Inside a nasty high voltage ozone generator PSU. (with schematic) 

I hate it when other channels do that. If people want to subscribe then that is their choice.

People are running businesses. You're able to consume the content they produce, most which makes very little money, for free. So there isn't really any justification for complaints. Businesses advertise, and that's how they stay in business.

Andrew Delashaw I don’t have any problems with sponsorships or people making money. Brother gotta eat. All I’m saying is a little transparency and less begging goes a long way.

@@xenonram agreed and most people don't realize how important it is to like and share and subscribe. Some channels have no understanding of how RU-vid works. And why would they?. Clive's channel doesn't suffer from that problem.

@@xenonram No one told them to start a business that won't make money if they don't say the right incantation and do the right ritual. I watch several channels that have over 500K subs and never pray at the alter of the LCS gods.

I got a good chuckle out of that!

Chlorine trifluoride is what you need: "It is also hypergolic [ignites spontaneously] with such things as cloth, wood, and test engineers, not to mention asbestos, sand, and water - with which it reacts explosively."

He does have those bricks..... Hmmmmm.....

Just William ah someone else who has read Ignition. Great book!

*sings* T-shirt!!!

Come up to my room, let me show you my circuit diagrams...

I was just about to comment that the uvc is separate from the fish and filter it's just for killing algee if I'm not mistaken

Or "Fish Fried"

I was gonna say fish foe, but fried nails it.

Yea. I go for Fish Frier

Glad someone else made the comment. Non native speaker here, but from Europe across the channel. Friend or Foe/Fiend is common knowledge here on the continent. Brexit or not, we still love you. Cannot deny geography.

I was going to say "Fish -Fri- ender", but yours is better.

I can confirm that sunlight in the UK doesn't erase EPROMs even after several days! I haven't tried in in Greece.

@TheRageMaker Heat and sunlight ... not always the same thing ... oh yes I remember heatwaves in the UK .. much akin to a spring day in most of Australia :D ... Joking aside ... UV was a big issue in Australia (still is) as the depletion of the ozone layer at the Antarctic was up to the southern states ... it's abated a bit (since the 80's and 90's) with the global banning of flurocarbons in most things.

Bravo! And that is the end of the internet. Thank you all for coming!

I had a feline someone would say that!

Get out. You are hereby banned from the internet. If I see you make a pun like that again, I'll call the police. Maybe even the *swat* team.

Dont give up your day job..... lol

@@Polite_Cat As the highest authority on the Internet*, I declare him not guilty, given that making puns is not a crime. Sorry! * According to GRBTutorials (2020)

The challenge being keeping such away from your neighbors as well if you live in suburbia!

Btw if you can, reply to my message on Facebook if you use fb anymore?

I was feeling like a fish out of water until I read this ...... I’m glad I’m not the only one that’s clueless but keen lol

They have obviously discovered the limitations of it's design and then had to find the best way to suppress the fires ! "Oh no, this thing just keeps bursting into flames after 10 minutes of use, what are we going to do ?" "No need to worry, my cousins factory had a similar problem and now they have lots of this flame retardant resin going cheap" "Wouldn't it be best to re design it so it didn't catch fire so easily?" "That will take too long and cut profits, just seal it up so the air can't get at it, no-one will know any difference, it's not like anyone intelligent will succeed in opening it up"

Well, it's only shorting out the cap at the mains input to the whole thing. Once that's shorted out, it'd need to charge up again, essentially it's only letting a few drops of power through at a time. A capacitor is essentially an insulator, certainly at 50Hz for that size, so there's no direct connection. Only what little power can bubble through. A capacitive dripper, I believe they're called. It won't pop, and you wouldn't design a shitty circuit then hopelessly cover it in resin to stop it self-destructing. You'd go back and design a better one. The resin is because it it outputs, say, 10Kv, from a transformer that's, say, 5cm wide, the voltage will arc from one end of the transformer, through the air, to the other. So you won't get any power out of it, it'll all be consumed as sparks across the transformer. So, you put some good barriers in it's way, so any sparks would have much further to travel, long enough that there isn't enough voltage to do it. So the current behaves itself and goes down the leads to the ozone tube instead. Any fire-retardant is because you've got plastic around high-voltage stuff that might spark if it failed, eg the insulation cracked. Sparks get hot, and plastic is burny. So to stop a bit of cracked plastic burning your house down (these things NOT being sold direct on Ebay), appropriate measures are taken. The design's weird but it's not inherently dangerous. No reason to think it'll pop, it's one of Clive's rare items that's actually licensed to be used in this country.

That's what I thought as well, trying to absorb it.

