USA 110V fridge sanitizer reverse engineering (with schematic)

Having already taken the 220V version of this product apart and discovered its use of a very small voltage multiplier, I decided to get a 110V version to see how it differed.
It's VERY different, with an extremely minimalist transformer pulse circuit that could find other applications.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.co...
This also keeps the channel independent of KZbin's advertising algorithms allowing it to be a bit more dangerous and naughty.

[@misterpentops3996]

Clive - your sleepless nights are much appreciated as the quality of you videos are superb. I have learnt so much from watching your technical explanations, and yours is without doubt my favourite technical channel. Thank you for providing such great content.

[@electricboyo]

Clive’s teardowns are the best I’ve ever seen. I’ve been a professional electronic design engineer myself for many years. My observation is this: It turns out that “reverse engineering” and “failure analysis” are two extremely important skills that aren’t taught in University. And when it comes to mass-marketed consumer products, clever design and component choice can make the difference between the “number one best product” and imitators which are total duds, suitable only for tossing into the bin. Clive gets it right by sorting out and throughly explaining the critically important aspects of the design and manufacturing processes that wind up with the result of the item being “excellent,” “dodgy,” or downright dangerous.

[@stridermt2k]

Thank you so much for the time and effort you put into these explorations! I keep seeing a vision of a lone figure hunched over his bench working through the night... as with many of us. :) Clive, the insight you bring to bear is as staggering as it is informative! The insight you bring to bears is something else entirely....

[@andrewedis9907]

It's saying that the video is "10 hours" from now old. Your comment says "2 weeks ago". What's going on here UTOOB?

[@LiyangHU]

@@andrewedis9907 Patreon

[@themadscotsman2159]

It's just after 4am Clive, can't you sleep. I'm on night shift, that's my excuse. saying that it's always interesting to see what you are going to pull apart and explain next. Keep up the good work.

[@Rafabenitez01]

Never mind that Andy , you just concentrate on the game Sunday , we need the win 👍

[@phillipbartlett1819]

Thanks for teaching me things I didn't know I wanted to know. I thought I knew a lot about everything but sir, you kick my butt. Love your channel. Best out there.

[@ironnam8107]

When we are finally visited by aliens the first thing they are going to ask is. Why is your polarity backwards?

[@peterg.8245]

Blame Faraday, he had a 50/50 chance and fumbled.

[@stuarttrock250]

@@peterg.8245 or Ben Franklin

[@IncertusetNescio]

Bit surprising they did completely different circuitry. Were they unable to do a 2x capacitive ladder using both sides of the board to make up the lower US/NA voltage?

[@BigClive]

It's possibly a cost balancing act.

[@truckerallikatuk]

@@BigClive Cost and size are the considerations. They probably couldn't get a double boost circuit to fit in such a small space, or it had issues like flashover or the like.

[@jameslmorehead]

Those component testers are the most ingenious things ever made. Think about what it has done for reverse engineering or trouble shooting a failed prototype circuit.

[@BigClive]

They are an incredible bit of design and software.

[@jameslmorehead]

@@BigClive I heard years ago that the guy that designed and coded the original got hosed. It was to be open source for non-commercial use, but everyone and their brother just ripped the code, popped it onto an exact copy or a stripped down version of his hardware, and undercut his pricing by half.

[@BigClive]

@@jameslmorehead That happens. It's a harsh, but useful lesson in life.

[@psneternityinanhour]

4am! Glad I'm not the only one who is nocturnal.

[@kareno8634]

Just what the World needs, *Clive,* _with Schematics in his head,_ *Sleepwalking - taking things to bits. = (|* lol

[@Alchemetica]

A daunting vision, a basis for the storyline of a B grade Sci-Fi movie of the 1950s. Electro-Man rises from the Luminescent Loch to strike terror into the very hearts of locals with his interplanetary Time Lord spudger. WARNING: Patrons with a weak heart are recommended to not view the movie. Nurses will be in attendance. [Karen how is it going with the Yeah, Yeah, Yeahs]

[@kareno8634]

@@Alchemetica lol. Brilliant start! Just wait till Clove goes after those ~ 'Full Bridge Rectifiers' . . . _one moment please_ . . . 8 (|

[@thomasvlaskampiii6850]

Would you rather hear Clive say "let's take this to bits" or LockPickingLawyer say "small click on one. Nice click on two" at 3am?

