going from passive to active teaching. Like the difference between lecture and lab work. Bravo. You have a winner for your deep skill level.
You hear that such a type is good for such an application... I always think "ok... but why?".... well Mr Gone-Wilde explains a few of my "whys" here.... he's a champ!
Fire away, he does answer intelligent questions.... like: At the +5 volts output the buck regulator is connected through a single 1N5819 diode. Is that all that stand against a reverse voltage being fed back into the 12v regulator from the mains side?? what would happen if somehow you were able to plug it into both mains and the 12V supply? I'm guessing the voltage would stay at 5V but the amperage would increase.
@@DiodeGoneWild good deal. My testers I have to discharge the device under test first. I know some nice meters have a sensor and a relay in them to discharge devices before testing them.
@@edgeeffect some meters can handle charges, some cannot. Personally I do not see any reason to try to measure a charged device. I am only interested in the value of the component.
Excellent video DGW! I pick up beautiful dead flat screen tv's here or there or when I install new ones for friends...... most of the time it is bad capacitors, the pain in my ass is finding replacement capacitors....... they have to be low esr, if you read the forums you have noticed people saying they opened their tv's and found the bad caps, gotten excited and ordered new ones only to be told they are not low esr....... My request is for you to make a video on data sheets so we can order the right capacitors. Love your Channel
In case of series-parallel combination of inductors, for applying the same formula as that of resistors, you must have to make sure that the inductors are not magnetically coupled to each other in anyways. Otherwise, formula might give unexpected results. For example, in case of two oppositely coupled(coupling coefficient=1) inductors having same inductances(say L), the net inductance in their parallel combination would be zero, instead of L/2(according to the parallel formula).
This was a fantastic instructional video. I have a couple of questions about putting together a filter board to clean up ripple from my cheap 30v 10A bench power supply but I’ll ask them over on Patreon.
Really good video as always and right on time! I've been trying to repair a psu with a fet as a switching regulator and seems the capacitors around it are not rated for the task, it makes a clicking noise and no voltage at the output. Thanks a lot!
100kHz is at the maximum operation frequency of the device. They tend to work better at about half that, need to recalculate the inductor and check that they even used an appropriate value in the first place; I've seen a few similar supplies that haven't.
I love how you took your time to "make it better" , could be a new series for you... Do you think the original manufacture failed to do so due to cost or lack of understanding of the way it worked. It doesn't seem like cost would be much of a factor to make it better
I would say that is most likely a cost-saving measure. Good electrolytics from a company like Rubicon for instance will cost around five times more than the ones that they used in there. You get a lot of things like this that I've been made based off of schematics in data sheets, but the person making them or company making them just uses the cheapest stuff they can inside. ^^;
Very nice. That ESR meter measure the impedance of the capacitor at 100KHz. I think it will be better to use 2 frequencies, 100KHz and 50Hz to measure the capacitor impedance.
We all make mistakes, the blue body multiband resistors often get confusing and hard to read because of the blue background and fading eyes. Using gold or silver for different things than tolerance trip me up. Thankfully there is always a multimeter near :-D. I've used the reciprocal resistor calc with minus instead of plus, for a reversal.
Sometimes if I don't take a close look, the silver and gold looks the same. Both is just shiny the same way, especially in dim light or warm white light.
Daylight gives the best colour as its full of frequencys, unlike man made light that has parts of the spectrum missing. Old 4-5 band resistors when run close to there limits darken, so every colour gets muddy and really hard to read. Who decided that a blue body resistor was a good idea :-(
Awesome follow up! This format is just a superb teaching tool. Probably takes forever to make but these are my favourite style. What kind of cat do you have?
Thanks again for yet another very interesting video! It’s shows that with only a few components this simple charger can go from horrible to reasonable. Could you perhaps also give an indication of how much this would add to the production costs? It’s a pity how lowest price competition drives the manufacturers of these products to skim on really every component where the can.
The tantalum capacitor would add a lot of cost. Those are about 10x more expensive than the electrolytic ones. I'm not sure how much does it cost in big quantities, but 1piece from a trusted supplier may cost about 1.50 USD. The big low impedance electrolytic capacitor would also add a lot of cost.
I've used the schematic of you're DIY ESR meter to build one that allows to plug a DMM with uA scale by tuning R1 and R2 and works pretty nice. Not the best accuracy but it matches the reading of a 1uF cap on a LCR T4 meter :D .
you know the neighborhood mice have gone together and paid your cat to get in your way doing these videos? I am just a 67 year old fart who is trying to tech himself electronics.. your site is way over my head but there is something in the way you teach it that I can follow along and understand what you are saying and learn some very good things along the way.. thanks for all of your video shares.. carry on I look forward to your next one..
