All You Need To Know About ESR METER To Fix Stuff. How To Use Test Capacitors Inductors Short Finder

Here we take a look at the various and curious ways we can use an ESR Meter! Learn how to test and recognise bad capacitors, test and measure unknown inductors and even trace short circuit MOSFETS using an ESR meter
CHAPTERS
00:00:00 Intro
00:00:47 What Is ESR
00:05:06 Testing Capacitors
00:10:34 How Does ESR Meter Work?
00:12:00 Bad Capacitors (type 1)
00:14:19 Bad Capacitors (type 2)
00:16:56 Measuring Inductors
00:30:39 Short Circuit Finding In VRM
00:38:04 That’s Not A Knife!
00:40:04 Conclusion
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Thank you
Richard

[@LearnElectronicsRepair]

*IMPORTANT* As a few people have rightly mentioned - I drew the imaginary resistor in the wrong place at 00:03:25 it should be in series with the capacitor not in parallel with it - this should be obvious really because ESR stands for Equivalent SERIES resistance😅 Sorry guys if that caused any confusion. What I drew, if anything, is the leakage resistance of the capacitor which I later demonstrated at 00:05:30 when I tried to use a multimeter on ohms range to test a capacitor. Hopefully this error does not distract too much from the demonstration of ESR meter usage in various situations.

[@zulumax1]

I have made mistakes in my videos which I have left in. I do put the corrections in a pinned comment just like you did. Too much editing just takes away the human element in my opinion. I just thought to think, I wonder if anyone else does this, and you did! I tip my hat to you sir!

[@jamesmdeluca]

Applisto both AC and DC. Your drawing for ESR is actually for leakage that applies to both DC & AC circuits. ESR is usually measured with 1oo kHz AC test signals. MY only ESR tester is my component tester (3-leaded). Do you know how well this function works in tat device?

[@MetalMann-de3xi]

I just wanted to let you know that you're a great teacher. You break things down to a level that people can easily understand. Unlike most experts who forget to, you bring the true 101 of a beginner course to the table. Before I watched your series of videos, it felt like I was trying to read a foreign language between other KZbinrs, documentation, and what my eyes are seeing in equipment. You taught me how to read meters, schematics, understanding classes of amplifiers beyond a single filter cap. I've always wanted to learn and understand electronics and it always intrigued me as a kid and beyond. I started getting into audio equipment and opening them up and trying to make them work by replacing stuff until it worked. Now I can pinpoint problems a lot easier than I have. I can only wish I can pick your brain for a million questions and DIY stuff. One thing that I'm having a hard time with are stabistors. I have a Pioneer SX-838 that has two broken leads at both of the stabistors. I'm having a hard time understanding how to make one, what I should make it with, and even though there's written instructions, I'm still a beginner, and pictures and videos work wonders for my understanding and learning process. I hope you can take the time to help me with this and would greatly appreciate the help.

[@mlkegates5857]

Fantastic ! I feel so stupid . I've been an electronic technician for 27 years and never thought to use an esr tester to find shorts in a vrm ! Tips like this are worth their weight in gold. I'm new to this channel so I will look back for more videos like this. A comprehensive video on using test equipment in other ways such as this would be extremely valuable. Thank you Sir.

[@LearnElectronicsRepair]

Nice to see you liked it. Thanks 🙂

[@trone32]

Same with me every day is a learning day

[@martinkuliza]

Been doing electronics since i was 6 (i'm 49) it's all a learning experience mate. Lucky for you in this day and age everyone shares their secrets on the internet. in my day (The 70s) you struggled to find an electronics club or a bloke that was also interested in it you had to buy magazines to get this information

[@vicroberts5992]

Hi Richard. I bought an atlas peake ESR meter about 15 years ago. I was given a pair of broken computer monitors. Which I fixed for about £2, and an hours work. I sold one within days, which paid for the meter. I kept the other. So I had a monitor and esr meter for nothing. Loved your video its opened my eyes in how to properly use my meter. I have several other repair projects that I am going to use my newfound knowledge to tackle.

[@KB1UIF]

I'm glad you corrected the ESR info regarding the position of the Resistance for ESR, you drew EPR Equivalent Parallel Resistance which is another important characteristic. EPR can also be measured and its how you can detect leakage in capacitors, as I'm sure you know Rich, but your viewers might not. Maybe a video on EPR another time.