[@GreenJimll]

Ooh... is there a video about the little tester you showed at the end? That looks interesting.

[@BigClive]

They're a really common and amazingly capable device sold on eBay as a "component tester". Andreas Spiess made a very thorough video about them:- kzbin.info/www/bejne/aonWmGuipbVqa9U You can buy the bare PCB version as shown for about $10 www.ebay.com/sch/i.html?_from=R40&_nkw=component+tester&_sacat=0&_sop=15

[@skywing959]

I too am curious about this

[@gmtech68]

I have checked the link. Very informative.

[@marcoloos9395]

I immediately ordered one at AliExpress...

[@andrewedis9907]

I've seen lots of these and always wondered what was actually inside.

[@HowNotToDoEverything]

I particularly like the high quality artistic rendering of the transformer on your schematic.

[@TenOfZero1]

Hi Clive, long time watcher, I'm just learning electronics past few year (I'm 36 now, so just a hobby) and I really appreciate all you do and how awesome your videos are. I'm in Canada, so if you want anything form here, more than happy to help out, just let me know (or if you ever need French translations). Cheers !

[@camrouxbg]

Hah! Me too! I'm 42 and picking up electronics as a hobby. Loving it. Clive is fantastic. Also in Canada, though I don't have the French proficiency :(

[@christianlett]

46 here, and in the same boat! My thing is currently audio, building amps.

[@tinplategeek1058]

"have I ordered a 12v version?" - words that can only be said when you order so much crap from fleabay that you have no idea what you actually have bought.

[@DerCrawlerVomUrAnus]

But it's always exciting when a package arrives and you don't have the slightest idea what it could be.

[@TenOfZero1]

10:45 some of America is actually 220-240V, mostly in south America. And really north America is 240V as well, I know in Canada we are 240v, we do just one phase for the outlets at 120V, but the house gets 240V and large appliance do as well (stove, dryer etc...)

[@R_Forde]

Can confirm the US it is the same as Canada.

[@TenOfZero1]

@@R_Forde thanks, that is what I thought as well. I don't know why so many people think we have just 120v going into the home and we run our water heaters, baseboard heaters, thermopompes etc... on that. And really, I don't see why I would give more than 120v to my light and vacums etc... for the extra safety 120v provides.

It's similar in Europe, 400V into the house and 240 V at most outlets.

[@mattgies]

There's also 208V 3 phase power in the US (mostly only installed at industrial locations).

[@twocvbloke]

Not just me that stays awake when something fascinating is too much for me to put down to go to sleep, even if I'm dragging my eyeballs by the time I do... :P

[@rene0]

I have to admit Clive is one of them channels i just listen to for his soothing voice, i start the video then went to kitchen doing my sores, what's it all about, Ozone. Have to watch it all over again.

[@nirvana2117]

I just assembled and rgb led Christmas tree circuit board and I accidently put all the 40 LEDS backwards 😞

[@AntonBabiy]

F

[@bethaltair812]

I might have to try the 12v one too. If ionisers genuinely help pull stuff out of the air and can sanitise things my boat could definitely use one.

[@BigClive]

I'd say this unit is more biased to creating trace levels of ozone than ionising.

[@plhebel1]

I tore apart a tower fan that had stopped indexing L/R from center . It had a long , small diameter squirrel cage it use to move the air and the indexing of the housing was done with a bell crank and offset arm. Point of this reply is that it had a o-zone generator built into the system also as when I found the carbon filament discharger leads and circuits I wasn't able to come up with what this all was until much later. I still have the components stashed away in my electronics tote but to say it wasn't encapsulated like the one you struggled with and yes it was feed from standard 115 VAC,, It wasn't built like the one you showed but rather had the input section of the PCB have the multiplier for the higher feed AC if I remember correctly. Nice video , thank you Clive.