At the +5 volts output the buck regulator is connected through a single 1N5819 diode. Is that all that stand against a reverse voltage being fed back into the 12v regulator from the mains side?? what would happen if somehow you were able to plug it into both mains and the 12V supply? I'm guessing the voltage would stay at 5V but the amperage would increase.
It will be a big loss if not to watch any one of your videos. Thank you so much for such in depth explanation about types of capacitors and their applications in different areas. Impressive!!
It uses a very low voltage for the measurement. This doesn't damage the capacitor. It's well below the voltage drop of diodes and other semiconductors, so you can also measure the capacitors in the board. In most cases, the measurement is not affected by the other components connected to it.
12:24 I am watching your channel for almost 1 year. Because of your accent sometimes i doesn't understand your words(but still its good). for all these days what you are saying was 'dodgy' which i hear as dochy. 😂😂😆
That's why i have added small ceramic capacitor in parralel to a bigger electrolytic capacitor in my LC filter circuit for a MOSFET driver, apparently that makes sense. But i'm not sure if the higher ESR of cheap electolytic capacitors affects that much on lower frequencies. My circuit uses 13.33kHz PWM and without LC filter the MOSFET driver affects a lot on the microcontroller which makes the PWM signal. So do i need to add a ceramic capacitor on frequencies as low as 10-20kHz ?
I think that you need a ceramic capacitor at any frequency, it works with a square wave (switching circuitry). In switching circuits, it's not about the frequency, it's about the things that happen during the transistor transition from on to off and back. All that ringings, overshoots, ....
thx for your help to understand these circuits ... can you help me to increase output current as the circuit heatsup very quickly when smartphones connected...i tried to convert dual transistors circuit (13003,945) smps to operate over 12v but it only gives low amp. o/p
You are a great teacher! Can you show how to connect a Power Mosfet at the output to increase current capability of the circuit? Thank you again so much for your great tutorial. Like Ted said "You are one of a kind"! RJM
Great video. Never trust cheap Chinese electrolytics, i recently bought 1000uF 35V low esr "Sanyo" caps, and looking at the datasheet, these should be much larger than ones i received. They are 1000uF 35V but the esr and "Sanyo" is rubbish. As for the obsolete chip, there are cheap buck and boost regulators for cheap, but they as well come with too low capacitors that are rubbish. I was running a 12V to 5V LM2596S module at 1A and both input and output 330uF caps were too hot to touch after just a few minutes. So i totaly recommend those modules, but always switch the caps to a legit branded low esr capacitors, and also, look at the datasheet for the control chip. The LM2596S recommends 1000uF at the output for dropping to 5V and the modules come with rubbish 330uF, so no wonder they were getting hot and the chip was squealling the whole time.
Also, my local electronics store has "low esr" category but also has "High frequency" category which are more expensive but are obviously meant for high frequency switching.
I had a bunch of those LM2596 modules and they turned out to be rebaged LM2576 or similar since they were running at 52khz and not the 150khz of LM2596. No wonder I was getting so much ripple.
There is also a great video explaining just the reason why to connect multiple capacitors in parallel instead of one big capacitance capacitor: th-cam.com/video/wwANKw36Mjw/w-d-xo.html
Some one help me My phone getting some AC current while charging. How to fix this some one told me to removing capacitor between primary and secondary on board
Yes, this chip is definitely not the most efficient. The Darlington transistor makes it drop quite a lot of voltage. A MOSFET would drop way less and dissipate just a small fraction of the power. But if I put a different chip in it, it would no longer be a modification, it would be a completely new device :). The point of this video was just to improve it a little bit and to demonstrate some basic things.
Janus Kobain I didn’t want to splice the cat. No way! I meant it’s better to have the cat besides the circuit (in series) than on top of it (in parallel).
![ว้าว!ลุงบีมแบกทองมารับขวัญหลานกันยกบ้าน [cc] แดนแพทตี้ SS2 | EP.49 |](http://i.ytimg.com/vi/Osihq1OAs-4/mqdefault.jpg)
You are one of a kind when it comes to these instructions videos!
Great works, and really you pinpoint the schematics well 💪
Choosing right capacitor was very complicated to me.. now you just taught me everything important..
Thank you DiodeGoneWild.. 👍👍
Now if DiodeGoneWild could give us a lesson about the different diodes. ;D
You have hit a strong method. You’re going from passive to active teaching. Like the difference between lecture and lab work. Bravo. You have a winner for your deep skill level.