Given the high frequency components of the spikes, even an iron core transformer would still act as a common mode choke, so it is likely doing double duty in that case. That said, this is a horrible circuit in so many respects from an RFI perspective for anyone who operates radio (or even simply cares to receive radio) as even if the transformer/choke prevents most of the back EMF spike from reaching the mains side they nonetheless used rather long unshielded conductors to the ozone generating tube that will serve as very effective antennas for radiating RFI (with peaks every 100/120Hz). It may as well be called a broadbanded radio jammer that happens to also generate ozone, sadly.

That makes sense. The machines produce a lot of marble dust.

It did a good job too, the bigger coils had a heavy, quality feel and nice sharp corners once they'd been "encapsulated" as the foreman called it. Apropos of nothing, that foreman had a big blond spade beard and looked exactly like an Isle of Lewis chessman. But I digress...

PCB traces and the diodes will hopefully blow open circuit, or the cheap and thin wire will do double duty as fuse as well. Betting that choke there though is wound with CCA wire, so it will definitely suffer failure from a few thousand pulse cycles and snap the coil wires inside from the repeated motor torque.

China. China came up with it.

And yet the manufacturer felt the need to protect his masterpiece from reverse engineering.

It reminds me way back when I was a kid playing around with a 3-volt relay. I discovered that you make a little buzzer by setting it up so that energizing the relay broke the power connection. It also sent static to the radio. I thought it was neat. Then some time later I discovered you could do the same thing by having the relay short itself out when energized, and it was much more noisy.

This is China we're dealing with, so I wouldn't hold my breath waiting for safe, responsible circuits when they view their own citizens as cheap and disposable.

@@hyperboloidofonesheet1036 My brother did something similar as a cruel science project for school. Using the commutator of a DC motor to make/break the circuit to a small transformer wired up backwards to use its primary as an HV winding. If I recall it had something like the ark of the covenant with two metalized statues that you would grab, closing a switch, and thus shocking the user.

Seems a bad idea, salt being corrosive. Especially where it's damp, say near large bodies of water. It'd corrode the PCB and component leads, nearby wires, screws, etc. Are you sure it's rock salt?

Our entire country is in desperate need of a break, I’m afraid. 2020 is turning out to be a very lousy year on so many levels, I really hope their will be some sunshine come 2021 as we need something to smile about once again. None of what is going on these past few months has been helpful for those of us who struggle with Complex PTSD/PTSD (regardless of the nature of the trauma).

Trump 2020

Depending on the potting compound, you can just dip it into a pot of boiling water for around 10 minutes according to this source ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OiPe6f4Oh8E.html . Makes the hard epoxy turn into soft stuff you can more easily scrape away. I have a bad habit of burrowing through it with a hot soldering iron with a pointy tip - it works, but not sure if the fumes are very safe.

@Kevin Counihan Also sold as "Aircraft Stripper". Nasty stuff, but useful.

@@threeMetreJim Most epoxies soften at around 70-90C as they reach their glass transition temperature, but for those that do not you can use a blend of methylene chloride, methyl ethyl ketone and acetone, sold by fibreglass shops as resin remover, and it does remove resin, amongst other things. Will also strip your skin of oils and fats, and will dissolve into you as well, so wear 2 pairs of nitrile gloves, and use in a very well ventilated area, and avoid contact with the stuff with the gloves, because it dissolves them as well, just not instantly on contact. Had some potting resin that took nearly a month to dissolve in it, releasing the PCB inside. OK lost all the resistors and capacitors outer coatings, but at least the IC packages survived, along with most of the PCB.

This thyristor only requires 200uA.

Yes - it is effective to have it so that only the tank water can be in its "sight". Like have a pump cycle the water through a container of some sort in which the lamp is enclosed at.

I usually just opted for several fish that ate algae and they were always very effective in preventing algae buildup back when I still had aquariums. They were a rather low maintenance solution since they largely took care of themselves.

And FFS be careful with these chemicals. They can be very nasty.

RCA XL-100 sets like the CTC-74 chassis models had them.

Think I'd be tempted to go chemical for a water cooling system and add some fountain algae preventer - usually based on benzalkonium chloride (BAK)

@David Burgin Those are different. They allow the water to run through a jacket. (Similar to the first unit he showed in the video.) The one in the video (the "fish enemy") is just a light, where the water uggs exposed on the outer surface. So if you paint it black, it will be rendered useless.

Sure but you'd keep blowing fresh air through it. You wouldn't want > 1% ozone in an inhabited atmosphere anyway, or anything like it.

I doubt that, in this case, if it's relying on the zero crossing to reset the thyristor it's going to operate at 100Hz, not really RF unless you're talking to submarines. Doesn't look like the circuit is resonant as I see it. There can be different causes for the same effect.

I wonder if the thyristor is being pounded to death, especially perhaps being in a linear region for too long due to the slow turn on? Perhaps put a heat sink on the tab? (which would have essentially mains voltage on it!)