[@blindsniper35]

I have a 240-volt outlets at my workbench in the US. I just wired it for two phase instead of one phase.(3 120v phase is more common in commercial) if you do such a thing please use the right plug otherwise you'll plug in 120 stuff eventually.

[@mechlabman]

Clive, I believe that the diode across the scr also has the function of acting as a 'disconnect diode'' to insure that the scr 'turns off' right after the current pulse. This is quite important in scr switching circuits of all kinds.

[@tinplategeek1058]

🎵🎵 Double diodes work wonders, works wonders, works wonders, Double diodes work wonders, So use some today !🎵🎵 Adlibbed from a beer advert shown when I was a lot younger.

[@ferrumignis]

Be interesting to see how much radio frequency interference this produces, looks like it would be quite an effective transmitter and there are no suppression components or screening.

[@bdf2718]

There is quite a lot of screening when it's inside a fridge. There are gaps, of course, but a lot of screening.

[@ferrumignis]

@@bdf2718 Whilst the fridge cavity will be somewhat screened, that won't help with the inevitable RF conducted back out of the supply wires. No chokes/ferrites or other RF decoupling is present.

[@DrGreenGiant]

Super micro amps! Made me giggle! Great video again, that must have been a right pain to de-pot

[@snakezdewiggle6084]

Clive, your OCD commitment to Reverse Engineering is greatly appreciated. ;) Curious about the Potting Material, re: ionic migration / breakdown. The Inherent Capacitance across the Diode Junctions would be part here.

[@tonythediyer8537]

Yes, it seems that I see a lot of tiny transformers here in the US for high voltage on boards. BTW, we have been 240/120 Volts here for over 40 years (not 110). Thanks for your continued efforts and tutorials. Please continue your efforts going forward, it is much appreciated.

[@jackharper24]

noob question: why are some things potted or "glop top" is it for keeping secrets, durability, heatsync?

[@BigClive]

Sometimes to hide the circuitry, sometimes to avoid high voltage issues. In the case of blob chips it's purely the cheapest way to mount a chip on a PCB. Direct with wire bonds and then a blob of black resin to protect it from damage and light.

[@jackharper24]

@@BigClive thank ya Clive

[@CassetteMaster]

Digging this! These ionizers and other high voltage stuff potted in epoxy always fascinate me. The epoxy makes me want to see what's inside!

[@kevinheaton1653]

where does the little man that turns the light on and off when you open the door sit?

[@ATMAtim]

Good job sticking with it to removing that potting. Too bad it wasn't more friendly to you. I'm thinking of a couple of these for some projects at our house. Thanks, guy.

[@aswingsharif6729]

Thanks for sharing this. I bought some of those modules for no reason (just for curiosity and cheap price), now I have a weekend project to try 😀

[@dblitroot]

Try heating the compound with the soldering iron and check if that makes it easier to remove. I also find adding a bit of soldering flux (paste) and heating it that way sometimes makes the compound more 'rubbery' and easier to cut a small piece off, or to lift off components without too much residue. I don't know why, but it works for the polyurethane base compound we use.

[@piconano]

That's a lot of work you put into this video! Much appreciated. I'd trust the transformer version more. Not only because of galvanic isolation, but because it can run reliably between -20ºC and +50ºC. Capacitor version with SMD multiplayer ceramics, would crack and blowup after a few extreme thermal cycles. Trough-hole components are best. The stresses from expansion and contraction of the PCB and parts with thermal cycling, are better tolerated with leads acting as buffers.

[@Robothut]

Clive the circuit reminds me of one I have used for many years. I take a standard house type lamp dimmer, and a old 12 volt car coil and start cap in the 4 to 6 mf range to make spark effects. Like a small jacobs latter for example. They work great, they can run a long time with out anything getting hot. Thanks you for the teardown .

[@riverdolfi2846]

Big Clive, please make a video showing us your depotting tips and tricks for reverse engineering things the manufacturer doesn't want reverse engineered.

