eXtReMe iSoLaTiOn ( Low Leakage Power in Precision Electronics )

[@pesterenan]

"Light emiting resistor" My god that made me laugh out loud HAHAHHA

[@_adamalfath]

Every electronic component act as a heater and emits light if you operate it wrong enough

[@CyclingSteve]

That and the diagrammatic goatse.

[@GeorgeTsiros]

one of the oldest jokes, but always appreciated 😀

[@gataness]

Caught me off guard Hahaha

[@lpjunction]

Diode = voltage dependent resistor sort of

[@robertstrops2346]

"...as a DC person, I hardly know what a dB is..." this was gold! :D

[@GodmanchesterGoblin]

As a digital person, I tend to have the same viewpoint.

[@bertholtappels1081]

This is ridiculously good. High grade technical content, but even the puns would make it worth it 😁

[@Spookieham]

I never really noticed them before but after watching a few videos they are riddled with them and really makes them enjoyable.

[@IanScottJohnston]

I bought a medical grade isolation transformer from Ebay a few years ago........contacted the manufacturer for specs.......they replied "where did you get it from?"........oops!

[@TheBarretNL]

would love to hear the rest of the story actually hahaha

[@IanScottJohnston]

Well, they didn't give me the specs, but it's still in my workshop getting used quite a bit. Manufacturer is called MediWatch UK, bought over by Laborie.

[@PowerScissor]

Say you inherited it from a family member who passed in a horrific tragedy. You found a note from the deceased saying their dying wish was for you to acquire the specs of the device to complete their life's work.

[@IanScottJohnston]

When you mean horrific tragedy........I'm assuming you don't mean electrocuted by said isolation transformer.....LOL!

[@TheBarretNL]

@@IanScottJohnston pfffhahahaahaha XD

[@mreese8764]

Your German accent becomes more and more sophisticated. 😊👌

[@Kawka1122]

Less trustworthy

[@DevilsVideos1]

Woah, I am currently developing an isolated high-impedance ADC module array designed to measure high-impedance voltage sources (~100k of internal resistance) with 5 digit resolution and 2.5V dynamic range. I've learned about FR4 leakage, guard traces, solder mask leakage, chopper amps etc already, and now you've covered probably the most subtle topic - isolation transformer leakage and how to reduce it. This was of a great help, thank you!

[@GAK1atatt]

You may want to use batteries and a Teflon board. Although 100k isn’t all that high an impedance. Condenser mic capsules and boards work in the gigohm territory.

[@theshannonlimit1114]

Look up "austin ring transformer". These are used to feed single phase AC power to the signal lamps on AM broadcast towers, while not passing the RF to the power grid. They are dual, interlocked toroids, with one AC winding on each one.

[@dollarbill8976]

I would like to see that. Makes since.

[@mased-v2j]

You are absolutely one of my favorite and most talented content creators. Your videos sit well among the ranks of CuriousMarc, Applied Science, and Stuff Made Here. Great video, as always. I'm excited to watch your following grow.

[@nickstanley5064]

Praise the ppm Gods, my favorite voltnut has returned with a new video.

[@craigs5212]

At my first company back in the early 70's they produced the Vidar 510 DVM. It had a special power transformer. The mains primary was on the outside of the EMI chassis and the secondary on the inside. The transformer was fully encased in a die case shield, such that only the magnetic field could be conducted to the inner chassis. IIRC it was developed for an Aluminum smelter to monitor current shunt voltages with huge multi thousand amp of common mode currents all over the place with shunts located a long distances away.

[@samheasmanwhite]

Huh, that sounds demanding. Did the core of the transformer actually pass through the shield? Was there anything to prevent the shield from acting like another winding on the transformer (slits, gaps, etc...)?

[@philipoakley5498]

Installed some equipment at a UK smelter many years ago. 195kA dc, single turn 'load' (down one smelting hall, back up the other hall). I could hang screwdrivers by their tips from the structural steels. Wallets (credit card mag stripes) had to be left on vehicle floor pan to stop them demagnetising. Some wild stuff. And no aluminium drinks cans allowed (H&S)!