Thank you for the capacitor lesson and where when and why different capacitors are better for different purpose
You hear that such a type is good for such an application... I always think "ok... but why?".... well Mr Gone-Wilde explains a few of my "whys" here.... he's a champ!
If i get a teacher like you in my Childhood when i had lot of Questions !
Now i get the answers .
Thanks
Fire away, he does answer intelligent questions.... like:
At the +5 volts output the buck regulator is connected through a single 1N5819 diode. Is that all that stand against a reverse voltage being fed back into the 12v regulator from the mains side?? what would happen if somehow you were able to plug it into both mains and the 12V supply? I'm guessing the voltage would stay at 5V but the amperage would increase.
Always a pleasure to to watch your videos
Outstanding video!!!!! Thank you sir.
I love your videos, I always learn a lot from them!!
Good job man! And thanks to the person how donate you that ESR meter!
was well given. he deserve.
he knows a lot and he like to share the knowleadge.
As always from that Czech guy a awesome educating end entertaining video - 1000 Tnx !
Enterntaining and informative videos, keep up the good work!
Cat says so complicated mathematics here every this is goes out of my mind
Very nicely explained and pin pointed at every important thing.
I specially like the latest videos, with lots of new teaching and good info !
I've been waiting for an another video.
Ah. Thanks.
Extremely clear explanations and follow through.
Discharge capacitors before you hook them to your fancy ESR meter. Some really fancy meters do it for you. Yours might not be quite that fancy though.
The ESR meter contains 2 antiparallel Schottky diodes at the input.
@@DiodeGoneWild good deal. My testers I have to discharge the device under test first. I know some nice meters have a sensor and a relay in them to discharge devices before testing them.
It is designated as an "in circuit" meter... ... ... isn't it?
That should be good for working on charged-up caps???
@@edgeeffect some meters can handle charges, some cannot. Personally I do not see any reason to try to measure a charged device. I am only interested in the value of the component.
Excellent video DGW! I pick up beautiful dead flat screen tv's here or there or when I install new ones for friends...... most of the time it is bad capacitors, the pain in my ass is finding replacement capacitors....... they have to be low esr, if you read the forums you have noticed people saying they opened their tv's and found the bad caps, gotten excited and ordered new ones only to be told they are not low esr....... My request is for you to make a video on data sheets so we can order the right capacitors. Love your Channel
Love your ideas and repairs very good explanation your voice sound like sonata
His accent does sound rather poetic.
In case of series-parallel combination of inductors, for applying the same formula as that of resistors, you must have to make sure that the inductors are not magnetically coupled to each other in anyways. Otherwise, formula might give unexpected results. For example, in case of two oppositely coupled(coupling coefficient=1) inductors having same inductances(say L), the net inductance in their parallel combination would be zero, instead of L/2(according to the parallel formula).
This was a fantastic instructional video. I have a couple of questions about putting together a filter board to clean up ripple from my cheap 30v 10A bench power supply but I’ll ask them over on Patreon.
Useful video 👍
Thanks for your films :). You can also check ESR using special tester, which can check transistors, diodes, mosfet etc.
12:18 Diode gone wild likes cars
superb....very informative video
Excellent investigation. I still love your singing voice. Very informative videos. Thanks.
Love this video! Learnt a lot!
Really good video as always and right on time! I've been trying to repair a psu with a fet as a switching regulator and seems the capacitors around it are not rated for the task, it makes a clicking noise and no voltage at the output. Thanks a lot!
Great job!
Excellent and very entertaining.
Great video, thanks DiodeGoneWild
I love your accent. All of Your videos are great and helpful . thanks😀( sry for bad english)
Indian english accent.. Charrrgerrr!!
@@ex-soldier4341 lol wherever . It's so freaking funny when he says bloody hell
100kHz is at the maximum operation frequency of the device. They tend to work better at about half that, need to recalculate the inductor and check that they even used an appropriate value in the first place; I've seen a few similar supplies that haven't.
Well presented lesson. I mess around with HF RF circuits. Different animal yes, but much still applies. Thanx.
He likes to articulate after finishing a sentences by slowly toning down ...Which is great
Thank you for sharing your knowledge
Could you perhaps do a separate video about your 555 timer-based DIY ESR indicator? Looks like an interesting construction.
Fantastic video!
This is fun to learn and I managed to blow at most 2 capacitors once one was in a small radio and one was in a pair of wireless headphones transmitter
I love how you took your time to "make it better" , could be a new series for you... Do you think the original manufacture failed to do so due to cost or lack of understanding of the way it worked. It doesn't seem like cost would be much of a factor to make it better
I would say that is most likely a cost-saving measure. Good electrolytics from a company like Rubicon for instance will cost around five times more than the ones that they used in there. You get a lot of things like this that I've been made based off of schematics in data sheets, but the person making them or company making them just uses the cheapest stuff they can inside. ^^;
nice job!