[@ralfoide]

It could be interesting to figure if they were actually made by the same OEM, or just rebranded by the same from different sources. The 240V version seems like it should be a lot cheaper to manufacture. Question: since this is voltage multiplier, shouldn't the 240V version also work as-is on a 110V source? (maybe with one more stage of diode/capacitor to get a similar output)

[@BigClive]

Each stage just adds one increment and not a multiplier as the name implies. The multiplier would have to be at least twice as long for 110V. I think these do all come from the same company. It's a fairly specialist device.

[@GadgetBoy]

Getting a CW adder-based ionizer working on NA mains without an expensive transformer is my white whale.

[@rickymherbert2899]

Your videos should come with a health warning Clive as I'm addicted now. Keep safe, keep wrapped up warmly and keep sane.

[@benbaselet2026]

I wonder when we start seeing boards with "V1.1BC" markings in them after the manufacturers improve their designs because of these videos :-)

[@BigClive]

To be fair. This company seems to have some decent designs.

[@GadgetBoy]

Today I learn why those transformers look the way they do. Question regarding ionizers. Do CW adders have issues with higher frequency ac?

[@BigClive]

At higher frequency they become much more efficient, so you can use lower value capacitors, but may need faster switching diodes.

[@davestech6357]

For a home built one you could use the parts from a scrap tv that has florescent tubes for the backlight. You probably have one or twenty laying around...

[@johnsenchak1428]

You need to do a video on how you make those blown PC board photos

[@howlingwolven]

Do you have the 12v ioniser on the way? I'm interested in seeing how that'd be different!

[@BigClive]

There is one on its way. They also do a 24V one, but I'm guessing it would be similar to the 12V unit.

[@fhkqdude]

it seems to function like a point less ignition module for like an old chainsaw or scooter

[@TheSlyMouse]

Thanks for putting all the extras time into this

[@Ionizerions]

I wonder if one of the emitters was thinner due to poor quality control. These low end modules vary wildly with ion emission. It’s a serious issue because if you have lopsided ion charge output, it can noticeably change results in air cleaning, or even make it worse. I don’t like low end bipolar ionizers for this reason

[@robertleach3080]

High voltage creates the ionizing, fresh , lighting storm odor (aromatic) If you choose.

[@getyourkicksagain]

Are you sure those transformers are custom wound for this application? They remind me of the transformers on inverter boards in older LCD panels.

[@fernandocruz3457]

the 12v and the 120v ones are for small fridarators for cars

[@jkbrown5496]

I wonder if the difference in the carbon brushes ins't to increase the efficiency of drawing in new air. The excess negatively charged air molecules would be repelled out, drawing in fresh air while also carrying ozone out. Clive, have you ever looked into flame rectification used in gas furnaces to prove the flame. It uses a 4 to 1 burner (ground) to flame rod surface area so the current is rectified proving the flame and that the flame rod isn't shorted to ground (if it was the current would be balance AC)

[@BigClive]

I've come across the ionisation flame rod detectors, but not the rectification aspect.

[@Hellsong89]

As suggestion would you like to check out Marshall Bluetooth speaker Stanmore 1? Those were supposedly high quality and pretty expensive speakers that blew very often after warranty was out. I dont have the internals no more since i pretty much rebuilt whole thing with chinese cheap amp and few scrap speakers to add load, but it would be interesting to hear what was the reason of the faults in them. I'm sure sourcing one blown one should not be difficult or expensive task.

[@nomusicrc]

What would happen if you touched the two ends together I’m glad there’s no slurping or masticating in this video lol

[@LiyangHU]

Very little. (Current passes.)

[@nomusicrc]

Liyang HU so nothing would happen

[@LiyangHU]

@@nomusicrc Not quite. Just very little. (Current.)

[@waldsteiger]

have you seen led starburst lamps? very simple to make and looks pleasing.

[@oswaldjh]

O3 generator in a closed environment attacking the copper and other metals will also generate warranty issues.

[@BigClive]

It's very low level, but will still potentially have an effect.

[@chrisstorm7704]

Hoping to see the 12v version some time in the future. I just purchased a couple of the 110v and 12v models to play around with. I'm curious to find out how much current the 12v unit uses while in operation, and also how wide of a voltage range can it effectively function. I'm hoping the run one on three series lithium ion cells.