[@grahameida7163]

In the past I was designing mains filters for rf test chambers. One limiting factor is the Barkhausen effect (magnetic core switching delay). There was a Russian paper we looked into that used mechanical filters (effectively a band pass filter) very interesting results.

[@TDLinux]

It looks like a couple of the switch mode converters you tested have Y-capacitors across the isolation barrier. These can sometimes cause currents large enough to feel. It seems like their contribution might outweigh the transformer inter winding capacitance, but it would be interesting to do the measurement with them snipped out to see.

[@CATA20034]

Same thing I wanted to point out.

[@power-max]

I have lit up LEDs and even neons from such things! And felt it too haha

[@hamjudo]

Cutting out the Y capacitors will remove the return path for high frequency electromagnetic interference (EMI). Which means taking them out may cause other types of interference with the sensitive measurements. There are other ways to design power supplies to achieve low EMI. It is much simpler to avoid the designs that require the Y capacitor.

[@friedmule5403]

Sorry to disturb you, but I am desperate. :-) I think about everything he is doing in this video, has taken a space rocket over my head. May I ask what he is measuring and what it influences?

[@power-max]

@@friedmule5403 common mode rejection. The voltage on output of the charger relative to earth ground. Due to capacitive coupling, there will be a small current that can flow, and a voltage of up to nearly 100V that can develop. It can cause problems with precise measurements and audible noise in audio circuits.

[@velox__]

Wake up babe, new Marco Reps vid just dropped

[@FesZElectronics]

Great job! I guess you could increase isolation while not compromising efficiency by building a resonant converter. It should reduce the uncoupled inductance and thus deliver more power.

[@da72762]

Delighted to see one of my favorite KZbinrs in the comments of my newest addictive channel. Marco reminds me of a combination of FesZ and GreatScott. Love both of your work

[@tomking6006]

What about peltier devices? Deliciously solid state and only a teeny bit horribly inefficient.

[@poptartmcjelly7054]

and the excess heat can be used to heat the oven for the reference, neat!

[@KnowledgePerformance7]

Or l a s e r s

[@bob2859]

A RTG usually is a peltier device. Apparently thermals are the reason for not using a super-radioactive and probably illegal discarded RTG, and no other reason... :)

[@blueredbrick]

@@KnowledgePerformance7 It should lasers yes. Pref. RGB ones.

[@kreynolds1123]

If not being solid state is not a deal breaker, one could simply mechanically couple a motor to a generator for virtually absolute isolation.

[@nex8686]

Love it! Your sens of «electronics humor» is the best🙂🙌

[@davidgustafik7968]

Interestingly enough motor-generator pairs are actually used in very high voltage applications such as particle accelerators where you have to get a few hundred watts, or a few kW of power into an area (deck) that has a voltage of say 100kV relative to ground. It's a very fascinating.

[@power-max]

Apparently back in the day the military used these to do frequency conversions as well, usually between 400Hz and 60Hz. Since maybe the 70's solid state electronics got good enough to replace those.

[@PeregrineBF]

They used to be used in a lot of machine tools (lathes/mills/grinders/etc) to allow for more optimal spindle speeds via frequency conversion.

[@samheasmanwhite]

Can't beat a meter of insulating shaft for isolation.

[@AuxiliaryPanther]

@@power-max if by "back in the day" you mean "today", you are correct.

[@power-max]

@@AuxiliaryPanther I work for the US army and we do not use motor generator pairs for frequency conversion. There are a number of different MIL COTS converters we use. They all use solid state switch mode converters and inverter stages. AFAIK they work by rectifying the 115VAC 400Hz to DC, with power factor correction, then feeding an inverter stage to convert that back into AC, which is filtered with some output LC circuits. Usually these are fed with 12, 10, or 8 AWG MS22759/43 or /87 cables (200°C and 260°C, respectively.)

[@johnanderson5208]

Good video, but Marco, you missed explaining the most important instruction on 732a: You never take measurements from 732a while it's plugged in, that is the whole point of the 732a having a 24V sealed lead acid battery pack built in. The main point in the 732 manual: Never take measurements while the 732a running from Mains power. The Mains power is only kept on to keep the 732a warm and charged between measures. Typically you're not going to be using that device for long term tests, a 732 is mainly used to transfer a known calibrated Volt from your local cal lab to your other in-house 732's, and from there you can periodically align your 3458a's to the 732a's. We've found that a battery / supercap cycled power system gives best low noise results, by far. There is a reason a lot of those systems are patented.