[@jseco4544]

Enjoying your videos At 3:25 the resistor should be in series with the cap to properly show ESR. With the resistor in parallel we would be showing "leakage" current.

[@LearnElectronicsRepair]

Yeah OK fair enough I'll hold my hands up to that one. I've added a pinned comment explaining this so everyone can see it 😁

[@ashleyjwilliamshand]

Learning about electronic principles directly tied to the medium your interested in really makes a difference. Thank you!! Perfect video layout, speed of teaching, and repetition. Simply fantastic. Motivated and inspired!

[@davidv1289]

Great video! Thank you for explaining ESR and showing us a unique use for an ESR meter. Testing capacitors completely can be difficult. For example I am currently refurbishing a piece of 1980's vintage test gear that has a 4000 uF, 30 Vdc, +75/-10% electrolytic in the power supply. It measures 4630 uF and has an ESR of 0 ohms at 120 Hz - great! The problem is that it has a leakage current of 317 uA at 30 Vdc. So, as you pointed out, capacitor value and ESR aren't the whole story - especially for larger aluminum electrolytics. Regards, David

[@mike-yp1uk]

These tools are much cheaper than I thought. I bought both while watching this video. Thanks for all your help. This stuff is awesome 👍

[@trone32]

I remember just after you started this channel you told me to buy an ESR meter in a reply to a comment I made. It was a very useful suggestion and now I can use it for testing even more components

[@Steelplayer59]

I realize this video has been up for over a year, but my need to troubleshoot capacitors in a switched mode power supply beyond the obvious largest ones brought me here. I purchased the same ESR meter, and am pleasantly surprised to find that it has the dual purpose of measuring inductors. I’ve worked with electronics for half a century, and didn’t even know about the potential of in-circuit testing with this type of meter. I just assumed it to be an esoteric test instrument for very special testing. Boy, was I wrong! Thanks for your excellent presentation and explanations. Well done!

[@MikeSims70]

I just love your videos ... you're very thorough when you explain things and you make the subject understandable. Thank you for another excellent video!

[@johnshere4922]

I got up late this morning but I've learned a lot, and going to the workshop to confirm what my ESR meter will do in practice. Thanks JS

[@Drmikekuna]

I'm not an electronics guy, but I have always found electronics fascinating. I also have a wish to fix consumer electronics instead of throwing them in the bin. Unfortunately, I don't have a working knowledge of basic repair techniques. However, your videos are helping me out immensely. You are a very clear and excellent teacher. Thank you!

[@peterlethbridge7859]

Brilliant. As usual, superb explanation without getting bogged down in the math. Most content producers in this field seem to want to show off with their math prowess. Rich, just lets you know whats important. There isn't anyone that is producing content this good.

[@georgerodriguez277]

One of the few people who explains so well with diagrams and calculations Just great job on ESR capability thanks so much

[@googleedwardbernays6455]

These videos finally help me “pierce the veil” in my path to basic electronics hobbying. I started upgrading pots , caps and wiring on my basses and guitars. Then i hit a ceiling where everything else i was finna learn was seemingly impossible. But thanks to this Billy Bragg sounding bloke, i know fundamentals .

[@paulc9139]

I have one of these it saves me loads of time in the workshop, take yesterday I did all my jobs by 12:00pm finished for the weekend YES👌👌😊😊🤣🤣., oh and I built one of your H ,Clone Trackers, I rattle through stereo amps, finding the faults, brilliant piece of kit, thank you Richard.

[@LearnElectronicsRepair]

And here is me publishing videos on a Saturday morning to keep you entertained on a weekend LOL 😋

[@paulc9139]

@@LearnElectronicsRepair And you do, after 45 years in this game I'm still learning, & I love it as much as I did as an apprentice, when the Electronics bug bites you it can be for life.

[@it-sd]

Thank you for showing the voltage regulator circuit schematic/diagram near the end. Your explanation made perfect sense. Well done!

[@LearnElectronicsRepair]

Thanks for your kind words, it's nice to see you like it 🙂

[@TYGAMatt]

I have one of those ESR meters and was using it today to find a bunch of bad caps. Work great. But didn't know about the inductor use. That's brilliant. Thanks for the top tip.