[@BigClive]

The 12V one uses just 10mA.

[@tweed532]

'Sanitize' the hip word like ever thing was 'Turbo' a few decades ago. Just taken my car for MOT in the UK, (vehicle worthiness certificate for anything over 3 yrs old for viewers abroad), and was offered 'Full car sanitisation after the MOT tester had been doing their stuff'. '£29.99 and takes 15 minutes Sir'. 'UV or Ozone?' I asked. 'Don't know' was the reply. Needless to say politely declined. Nearly said I'll be getting a free dose via the TV on Saturday around 9.10PM.... :-)

[@kwdroneflights2374]

Another cracking video. Cheers Clive!

[@AntonioClaudioMichael]

Nice brakedown clive

[@afroninjadeluxe]

Why are separate windings seeing less voltage if they are connected in series as one longer winding? Is it not equivalent?

[@PiotrMichniewski]

I have a tesla coil kit from Aliexpress (which cost like ~$1.50) that generates surprising amounts of ozone

[@danielcardwell5457]

Hi clive can you elaborate further on the internal fuse you spoke about on the led bulbs you spoke about last video absolutely fascinating

[@nigozeroichi2501]

Nice, I might have to look into one for my fridge, maybe even two, or more to experiment with different de-potting processes, curiosity is a wonderful disease😁

[@R_Forde]

I have one I bought from amazon for my fridge. It is battery powered rechargeable and the size of a soda can. I can confirm it works very well for odor control.

[@jkobain]

Wow, so with these HV diodes they used the same technique as with HV capacitors by placing several identical ones in series? Cheap and clever.

[@AintBigAintClever]

Why couldn't they do the 110 volt version as a multiplier with additional stages? Or would this push the cost up to the point where it's cheaper to do the transformer version?

[@BigClive]

I'm not really sure. I was kinda expecting two multiplier boards, but it must be a cost balance. On one hand it would probably be impractical to make a 120V air ioniser based on the traditional European 230V multiplier. But the multiplier stage is much low in these units due to the vicinity of the fine carbon fibre clusters.

[@nightshadelenar]

from what i can understand, to get the same voltage that hte EU one puts out, they'd need a board with ~33-35 multiplier stages, which in the end is around $5.92 (as of Q4 2020) higher than the transformer type.

[@kreynolds1123]

I found it interesting that the transformer is an auto transformer. As a step up auto transformer, I found it surprising that the secondary didn't use any of the primary windings, as one of the advantages in typical step up and step down auto transformers is that the primary and secondary can share a number of turns, thus reduce cost if an isolation tramsformer is not needed.

[@LiyangHU]

To be fair, there are negligible primary windings in comparison to the secondary. Chances are they also use different wire gauges.

[@kreynolds1123]

@@LiyangHU For 10 fold increase in voltage i think tgey could have used an auto transformer with turn ratios 9,2,9 where the middle section is used as the primary with a turn ratio of 2 and the two outside coils and the primary coils (9+2+9=20 ) makeup the secondary and simplifies to 1:10. While the equivalent isolation transformer will have a full 10× more turns on its secondary but the auto transformer only needs 9× more because it is also using the turns in primary as part of overall turns. Granted, maybe a 10% reduction in secondary windings wont add up to much, but if you can do it and save a few pennies, and lower the transformer's secondary resistance by maybe 9% then why not? Yes the primary windings may likely need to be a lower gauge to carry higher current.

[@LiyangHU]

@@kreynolds1123 I don't think the saving on materials is worth the extra manufacturing steps. Just like the extra steps you took in your detailed response. :)

[@kreynolds1123]

@@LiyangHU Maybe, but to prevent shorting, the high voltage transformer is already constructed in the kinds of stages needed to make the kind of transformer i described.

[@assassinlexx1993]

Would a uv light in the cheese drawer of a fridge. Stop the cheese from molding?