[@samheasmanwhite]

I think he was purposefully leaving it plugged in since batteries are perfect isolation and he just wanted to compare the transformer isolation.

[@tolkienfan1972]

That's very interesting. Makes sense

[@Kawka1122]

What if there is some added noise from noisy acid in battery?

[@jakobhalskov]

Whoa this is so good and inspiring - not everybody can make a long list of transformers exciting!

[@philippthill6501]

As I have a totally different background, I understand maybe 10% of your videos, but somehow I really like them haha. Also great puns ^^

[@BrotherLuke2008]

I love the transformer headed transformer animation slice. Very funny. Fantastic content as always. Thanks 👍

[@stevesedio1656]

The Topaz ultra-isolation transformer is old tech, I worked there in the 70's. The primary and secondary are wrapped with copper, insulated with tape to avoid a shorted turn. The one we did had aluminum cases around both winding (not just the plate you showed), the copper and aluminum were grounded. Any noise on the primary saw: Capacitance to the primary copper shield Inductance of the shield to ground Capacitance from copper shield to aluminum shield Inductance of the aluminum to ground Aluminum shield to the secondary copper Inductance of the copper shield to ground. Isolation was very good, as long as all the shields were grounded properly (primary and aluminum to earth, secondary to the chassis ground of the powered product. They did side by side, and inner and outer when leakage inductance was critical.

[@GodmanchesterGoblin]

Interesting, thanks. I have a 500VA (probably 1980s) Topaz unit that I occasional use (mostly for the safety benefits if I am working on powered equipment where the mains wiring may be exposed. But it's good to have further understanding.

[@DBravo29er]

I've got several .0005pf Topaz Ultra Isolators. Step one on all of them was to verifying correct tap wiring and step two was to tighten EVERY connection point (including torquing the case through-bolts). All have brought obvious improvements in sound quality in each respective system. I size them for being *at least* 3x the max current of all devices connected. I have had better luck with these than my old PS Audio P15 power plant.

[@geemcd]

Always enjoy watching your deep knowledge and dad jokes. Sometimes i know what you are talking about, other times i just hope i will absorb something through osmosis x

[@stucorbishley]

I’m an electronics hobbyist at best, and I only have a concrete understanding of let’s say 20-35% of your topics and observations. But I love each and every video, your approach is fascinating and it fuels context for so many ideas or projects (ahem, problems) I have. ❤️

[@Dinkleberg96]

2:55 on the top scope LMAO this guy is such a troll. Love it 🤣

[@Graham_Wideman]

Hahaha nice catch!

[@diyemc7206]

Welcome to that rabbit hole called emc :) Common-Mode problems are 99% of that work. To be honest, it's mostly solved by altering dimmensions after failing to "just" add filters. Having that said, have a look at ethernet magnetics and gate transformers and those old ISDN/POTS transformers.... at least the latter 2 should give you 1W+ The higher switching clocks needed may sound counter intuitive, but remember the impedance of an CM choke :) so there's a geometric sweet spot in the hunt for the lowest CM noise... BTW, I have a propper EMC measurement setup... so if you feel your converters should get some characterization, I may be able to get you numbers :) Regards

[@twoheadedpanthr]

I am constantly baffled as to why I'm subscribed here lol. I watch most of the videos and often come out understanding less than I went in. This stuff just goes way over my head lol. Keep it up man with magic words.

[@lucadoge]

Everytime you upload my life gets better :D

[@davelister796]

Incredibly cool. Thanks for sharing a few bits of forbidden arcane knowledge with us.

[@franzliszt3195]

This is my first vid I have seen by this guy. Quite amazing -- most went over my head and I'm going to have to rewatch this a few times. Wow wow wow!

[@franzliszt3195]

i just don't know why youtube has not recommended before. Such a good channel, but seems to be well hidden in the deep caves of youtube.

[@marijntopgear]

I love your content! Thank you for all your hard work making these awesome, technical, funny videos!