[@youtuuba]

Good video, in spite of the error in regard to where the effective SERIES resistance goes relative to the ideal capacitance. One things I noted was that DCR (DC Resistance) was not mentioned (in case I missed it?). This is a very important characteristic of capacitors, and on electrolytics shows breakdowns of the capacitor's internal structure, up to the point of a total failure what would appear as a shorted capacitor. Many ESR testers/meters do NOT measure DCR, but many DO. As was mentioned in this video, a capacitor that is clearly bad (from physical inspection, or noting that the measured capacitance is way off) can still look OK in an ESR test/measurement, but will fail a DCR test. So it is useful for buy an ESR meter that can do both. A common testing strategy is to test DCR first, then only if THAT test is OK, then proceed to test ESR. Some ESR meters automate this dual test, or can be selected to a mode where ONLY ESR is tested. Also, an ESR meter can be used to test low value resistors (below 30 or 25 Ohms), often with better accuracy that inexpensive multimeters can manage, BUT it is best to use the DCR mode for such tests, because in ESR mode the result will be skewed by the inherent parasitic inductance or capacitance of the resistor. I had looked at buying this same ESR meter shown in the video, but could not determine from the given specifications of it was able to test DCR, so I bought a different one, about $40, from EZM, their ESR-2501C, which does both. There is another product, sold under many brand names, which instead of an LCD display instead uses an LED bar graph to show the resistance value. This also tests ESR and DCR, and is one of the models that can automate the two tests, DCR then ESR. The downside to those is that they are much more expensive, and can only be used with the included tweezers test clip, which rules out testing physically larger capacitors or axial lead ones (and they won't tolerate adding extension leads/clips).

[@B9NE]

You are a great teacher. I wish I had you in high school

[@rrho6701]

The switching power supply trick to find shorted MOSFETS is very clever. I haven't seen that one in my 45 years as an EE. And I thought I knew all the tricks ;). Good on ya!

[@gordthor5351]

Thanks again Richard. I learn something new every time I watch your videos. I always assumed that if the ESR is very low that the capacitor should be good. As you demonstrated that isn't always the case. I have same ESR meter and it's still working fine after about 8 years. I also have the Blue ESR meter which gives instant consistent readings and the polarity doesn't matter, but costs about 3 time more.

[@LearnElectronicsRepair]

To be honest I don't believe the polarity matters on the MESR-100 either, as it injects a low voltage 100KHz AC signal. I just tend to comply with the coloured leads (red = positive) more out of convention and familiarity than anything else 😉

[@electronJarvs]

Neat little trick using it to find the short. Will be remembering that for when i eventually get round to buying an ESR meter

[@rcary]

I bought a fairly inexpensive esr off amazon for troubleshooting my Tascam 122 mkii tape deck. I spent hours trying to find an intermittent fault with the counter display on the deck. It kept glitching the display every once in a while and it was really annoying. I checked almost every component in the deck, swapping out this and that but couldnt pin it down. I bought the esr and started pulling caps on the power supply, testing and replacing as i went. Eventually i came across 2 caps on the board that showed on the esr that they were way out of spec. I swapped those 2 caps out and just like that the problem was fixed. :) Very handy bit of kit.

[@gloubiboulgazeblob]

Very instructive video. Thank you very much !

[@kryzoxy1]

I am self learning electronics and i am doing a lot of maths studying one book. And you are explaining way better many concepts that the book doesn't do clearly. Continue with your work it is very good.

[@runteam6355]

Thanks again Richard.

[@jameslineham9761]

Like always another great video. Thanks for the learning experience

[@arthurfricchione8119]

Thanks for sharing. Very informative video. Going to purchase 0ne right now. 😊

[@garrypowell1086]

Love your work. You are a great teacher. I only wonder how you find the time to make such technical videos. I'm an Australian viewer.

[@martinkuliza]

Mate... he fucking starts the day with a VB Longneck and a Vegemite Sanga gives him all the vitamins and minerals he needs to sustain the you tube channel :P

[@felipehernandezhernandez5533]

Muy buenos tus videos con informacion de excelencia ricardo , espero que pronto pongas subtitulos en español para comprender mucho mejor todo lo que explicas para aprender mas gracias por compartir tus conocimientos saludos desde MEXICO

[@cskeet1320]