[@jkobain]

Hi, Clive! This component tester you mentioned in the end of the video - it's an ubiquitous tester one can buy for cheap from China, right? And do you recommend a hobbyist buying one or another? Thanks in advance!

[@JoeKingAudits]

@bigclivedotcom I bought a cheap £17.99 Bosch mp3 player from Argos the connection to the earbud jack was horrible and the noises walking about was unbearable is that a flaw or just a really cheap and nasty way to connect a jack plug. Just I know gold is super conductive so creates better connections. So I was wondering if I get a gold jack on my existing ear buds maybe it will work better or do I need gold on the connecter also. PS I sent the mp3 player back.

[@simontay4851]

So does one of these in the fridge help to preserve food for longer. For example salad and dairy.

[@bluephreakr]

The device is dead, but at least we got to take a sniff at the treasures.

[@ruthmoreton6975]

My dyslexic brain initially read that as USA "110V reverse fridge sanitiser engineering". And was thinking "how the hell does that work and more importantly 'why?'"

[@Steffanovitch73]

Hi Clive, been searching through KZbin trying to find a good video that explains how to test a 12V triac. Seems they either over complicate it, or don't speak English. Please, please, please, could you correct this black hole in KZbin videos, or point me in a good direction. Thank you for many, many hours of entertainment and learning. I had never touched a soldering iron before watching your vids and the first lockdown occurred. Now my spare room is my electronic hideaway. Thank you.

[@BigClive]

Most triacs fail short-circuit if they get overloaded. That shows as a dead short between the MT12 and MT2 terminals. To actually test oine you could put it in series with a small lamp and then trigger it with a current limited DC source (like a battery and resistor) passing a high enough current to match the trigger current. Then apply that current between MT1 and the gate. The triac should latch on.

[@Steffanovitch73]

@@BigClive cheers

[@SlyerFox666]

Have you ever done a video on your depotting technique and equipment/ chemicals you've used ? 👍

[@BigClive]

Not really. Usually either acetone or heat.

[@Alchemetica]

Neat video and explanation. It raised a subject I am curious about. I am interested in devices that increase voltage. I have seen circuits that I believe are used in Taser personal defense devices. Both the ones that use a gas contained in the cartridge that houses the barbed needles and wires and the units that have two points that are held against the "bad guy" to impart a disabling charge allowing one to run away. Some Chinese market sites seem to have many units of various designs and I always wonder if they actually work as advertised or are a con. Nonetheless, how they work intrigues me. Is it something you would be comfortable dissecting, building, or discussing a circuit design?

[@LiyangHU]

Look up how a step-up transformer works, then read en.wikipedia.org/wiki/Flyback_converter

[@Alchemetica]

@@LiyangHU Thanks for the link, much appreciated

[@Peter_A1466]

How are those hi-voltage windings of the transformer connected together?

[@jabhomemonitoring]

Fantastic channel!! Thank you!!

[@marcoloos9395]

The RC time of the 2x 22K resistors and 100 nF capacitor is 0.0044 seconds. A quarter of the sine is 0.005. No coincidence I guess 😉

[@andygozzo72]

that transformer may not be custom for this, it looks like a transformer from a lcd backlight inverter, so as led backlights are now more common, there may be a lot of 'surplus' inverter transformers around?!

[@HyperSpaceProphet]

why not simply use an additiona; doubler stage(or two) in the 110Vac version?

[@BigClive]

It would need twice as many stages. Each one adds on the peak mains voltage.

[@soranuareane]

I have a bed fan I bought that's 1) too loud and 2) too fast at its lowest setting. I haven't looked at its circuitry to know how it works, but I presume it's a simple AC motor with a potentiometer for the switch. How should I go about slowing down the fan? Can I put a resistor in line with the pot to the motor?

[@BigClive]

Some switch windings, some have electronic control and some just switch capacitors.

[@frykasj]

What was that tester you used to test the thyristor?

[@phonotical]

You need to get yourself a small xray unit, and not the hammer! That way you won't have to cut through and melt away, just give it a jolt and get an image 😂

[@johnpossum556]

So what were the keywords of this circuit in order to buy one on ebay?

[@weerobot]

The Nocturnal Dissmanteler...