[@andutei]

Magnetec has nanoperm cores with huge relative permeability, 80000. I've used them. Also, look up Austin transformer. It's used to power lights in transmission towers. It's a toroidal transformer with one of the windings at a large clearance from the core.

[@frollard]

9:00 that qi reciever may be pulsing because it's not detecting a load on the output. Once it has no draw it signals back to the send coil "fully charged" by shutting itself off (with rf magic to the spec).

[@mal2ksc]

2:31 You have been Goatse'd. What has been seen cannot be unseen.

[@ericksonengineering7011]

Great video! I've been working on low leakage currents using off-the-shelf DC-DC converters, mostly at switching frequencies. Love the AC leakage comparison. I just figured out a neat trick to reduce leakage on a split-core AC transformer even lower than the typical 1uA, by about 10x. Tried it on a Hammond 162G12, 12.6VCT, 12W. It reduces the AC leakage current by about 10x. The trick only works with 120VAC US power and off-the-shelf dual-primary transformers. You connect one primary of a dual primary AC transformer to the 120V line and neutral. Then connect the other primary reversed, with only the neutral connected, so it generates the opposite phase120VAC. The other pin of the second winding is not connected, it just floats. This out-of-phase winding cancels out the electric fields from the primary, and so most of the leakage current also cancels. I get almost a 10x reduction, a drop from 0.6uA to 0.06uA!. Of course the transformer won't perform as well with only one of its 2 primary windings connected: Less total power, more V drop. But damn is the leakage current low! Check the bottom of site below for more details. Dave www.djerickson.com/rpi-power

[@philipoakley5498]

Just wondering if one could use an autotransformer version of that same idea that would provide an anti-phase counter-winding in a balun style configuration?

[@theofficialczex1708]

"The main winding was of the normal lotus-o-delta type placed in panendermic semi-boloid slots of the stator, every seventh conductor being connected by a non-reversible tremie pipe to the differential girdle spring on the 'up' end of the grammeters." - what I hear as a mechanical engineer

[@zyeborm]

Now if he'd used spurving bearings be would have dropped at least a decimal on those ppms

[@friedmule5403]

LOL me too, but your humor made my day! :-)

[@Tikorous]

This is just silly. You can't use tremie pipe on odd-numbered conductors mate

[@friedmule5403]

@@Tikorous Not even if he tightens the flingnut on the reversible trom-joint?

[@Tikorous]

@@friedmule5403 we're trying to have a serious conversation here

[@EarlySwerver]

Would love to see more on the Nitecore power bank. Edit: Thanks.

[@scholztec]

A day with a Marco Reps video drop is a happy day indeed. Thanks for the awesome vids!

[@swisstraeng]

Marco's visual monologues are always great to hear.

[@reggindog3436]

I have a medical grade isolation transformer, it actually came out of an OR that was being overhauled. The downside is that is is not 1:1 or 2:1 is it was designed to give 120 from between from 3 phase so it is 1.9:1. It has a rated leakage current of no more than 10 microamps. It is not the highest isolation in the world, but the fact it is rated for medical use, I know I can depend on it.

[@akosbuzogany2752]

I think "Medical grade" means there is no capacitor to the ground in the filter, as in medical installations there are no RCDs (not to switch off any life supporting equipment) just alarms for signaling naughty electrons flowing where they aren't supposed to.

[@SolidStateWorkshop]

Medical grade power supplies can have capacitance to earth as long as the earth leakage current requirement is met. Up to 5mA is allowed, although rarely is the measured value more than 500uA. Medical power supplies have a lot of requirements, but the most relevant here relate to the #1.) Construction of the transformer/PCBA (to provide sufficient isolation) and #2.) Output (AKA "patient" or "touch") leakage current to earth, which mostly depends on the value of Y-class capacitors across the primary-to-secondary isolation boundary. In a non-medical power supply, up to 500uA "touch" current is allowed. In a Type-B/BF medical power supply, up to 100uA "patient" current is allowed In a Type-CF medical power supply, up to 10uA "patient" current is allowed (All these currents referenced to a standardized 1K or 2Kohm measurement resistor.) Basically, low leakage medical power supplies need to use small value Y-capacitors (or none at all), and usually need to play games with the transformer to keep the EMI low without using large value of Y-capacitors. For this application, Type-CF has the lowest primary-to-secondary capacitance, and would probably be a good pick.