Hi Richard, Great video as usual. I have the MESR-100 ESR meter as well. I found it wouldn't zero properly and started reading 3-4 ohms instead of OL when the leads weren't shorted. I got an Atlas ESR meter to replace it and although it's a bit more expensive, it's in a different league. It measures capacitance and ESR at the same time. It doesn't need to be zeroed. It doesn't matter which way round you connect it and it automatically discharges the capacitor before testing it, if you forget, letting you know it's doing this as well. It seems more accurate too, and it's made in Yorkshire, UK! On that point of discharging the capacitors for you. I know it's best practice, but we can all forget to do this sometimes. After I got the Atlas ESR 70 meter, I decided to see if I could repair the MESR-100 before throwing it away. It's turns out that accidentally using this meter on large undischarged capacitors fries input schottkey diodes D1 and D2 on the PCB. I replaced them and it works fine now. They are SS14 surface mount diodes (marked S4) and clearly marked at the bottom of the PCB. I hope this helps anyone who has fried their MESR -100. Like I say though the Atlas machine has a lot of advantages.

[@LearnElectronicsRepair]

I'm not sure how you fried the ESR meter - I had mine for about 8 years, I use it a lot and as you see in the video it is still working well and zeroes just fine. I have a Peak Atlas DCA55 semiconductor tester from about the same time - that is also working very well and I use it quite a lot in repair work, I wouldn't use anything else to test semiconductors. Regards the Atlas ESR meter that measures ESR and capacitance at the same time - what does it display if you use it to measure unmarked inductors or find short circuit mosfets as I demonstrated here?

[@cskeet1320]

@@LearnElectronicsRepair Hi, Good point. The Atlas says "in circuit/ short" if there is a short. I couldn't get to any inductors easily, so I made a couple with some wire coiled round a dowel. 14 turn: MESR0.936/ Atla 0.25 7 turn: MESR 0.553/ Atlas 0.18 (ohms). And just for fun, with a 6 ohm speaker: MESR was 15.5 ohm Atlas was 9.9 ohm. I think the Atlas uses various frequencies between 50 and 100kHz. Perhaps that explains the difference in readings. I'll get some inductors and see which one is more accurate as measuring Micro Henrys. I don't think I've got any Mosfets, except a few working ones in amps. I'll let you know when I get a bad one on a suitable board and try them both out. I wonder if the original diodes in my MESR machine were a bit flakey?

[@LearnElectronicsRepair]

@@cskeet1320 The facts we know then: on the MESR the reading in ohms is reasonably accurate with known inductors - proven using the reactance formula and tested from 0.6uH to 100uH - so those readings are the 'correct/expected' ones at 100KHz. The Atlas reading must either be using a different frequency (easily proven with a scope) or is not actually displaying the resistance (reactance)

[@cskeet1320]

@@LearnElectronicsRepair I checked both meters on the scope. MESR clearly shows a 100kHz frequency, but there is nothing meaningful from the Atlas. It seem to very quickly switch through several frequencies. (not very good for your inductors hack) Anyway I have both now. Atlas for stress free capacitor testing and the MESR-100 for short finding/ inductance measuring. Cheers.

[@LearnElectronicsRepair]

@@cskeet1320 Thanks for the info, it seems like both are very useful tools in their own rights, and both have their advantages and disadvantages for different reasons 🙂 This is really useful info, it helps people to decide what they want from their test equipment. Thank your for your time and effort (despite the slight typo in your comment 😉).

[@frankreiserm.s.8039]

Great video. I am sorry that you did not mention the chart on the ESR meter. I had no idea that it could measure inductors. I was always screwed by not knowing inductor values, but now you taught me how to find them with the ESR meter. Thanks! I am sorry that you did not include that, when you turn the ESR meter off, it says "Thanks for using. Bye"

[@ubertcoolie8694]

Thanks for another great video.

[@stevenmoffitt1643]

Thanx for the instructional video

[@Earthstein]

Richard is a great teacher.

[@fritzj6803]

Wow! I had no idea I can test inductors with my esr meter. I almost ended purchasing an LCR meter.

[@dumbluck6180]

Very helpful!

[@orange11squares]

very educative, well done, thanks. i only have an analogy ESR meter self-constructed but i might finally buy a digital one, much more precise.

[@Broxie]

Great video Richard. I have a Blue ESR tester designed by Bob Parker. I do not get the same readings out of it as you get on your ESR.. I thought it was an okay bit of kit as seemed to be reviewed well when I bought it. Since then I also purchased a DER EE DE-5000 LCR Meter. The ESR on that does not equate to the Bob Parker readings, but it can do a 100kHz test. I should have watched this video before buying the Blue meter Eh! HA HA... Live and Learn Electronics.