[@monchavo]

Hi Clive! I know you probably know this, but please, please be careful when stroking carbon fibre shards. A CF splinter is no laughing matter. I've had fibreglass splinters are they are excruciatingly painful, a CF one will be harder to remove and much, much worse.

[@BigClive]

I do keep this in mind, and avoid disturbing them too much as a result. Especially getting the stuff airborne.

[@ableite]

This circuit seems more expensive. Doesnt the mosquitoes zappers also create ozone? the circuit is smaller on those.

[@BigClive]

They don't. Their voltage is too low and they are not optimised for creating ozone.

[@ableite]

@@BigCliveBut it is possible to smell the ozone in the mosquito Zapper. I just don't know how efficient it is.

[@BigClive]

@@ableite Any spark will create ozone, but not efficiently.

[@ats89117]

The carbon fiber electrodes are effective for emitting electrons from the cathode, but are they really effective for the anode? I doubt it...

[@BigClive]

Both showed a slight corona discharge when looked at in a black room with a sensitive camera.

[@CAMacKenzie]

The wife says she is interested

[@raymondmucklow3793]

Cheers from frozen kansas

[@BigClive]

Cheers from icy Isle of Man.

[@hempbear]

Now that you have an X-ray it will be easier to open stuff up ;)

[@kay110]

What is the best product to use to dissolve potting compound?

[@BigClive]

I use acetone to slowly soften some resins. But this one took heat and time.

[@LiyangHU]

@@BigClive Try MEK next time? Or DCM.

[@ChriFux]

where can i find the original video on the 220v fridge sterilizer? couldn't find it sadly...

[@BigClive]

kzbin.info/www/bejne/oabXf5p5qK9lftU

[@ChriFux]

@@BigClive thanks!

[@ChriFux]

@@BigClive i just found out trumpxp has an official aliexpress store. it turns out like 80% of what you paid for your module in the video was for shipping. you can order more for a much lower price via aliexpress, if you are interested in checking out more of their stuff

[@tvsinesperanto7446]

What type of Voltage Multiplier did they use in the 220V version?

[@BigClive]

Just a dual capacitor/diode Walton Cockroft multiplier.

[@tvsinesperanto7446]

@@BigClive Yeah, I figured it'd be a W-C but just wanted to check. Looked like one. My eyes aren't what they used to be though. Thanks for taking the time to answer mate. Greetings from sunny Sydney Australia!

[@teatrolites3446]

Idk why, but I thought that the title was wrong, and autocorrected from bridge rectifier

[@English-Sparta]

Hello big man. I have a vax vacuum cordless battery. Only a couple of months old it’s already faulty. Just wonder if you could have a butchers and see what’s gone wrong. Couldn’t find an email for you.

[@OttawaOldFart]

How are you going to re-pot that now?

[@LiyangHU]

With the help of eBay & PayPal.

[@OttawaOldFart]

@@LiyangHU LOL

[@TimLF]

Anyone know of a test/tear-down of one of those whole house surge protectors?

[@BigClive]

I did a Chinese one.

[@TimLF]

@@BigClive this one: kzbin.info/www/bejne/fIK7lpaKgp2sq9E ? I was thinking of something 10x the price but am concerned about what's actually inside...

[@piconano]

Do you have any means of measuring the output voltage? High voltage probe? I'd be very curios to know what each of those modules produce.

[@BigClive]

It's hard because a high voltage probe would load the output down.

[@piconano]

@@BigClive good point.

[@piconano]

@@BigClive However, assuming your volt meter has a 1 Meg input impedance, you could use a 10Meg resistor in series with the output. Making a voltage divider out of the 10Meg resistor, and the 1Meg impedance of the meter. What you'll read on the meter, would be ~ 10x smaller than what's at the output if you use a 10Meg. 100x smaller, if you use a 100Meg resistor. Why would that not work? Logic says it should.

[@rayc5079]

How did you disolve that black module ?

[@BigClive]

Acetone and heat (not at the same time).

[@nightshadelenar]

@@BigClive why not at the same time? flames are always fun.