[@txcpnae]

@@SolidStateWorkshop Hey! I recognised your profile pic instantly! Found your videos great when doing my introdoctory course in electronics :) Hope you are doing well

[@SolidStateWorkshop]

@@txcpnae It’s always so nice to hear that. Thank you. Once my life settles down a little, hope to put out some more 😉

[@hobbified]

No, "medical grade" means you can eat it and you won't get sick.

[@garbleduser]

@@SolidStateWorkshop In medical ultrasonic cleaners I have seen them get dangerously close legally to the legal line at ~490uA.

[@sid6p8]

There actually are industrial applications where high voltage isolation is required and power is actually send via optical fibre. Broadcom (formerly Avago) has a set of diodes and receivers for this, e.g. the AFBR-POC204L. You send 1.5W per laser and get up to 895mW out. If you need more power you could of course simply use several in parallel. ...though it might be a bit too expensive - the cheapest one is ~400€ at digikey...

[@frosty129]

400 euro for one watt?

[@sid6p8]

​@@frosty129 Actually even more. For €400 you only get the small power converter for about half a Watt. And you'll still need a laser to actually send the power. But if your sensor or actor is located near a high voltage source (>10kV), in a noisy environment, far away from your control system, it becomes a rather convenient and easy solution.

[@saucebosspl]

Oh, I have been waiting for so long. Good to hear you again Marco!

[@leosbagoftricks3732]

Great video, both technical content and entertainment value!

[@tHaH4x0r]

How about this idea: Charge up super capacitor for a given time period from mains (ex. 10ms) and then switch off the charging from mains power and run on the super cap during the measurement? As the power draw of the circuitry is likely much lower than the power you can supply to the super cap to charge it, I think the duty cycle might be appropriately quite low, thus making it possible to do measurements.

[@AJMansfield1]

That's essentially the approach discussed at 15:48 with the Fluke thermometers.

[@hikingpete]

@@AJMansfield1 Damnit, I was just hunting down that timecode, and you beat me to it.

[@craigs5212]

That was my first thought, flying capacitor power supply -- to be safe, think you would want to use relays to fly the cap, but that's a new can of worms.

[@mattweger437]

Or an array of super capacitors that you charge and then disconnect to discharge on the DC side

[@mattweger437]

Really you only need two super capacitors and then just have a timer or *gasp* a micro controller on each side controller a realy or two with some sort of opto coupler interrupt pin so you're never actually connected to mains. Like charging a bunch of batteries and switching them out but faster

[@TradieTrev]

hahaha I won't judge if you take your test gear on holidays! That was brilliantly done mate, I've been looking for a battery scope but now I'm convinced to get one.

[@FesZElectronics]

I kept thinking about this capacitive isolation requirement that you where trying to achieve; you mentioned around the end the use of an "amorphous metal transformer core" - this looks like a very electrically conductive material. I am bringing this up since if you would be using a ferrite core, that should not be electrically conductive, and also work better at the high frequency of a switching converter. So even if you are sacrificing a bit of magnetic permeability, the core its self would not be a path of capacitive coupling. In the final designs, it seems (to me at least) that the smallest physical electrical distance between primary and secondary is not over the PCB, but rather from wire insulation to the core, and core to insulation on second side. What do you think?

[@reps]

Interesting point indeed! I was swooning over amorphous cores so much that that didn't even occur to me. I'll try and find a ferrite core to test some time. (Or if you got around to it first, I'd love to hear your result!)

[@FesZElectronics]

@@reps I guess the other important thing to consider is that the leakage current between primary and secondary is frequency dependent - for a fixed voltage, the same capacitance will yield much lower current at say 50Hz (mains frequency) than 50KHz (a switching converter). In the end I guess its a compromise - get higher capacitance but work at low frequency or get low capacitance and try high frequency... However, high frequency means easier common mode filtration. This is quite an interesting subject :D

[@Graham_Wideman]

What?! FesZ and Marco Reps in conversation!? Not sure if my heart can take the excitement!

[@DavidSmith-zx7wz]

Good Stuff! I will gladly watch anything that you produce. Thanks

[@Luzt.]