That's a really good macro shot where you're holding the resistor and pointing at it with a pen? The focus is really crisp!
Very nice. That ESR meter measure the impedance of the capacitor at 100KHz. I think it will be better to use 2 frequencies, 100KHz and 50Hz to measure the capacitor impedance.
We all make mistakes, the blue body multiband resistors often get confusing and hard to read because of the blue background and fading eyes.
Using gold or silver for different things than tolerance trip me up.
Thankfully there is always a multimeter near :-D.
I've used the reciprocal resistor calc with minus instead of plus, for a reversal.
Sometimes if I don't take a close look, the silver and gold looks the same. Both is just shiny the same way, especially in dim light or warm white light.
Daylight gives the best colour as its full of frequencys, unlike man made light that has parts of the spectrum missing.
Old 4-5 band resistors when run close to there limits darken, so every colour gets muddy and really hard to read.
Who decided that a blue body resistor was a good idea :-(
Awesome follow up! This format is just a superb teaching tool. Probably takes forever to make but these are my favourite style. What kind of cat do you have?
Thanks :). Yes, the videos take a lot of time to make. It's a British cat.
CatGoneWild ;) Awesome videos, thanks a lot!
Thanks again for yet another very interesting video! It’s shows that with only a few components this simple charger can go from horrible to reasonable.
Could you perhaps also give an indication of how much this would add to the production costs?
It’s a pity how lowest price competition drives the manufacturers of these products to skim on really every component where the can.
The tantalum capacitor would add a lot of cost. Those are about 10x more expensive than the electrolytic ones. I'm not sure how much does it cost in big quantities, but 1piece from a trusted supplier may cost about 1.50 USD. The big low impedance electrolytic capacitor would also add a lot of cost.
DiodeGoneWild
Thank you, that explains it.
Great vid as always. Greetings from sri lanka.
Amazing informative video.thanks man
I've used the schematic of you're DIY ESR meter to build one that allows to plug a DMM with uA scale by tuning R1 and R2 and works pretty nice. Not the best accuracy but it matches the reading of a 1uF cap on a LCR T4 meter :D .
Great material - practical and to the point :-)
you know the neighborhood mice have gone together and paid your cat to get in your way doing these videos? I am just a 67 year old fart who is trying to tech himself electronics.. your site is way over my head but there is something in the way you teach it that I can follow along and understand what you are saying and learn some very good things along the way.. thanks for all of your video shares.. carry on I look forward to your next one..
Mil gracias por compartirlo...un saludo desde Chiapas Mexico...soy fiel seguidor de su hermoso trabajo..
Great video.
super intresting video!
Verry good electronic basics video. And I realy like your accent. Greetings from eastern Germany
You are great sir....
Hello if you want to low ESR you can take two capacitors in parallel and take ceramic in parallel, cuz electrolytic doesn’t work on high frequency
At the +5 volts output the buck regulator is connected through a single 1N5819 diode. Is that all that stand against a reverse voltage being fed back into the 12v regulator from the mains side?? what would happen if somehow you were able to plug it into both mains and the 12V supply? I'm guessing the voltage would stay at 5V but the amperage would increase.
Got ya, so the outcome is dependent on the load amount and they just help each other out (in case it need be).
Use the old A/C input to plug in a 14V solar panel for your dashboard.
Beautiful cat btw :D
Really good video, thank you!
Gotta love the cat
Very good
Nice, I'd like 2 cookie noms
It will be a big loss if not to watch any one of your videos. Thank you so much for such in depth explanation about types of capacitors and their applications in different areas. Impressive!!
So what is your final charger maximum load parameters at 12V DC and 24V DC? Thanks for your video - it is very useful.
Ha! That questionable cover is right up BigClives alley! 😂
Very helpful for me thank you so much
Can i replace 2 ....5 rings resistor on the power supply primary side for 4 ring resistor near the pfc input on primary side..???
A navíc pěkná britská kočička 🙂!
How did that electrolytic cap didn't blow up if the meter charges it with AC? i thought that polarized caps would blow up
It uses a very low voltage for the measurement. This doesn't damage the capacitor. It's well below the voltage drop of diodes and other semiconductors, so you can also measure the capacitors in the board. In most cases, the measurement is not affected by the other components connected to it.
Nice job!
btw am I the only one who gets reminded of the PPAP? lol
12:24 I am watching your channel for almost 1 year. Because of your accent sometimes i doesn't understand your words(but still its good). for all these days what you are saying was 'dodgy' which i hear as dochy. 😂😂😆
Really nice!