[@chrispomphrett4283]

A lot of the multiple component testers, provide an ESR figure along with other capacitor etc data on their screens. My mate was talking about getting a dedicated meter when i pointed out he already had one!

[@endurofly]

Hi Appreciate your effort to educate people. Very "user friendly". You can also use meter array socket (4 holes neg and 4 pos) for elements that are not in circuit. Perhaps you should also consider another versatile quite cheap ESR meter: BSIDE ESR 02Pro

[@paolomarsigliesi9479]

brilliant. i just bought now your mesr100. looking forward it to arrive and play with it.

[@keithking1985]

I need to get an ESR METER myself 😊 I like that one you have there. I going to order one tonight. I'll try and get that same one. 👍🇮🇪🙏

[@james2hackett870]

Great vid,with the esr

[@GeneralFixing]

You are the best Sir

[@WN8HGZ]

quite good thanks

[@ThomasKroghHansen]

Thank you very much👍

[@kenjunge2768]

Thanks!

[@izzzzzz6]

I had no idea i could do that with my esr meter. Nice

[@fouazhdib6813]

good work

[@grahamluscombememories9897]

Fantastic

[@paulhyland4653]

Love the video thanks your are a star

[@geoffw.5003]

Hello Richard Did I have too many beers last night or did you draw this ESR resistor totally in the wrong place ? It should be shown in series with the ideal capacitor not in parallel as you drew it in your diagram. You correctly said that the ESR value should be low, but in your diagram a perfect ESR value of 0 would then short out the ideal capacitor. I.E it aint a capacitor no more ! This was very confusing

[@LearnElectronicsRepair]

@Geoff W Yeah I did draw the resistor in slightly the wrong place, probably that is why it is called equivalent SERIES resistance 😉 Hopefully it didn't distract too much from the demonstration of the ESR meter and how to use it in various situations

[@jemglen]

A joy to watch, thank you. Could we have an introduction to CRT fault-finding and repair?

[@LearnElectronicsRepair]

I was taught to do that in the 80s I'm actually qualified as a TV repair engineer. Is there any real demand for this sort of repair video? I don't mind making them if there is

[@jemglen]

@@LearnElectronicsRepair Thanks for your response. I would say there's definitely a demand - many of us retro enthusiasts are trying to maintain (or repair) old monitors but fear poking around inside with the potential for disastrous voltages! Some instruction would be fantastic!

[@el_sturlo]

@@LearnElectronicsRepair I'm interested too, an all you need to know about CRTs would be great!

[@sjogosPT]

@@LearnElectronicsRepair Iam interested too. Iam reparing a Philips TV right now because its a very 80s feeling TV Set i like it much. I already saw your video about the portable TV, i would like to see more :). Thank you!

[@Minipolice]

Thanks for the tip, I bought one. Now I know how to use it.

[@LearnElectronicsRepair]

Enjoy!!

[@saarike]

Great! 👍👍

[@frankgeeraerts6243]

Two tumbs up with a SMILE !

[@weerobot]

They Awesome..

[@iammememine]

Hi Mr Richard, thanks for the video! Love it so much. I am new to electronics, i had this meter and quite surprised that i can use it for check inductance. Anyway would love to know a bit about impedance since i am now focus on repairing audio instrument. And impedance is used for speakers. Hope you can make a video about it very soon. Thanks!

[@ruimvp]

thank you, another useful video. when we know that we can trust the ESR result when testing in circuit? I am thinking about the circuit paths and other components connected in the same circuit, but in the ESR manual says that the tests can be done in circuit.

[@Dutch_off_grid_homesteading]

Heya I now understand thank you very much

[@jedishaw6771]

Very informative video, does the ESR meter only do caps of 25v and under?

[@ES-iv6wb]

Hello Incredible channel. Liked and subscribed. I had one question, you mentioned the ESR meter is only used on electrolytic caps. Is it also possible to use it on ceramic caps? SMD caps?

[@it-sd]

For anyone in the market for an LCR meter…I own a DER EE DE-5000 LCR Meter and I love it. It paid for itself in just 1 repair. 20,000 Count main display to measure L, C, and R; also measures ESR, θ Angle, dissipation, and quality factor on a smaller second display.