You rock, Sir! You absolutely do! Thank you!

[@Ole-vu9yj]

13:45 Its called 'Power-over-fiber' or 'PoF'. AZURSpace has a 'Laser Power Converter Diode' (Type: LPC-810-x-00) with a maximum optical input power of 1.6 Watt. This device is intended to convert monochromatic light in the spectral range of 810 ±20 nm into electrical energy. Chip Size is only 1.82 x 1.82 mm.

I've just watched a 25 minute video and I couldn't even grasp the concept of it. Sexy hardware and godly voice was enough though.

[@Cubinator73]

13:35 "Light emitting resistor" :D

[@CoolDudeClem]

I can see how this could be a problem, but I've never really thought about it. For the kind of things I do, it's not a problem.

[@wlrIII]

I have no idea what you're talking about, but I love to hear you say it. Cheers!

[@-MrDontCare-]

You always crack me up with your humor! 🤣

[@cmuller1441]

I remember talking about that subject on eevblog forum years ago because I had the project of transforming relatively cheap but accurate dmms into table dmms. The goal was also to add logs, network connection etc... Unfortunately I never had time to go very far. For the solar part, I went the opposite way using cheap panels and lighting them with monochromatic LEDs. I don't remember the power I could transfert. The biggest issue with that solution was its size.

[@gregorymccoy6797]

Wonderful video. This one took a lot of preparation, too. Thanks!

[@fullpower8382]

Du bisch haltn richtiger Maker! :-)

[@foobarables]

If you want a low cost low stray capacitance DC/DC converter, you can use a common mode inductors as a transformer in a half bridge or full bridge converter.

[@TradeWorksLLC]

His deep & low Late Night Radio DJ voice just clinches it. Even while some [or most 😅] of whats being discussed quickly flys over my head, leaving me floundering like a 5th grade elementary schooler suddenly thrown into Pre-Calc, l can still surprisingly pick up the humor and find it genuinely funny even with only an apprentice level foundation of knowledge in electrical / AC motors / RC circuits combined with a bunch of sporadic random sampling due to my own interests in electronics repair.

[@rpavlik1]

Excellent and somewhat over my head, as always.

[@bluebottle4677]

Is the feuerwasser bottle at 22:10 for starting or putting out fires? Or just for drinking?

[@djfaber]

Another great video Marco!

[@KaspersMC]

Dam Good as always : ) Thanks

[@NNNILabs]

No one talking about that black 3458A :ifyouknowwhatImean:

[@SarahWattCA]

the toasty warm voltage standard is very cute

[@Nagria2112]

i have no idea why you so enternaining but i watched all of your videos even tho i literally have no idea what you are talking about 80% of the time. i´m a simple chemist and love my stuff. obviously i understand "some" very basic elektronics stuff and logic gates but thats it.

[@TeardownOZ2CPU]

CORRECT, This is extreamly important, for many things, I have been playing with low capacity transformators for a long time, I need this mostly on mains powered things, i really like the ideas with toroide types, and 3D printed holders / wires seperators, i think this idea can be scaled up to mains size on toroids too, i am clearly going to make a few experiments with this. maybe even another rotation of the cores ? to make even less capacity ? my comment got lost ? so now i try again hope it works this time

[@mattvoce1091]

Just love your vids mate so good. No nukes don’t worry about that, keep your research going it’s fascinating even though I understand about 50% of it.

[@johnnycash4034]

You are my hero. You should just know that.

[@dingolovethrob]

FABULOUS WORK

[@martylawson1638]

high power IR LED stacked on a solar cell array might work. Hard to get a watt across and not very efficient. Using a laser source instead does open up the possibility of fiber-optic coupling the two.

[@frustro4323]

Took me about 10 minutes to stop laughing at the light emitting resistor.

[@NiHaoMike64]

Perhaps the idea of one BLDC motor turning another as a generator using a plastic rod is worth revisiting. Some good quality bearings can last plenty long enough.

[@lyrebirdcyclesmarkkelly9874]

LED solution: use a high power blue LED facing directly into another blue LED of slightly higher wavelength. Best case energy recovery is only about 10% but if you are only looking for ~ 1W that's not a huge problem

[@johnschram5464]

is that a diy optoisolator?