Super explication. Merci
Great video like always! Can we hope you will do a SMPS (computer PS) modification to adjustable output some time?
greetings. very well explained. success.
Can you modify Analog Multimeter upgrade to merge with ESR Meter + LSR Meter module? 👍🏻
Bonita calculadora retro !
Privileg 825 MD from 1975 :)
That's why i have added small ceramic capacitor in parralel to a bigger electrolytic capacitor in my LC filter circuit for a MOSFET driver, apparently that makes sense. But i'm not sure if the higher ESR of cheap electolytic capacitors affects that much on lower frequencies. My circuit uses 13.33kHz PWM and without LC filter the MOSFET driver affects a lot on the microcontroller which makes the PWM signal.
So do i need to add a ceramic capacitor on frequencies as low as 10-20kHz ?
I think that you need a ceramic capacitor at any frequency, it works with a square wave (switching circuitry). In switching circuits, it's not about the frequency, it's about the things that happen during the transistor transition from on to off and back. All that ringings, overshoots, ....
@@DiodeGoneWild Oh yeah, i forgot about ringing etc.
Thank you for the answer.
03:10 . Put the cat in parallele. 🙂🙂🙂🙂🙂
thx for your help to understand these circuits ... can you help me to increase output current as the circuit heatsup very quickly when smartphones connected...i tried to convert dual transistors circuit (13003,945) smps to operate over 12v but it only gives low amp. o/p
You are a great teacher! Can you show how to connect a Power Mosfet at the output to increase current capability of the circuit? Thank you again so much for your great tutorial. Like Ted said "You are one of a kind"! RJM
How to work Sine weve inverter
Please make video
Why not measure the ESR only at the switching frequency.
Hi, do you Have a video on how to desing the transformer used for SMPS?, thanks for all your content, I Have learned a lot thanks to you
Can't you add a transistor at the output of the chip and decrease the resistance of the current sensing resistor to increase the current capability?
Great video. Never trust cheap Chinese electrolytics, i recently bought 1000uF 35V low esr "Sanyo" caps, and looking at the datasheet, these should be much larger than ones i received. They are 1000uF 35V but the esr and "Sanyo" is rubbish. As for the obsolete chip, there are cheap buck and boost regulators for cheap, but they as well come with too low capacitors that are rubbish. I was running a 12V to 5V LM2596S module at 1A and both input and output 330uF caps were too hot to touch after just a few minutes. So i totaly recommend those modules, but always switch the caps to a legit branded low esr capacitors, and also, look at the datasheet for the control chip. The LM2596S recommends 1000uF at the output for dropping to 5V and the modules come with rubbish 330uF, so no wonder they were getting hot and the chip was squealling the whole time.
Also, my local electronics store has "low esr" category but also has "High frequency" category which are more expensive but are obviously meant for high frequency switching.
I had a bunch of those LM2596 modules and they turned out to be rebaged LM2576 or similar since they were running at 52khz and not the 150khz of LM2596. No wonder I was getting so much ripple.
Forgot to mention Farads
Jo diodegonewild can you make something about diy shop tools and the dangers of that?
There is also a great video explaining just the reason why to connect multiple capacitors in parallel instead of one big capacitance capacitor: th-cam.com/video/wwANKw36Mjw/w-d-xo.html
You will always see cats and with good engineers.
That circuit picture is a masterpiece, is that a Picasso ?-)
Some one help me
My phone getting some AC current while charging. How to fix this some one told me to removing capacitor between primary and secondary on board
Try this two USB and universal plug
At the end of day it's still a shitty regulator with 65-70% efficiency. There are cheap (
Yes, this chip is definitely not the most efficient. The Darlington transistor makes it drop quite a lot of voltage. A MOSFET would drop way less and dissipate just a small fraction of the power. But if I put a different chip in it, it would no longer be a modification, it would be a completely new device :). The point of this video was just to improve it a little bit and to demonstrate some basic things.
For video’s it’s better to have a cat in series of circuit drawings than in parallel.
No, his cat is good in one piece. No need to change that!
Cat should be the battery of a circuit
@@YoDay it already is the steam engine of the channel.
@@jkobain oh yes. The unlimited charge in it is the best feature
Janus Kobain
I didn’t want to splice the cat. No way!
I meant it’s better to have the cat besides the circuit (in series) than on top of it (in parallel).
Why don't you just scratch gold paint, and just paint the silver strip on that resistor?
Ripple measurement wasn't under load, so may be misleading, also at the end the scope ripple channel had LPF turned on, cheating may be?