[@LearnElectronicsRepair]

@Cory Marqusee That seems quite difficult to purchase. Can you tell me where to get one and I will happily review it and compare it to the MESR-100

[@yanfishtwig2356]

@@LearnElectronicsRepair Hi Richard they are on ebay most from japan about 130euros but i dont know about shipping mine came to the uk in 10 days . i do recommend getting the tweezers and croc clips with it i did not and regreted it

[@xwarp]

I have the DER DE-5000 meter also. I wouldn't recommend anything else considering the price point and features in comparison to other ESR meters such as the atlas and MESR. I'm not sure of availability for the DER for people outside the U.S., but I'd say it would be worth the extra hassle to get one over the two I previously mentioned.

[@keithking1985]

I just spotted a video you made Richard where the heading is "build your own DIY ESR tester for £1" must check it out. 😊

[@riteshpahladsingh3819]

Hi sir, your video is very educational.Many thanks for uploading. But at the same time, I have a question, I now have a multimeter with capacitor test option(Aneng 9002), I am not yet a professional electronics technician, do I really need this esr meter?

[@phillippatterson512]

I gotta git me 1 a Deez! Great video. Very informative and enlightening.

[@melvynmatthews410]

Hi Michael,,excellent stuff,,now you have a sparkling fluke can you clean your bench😆⚡️💥🍦

[@ccfoam]

Thank you Richard for what you do! Question: If a cap used in an audio device checks fine using capacitance meter but has a bad ESR reading, does it matter? The audio device only see's 20k Hz and the ESR meter uses 100k Hz. Can you please explain this situation?

[@RetroTinkerer]

Hello, great video as always! I'm looking to get an ESR Meter and I keep bumping into the Peak ESR 70 have you ever heard of it or try it, do you think this unit that can both measure capacitance and ESR are good enough for a hobbyist like myself that want to repair their motherboards and cards?

[@jackmarlon3660]

Buen Tutorial! Una Consulta. Los Capacitores Electrolíticos De 400Voltios, 450Voltios A Más También Es Recomendable Medir Con El MESR-100 ? Muchísimas Gracias Por Su Orientación 🤗🌾🕊️🍀👍❗

[@shooter3267]

Will the esr meter work on smd ceramic capacitors? Thanks for the video, very informative!

[@LearnElectronicsRepair]

Yes is will measure that but to be quite honest from a repair point of view ESR is a problem with electrolytic capacitors 😉 When MLCC capacitors fail they usually go short and sometimes go leaky (read several hundred ohms using multi meter ohm range)

[@AlienRelics]

You drew a resistor in parallel... Equivalent SERIES Resistance.

[@HKYT649]

thx

[@falopio2007]

What you define in your scheme is the parallel capacitor resistance. What this instrument measure is the equivalent serial resistance ESR, that means a serial resistance internal with an ideal capacitor.

[@skeggjoldgunnr3167]

It might should be called Series impedance @ 100kHz. For *this* tester. I've always wondered why this sort of tool doesn't have you first plug in values or info you know about the DUT. Then frequency sweep it to verify that it's tuned resonance is within the range that it should be. THEN give ERS reading in ohms of impedance, right? THEN call the capacitor "good" or "bad". Like. ONLY then. It should auto-short leads.

[@jediknight2350]

fantastic im learning a lot , is there a way to take a modified sine wave cheap inverter and make it pure sine wave ????

[@LearnElectronicsRepair]

To be honest I am not an analogue circuit designer so I don't know how to do it, but as your question is 'is there any way to...' then i am sure the answer must be YES 😁

[@steves-gaming-uk8977]

Loving the content almost watched all your videos working through them. I've recently had to retire early due to disability and gone back to my childhood hobby of electronics so picking it all back up again . Can anybody help I've a Dan radio power board which I diagnosed that it has two faulty voltage regulators also a damaged cap I have changed them all and tries it again and the regulators have both blown again I've tested the circuit again from power in which is 9v DC and the only thing I can find is two resistor are reading low to what they should be . Any help I know you can't see the board but any advise would be great.

[@stevekim3922]

Hello! Richard, If you don' mind, next time would you post about " Most Latest Standard of Power Sequening Timing diagram Full Map Chart for DT, LT, Macbook, and GPU" . It would be a nice to undersatnd. Thank you, Sir. Have a nice day.

[@chickennugget3362]

I use the peak esr meter, its great

[@BrianSmith-ow9gy]

Rich, when you test a capacitor you first use a capacitance tester and then the MESR device. Is there a single unit I could buy that does both? If there is it will both save cost and time (as I'd only need to do one single test)?