[@godfreypoon5148]

You can reduce the leakage of an oil-filled transformer by putting some silicone sealant on the gaskets. Yes, I are very skilled engineer!

[@zyeborm]

Took me a minute, nice one

[@vincentguttmann2231]

One thing you should probably still try are the transformers that are commonly used in physics classes with those interchangeable coils and everything. Here, the cores are a few centimeters apart, however, I assume that coupling is less than ideal.

[@OpaqueWindow]

No idea what I watched but watched it all thanks👌🏽

[@BogdanO45]

Excellent explanation!

[@chain3519]

Finally making a video about me! Oh wait, you meant the electronics

[@leyasep5919]

I can't repress the thoughts of Electroboom sparks each time you plug a circuit to mains...

[@Vladimir-hq1ne]

@4:43 you need shielded cable. Cause you can have the same order of amperages due LED lights, powercords etc.. Upvoted, none the less.

[@InTimeTraveller]

The coax passive probe cable from the scope is shielded (since it's a coax cable) but indeed for such sensitive measurements his grounding and probing leaves me feeling a bit uneasy. I would much rather he had a short ground spring rather than this aligator clip that has a relatively huge inductive coupling.

[@Vladimir-hq1ne]

@@InTimeTraveller Yep, I was incredibly frustrated when used LED lights with cheap drivers with microampmeter. It was quite horrible. Just unscrewing these off and putting in 40W incandescent lights were enough.

[@tanishqbhaiji103]

1:55 why are you holding exposed live wires in your hand?

[@fingerimarschhd9190]

It's only the neutral conductor connected to ground. No dangerous power there.

[@berberger4814]

2:56 I like that guy looking at the resistor there

[@ecsciguy79]

That wasn't really what I expected guys who look at resistors to look like.

[@andymouse]

Love the warm white 'LER'

[@SolidStateWorkshop]

Consider looking for a Type-CF medical AC/DC adapter. These have very low leakage at mains frequency.

[@DantalionNl]

Why not power the whole things with 1000 optocouplers! its just about insane enough for you to try.

[@frosty129]

That’s insane!

[@VEC7ORlt]

Why not just a solar panel an some LEDs in a box?

[@alexbrown1050]

Is there really enough leakage current for that?

[@zvotaisvfi8678]

Great Personality!

[@Tehrasha]

Co-workers gave me questioning looks when I LOL'd at 'light emitting resistor' :)

[@mariomionskowski6223]

simply good investigation.

[@Pence128]

I like the motor generator idea. Chop the blades off a couple of PC fans and glue them back to back. Otherwise you could rip the cones out of a couple of loudspeakers and mechanically couple the coils together.

[@JxH]

*How about?* 1) Manual nulling with an adjustable out-of-phase counter measure ? 2) Active cancellation, where you actively measure the leakage and automatically null it out ?

[@anthonywilliams7052]

As I was taught in school, the cleanest voltage supply is a battery!

[@Maltanx]

W-wait! Where did that brand new black 3458 comes from? Didn't know you had one of the newer models!

[@kcasc_hd]

Its from Keysight, they make these for quite some time now (referenced in the original 3458 video)

[@gordonwelcher9598]

Would piezoelectric transformers be good for low leakage? Most of the ones I see have high voltage output but there must be some low voltage ones. You might not want a lot of ultrasonic vibration inside a sensitive instrument.

[@capnthepeafarmer]

19:15 I believe this is how fast Marco actually draws his schematics 😂

[@MrBlakBunny]

"so i'll take it appart, and you have to watch! mahahaha" Jokes on you, I am into that

[@stefanoconti4426]

Outstanding!!

[@zazio5535]

A simple yet brutal solution might be a deicated low coupling low CM-Noise gate driver supply module for power electronics, and throw in a bunch of CM-Filters. Because those modules essentially "converts" the noise to higher frequencies and make them easier to filter. Same idea as over sampling.

[@zazio5535]

AND by using a high quality mains Xformer and a SMPS together, the capacitance of them will be connected in series -> Further reduction of total leakage capacitance.

[@mafriese5]

0:42 - the perfect thumbnail doesn’t exi…