[@ronniepirtlejr2606]

I would like to know about different types of electrolytic capacitors. They may have the same capacitance & voltage & they may even look the same but, they have different markings on them. Some are for audio, some are for switching power supplies. Ect. I know some have low ESR but, I think there's more to it than just that? Could you make a video explaining the difference types or have you made a video?

[@engjds]

For those new to the game, if you switch a voltage, that rising edge can be thought of as being composed as an infinite number of frequencies for a very short amount of time, so if you connect an inductor or capacitor to the switch, the inductive reactance will be high and for a capacitor, low reactance. This is why in communications, you want to decrease the number of transitions in a digital system, because each pulse is increasing the bandwidth and so it may not meet regulations on noise interference.

[@xxvsasixx]

Thanks for all video ,i buy the ohommetrer have 6 buttery ,i can replace the 6 ×1.5 v with 9 v one buttery? .

[@LearnElectronicsRepair]

I don't see why not

[@James_Bowie]

Great demo, 👍 but please note: there is no 'a' in megohm, nor in kilohm. Two syllables, not three.

[@baghdadiabdellatif1581]

Thank you. ESR with 22khz is good?

[@pfromeurope]

another reason for low esr: the higher the more heat gets generated. the more heat, the faster the electrolytic filling is drying. the faster it's drying the sooner the cap is dying. and be sure to consider the purpose for the cap when choosing the esr test frequency. because esr varies with frequency, we use electrolytic caps in psu filters and foil caps in signal filters. with only one frequency you can only check for one purpose.

[@pault6533]

Awesome. So what if I already have a LCR meter. Will it also work as well with diagnostics or do I really need the dedicated ESR meter?😊

[@martinstockbridge3449]

I've just brought one thanks to you. Do you ever use the micro USB to power it up?

[@martinstockbridge3449]

Also do you use manual or automatic setting?

[@Caswagna93]

Can you use a meter like this to test caps without removing them from a circuit board? I’ve got a CRT TV that could use the capacitors checked and I’d prefer to not remove to test

[@mtrltoolman]

Are there any way to make the components tester to measure the esr accurate?

[@LearnElectronicsRepair]

Well, if we look at the way I was measuring inductors using the resistance reading on the MESR-100 meter and the reactance formula, I would say it is fairly accurate 😉 Also I wonder where you would need to know accurately what the ESR is, rather than just wanting to know if a capacitor is good or not.

[@marcellipovsky8222]

This is not a knife... you almost killed me with this reference Richard🤣🤣🤣🤣🤣🤣🤣🤣🤣

[@LearnElectronicsRepair]

hahaha Yeah I think I made a bit of a reputation for my dry sense of humour LOL

[@marcellipovsky8222]

@@LearnElectronicsRepair I love that kind of British humor! Talkin Jimmy Carr, Ha-haaa

[@misseryguts]

Hello, very interesting video, I have the same ESR meter. I am trying to repair some power supplies and have run into an issue. A cap required is a 1 uF 400v electrolytic. My charts say the ESR should not exceed 8 ohms. I have tried buying new but even low ESR caps are measuring new between 16 & 22 ohms. Are all these faulty or am I missing something?

[@jeffreystroman2811]

I have that exact same esr meter and just the other day I was thinking, of all my working test equipment I have nothing to measure inductance with. We if I had finished watching this video (yeah) 6 months ago when I started to watch it I'd have known better (yeah?)

[@Str8Reckless63]

34:34 can someone help me understand the 12v to ground? I feel like I keep confusing myself with understanding to ground.

[@Chief_Engineer]

Instead of dividing by .628, you could multiply by 1.6. And if you multiply by 1.5, which means just adding 50% to the measured value, you can do thus without a calculator and are close enough for most practical purposes. Unless you want to build a precision oscillator, of course😊 This is how I convert the mph speedometer on my classic car to km/h. Though I keep telling people that I divide the reading by .65, which typically confuses them. And makes them admire my mental calculation skills 😂

[@garypoplin4599]

11:24 - It was surprising to me that your meter reads open here considering the input capacitance of your scope. Am I missing something? 19:51 - shouldn’t the term be EPR (Equivalent Parallel Resistance since the resistance is thought to be in parallel with the capacitor as you showed earlier?)