Very similar to xenon trigger transformer circuit, but firing on every half wave.

Don't worry, version 3 will be coming out soon. cheaper epoxy (the stuff you buy in bulk for pennies per pound), and they will be filling it with the finest dried riverside mud as filler, with the special ingredient of ground up PCB material after the copper has been extracted as further filler. then that expensive inductor will be replaced, first with a smaller one with recycled ferrite core, then by one with CCA wire and a dozen recycled metal punchings as core. Version 6 will simply omit it for a recycled jumper wire, and a scattering of metal shavings on top with the epoxy fill. You remember those cheap power supplies with the power factor correction inductor in them, that was simply a transformer laminate pack ( because those are cheap) and a single turn of wire through it, then injection moulded to look like it was an actual transformer.

Tom Who needs radio reception when flying? Let’s just turn all our aircraft into flying broadband radio jammers...surely nothing could go wrong! I would certainly hope those never hot anywhere near any aircraft, though I would never put it past Chinese manufacturers to try!

Magnesium thermite.

Chlorine trifluoride. Burns through cloth, wood, test engineers, asbestos, sand, water

Hyperboloid OfOneSheet The rest of that quote is equally good and worth including: “It [ClF3] can be kept in some of the ordinary structural metals-steel, copper, aluminum, etc.-because of the formation of a thin film of insoluble metal fluoride that protects the bulk of the metal, just as the invisible coat of oxide on aluminum keeps it from burning up in the atmosphere. If, however, this coat is melted or scrubbed off, and has no chance to reform, the operator is confronted with the problem of coping with a metal-fluorine fire. For dealing with this situation, I have always recommended a good pair of running shoes.”

@@mrb692 Ignition!: An Informal History of Liquid Rocket Propellants. www.sciencemadness.org/library/books/ignition.pdf

@@FarleyHillBilly Yup, I have the PDF version. Hardcopies are stupid expensive (or were, last I checked).

No it is more there as a very cheap and very non reactive filler material, as it is basically silicon dioxide in pure form. It also prevents cracks from propagating in the resin, as it forms a crack stopper for when the stress from thermal expansion and from shrinking in curing breaks the epoxy itself. Slightly better thermal conductor than resin, but if you want better thermal performance you will have used fumed silica in a high proportion, so that it allows good thermal transfer through the resin, and also you use a lot less resin, though it makes for high wear on things like your filling machines as you are basically pumping grinding paste through them.

Thanks, new to me: en.wikipedia.org/wiki/Fumed_silica

There was an old type of aquarium (and lab) air pump called a hy-flo that produced higher pressure and less noise than diaphragm type pumps - just don't know if anyone still makes them. some videos of them working on yt.

I have a unit like that on my hot tub. Couldn't tell you the brand though. Could you use something like a computer fan, attach a venturi to it, maybe 3D print the venturi to mount up to the fan? I guess I'm not sure if you need high pressure low volume, or high volume low pressure. I have a portable unit the size of a small lunchbox I use in my pickup to get the smoke smell out. It's nothing more than a fan blowing across a few corona plates.

What if you used the low volume aquarium air pump to extract the concentrated ozone and then inject that ozonated air into the air stream of an ordinary fan to disperse the ozone into larger space?

If you mean the slots in the white resin it's me who cut those to explore what was inside. It's usually a solid block.

On the circuit board? The slots are cut to avoid "creepage", which is stray current going through contamination on the surface. That's different than "clearance", which is there to avoid arcing across the gap. A good way to think about it is that creepage is the distance that the ant crawls, while clearance is the distance that the crow flies.

The effect of resin depends on how it's applied. If the whole circuit board is cast into a solid block of resin then you are correct, breakdown is limited by the dielectric strength of resin, which is higher than the dielectric strength of air. But here, resin was just dribbled over the top, and it may have filled in the anti-creepage slots in the circuit board without covering up nearby conductors. Creepage is related to creeping failure: when an insulator has a high electric field along its surface, a progressive failure can occur, creating a conductive path along the surface. That gives it its name because the path slowly "creeps" from one conductor to another. It can occur at electric field levels even lower than required to arc through air. It only occurs on surfaces because it's partly a chemical reaction with air (that's also why different insulating materials have different levels of susceptibility). It can't cross air gaps because there's nothing in the gap to become conductive. So, if the circuit board has open slots in it, creeping failure can't occur across the slots. If the circuit board is completely covered in resin on all sides, creeping failure can't occur through the resin. But if there is just enough resin to fill the slots without covering the traces and pads, then creeping failure is once again possible, defeating the purpose of the slots.

Heat sensing cameras are IR, not UV. Wrong side of the visual spectrum.

I think it tastes bleachy. Some people do that as a health drink.

Ozone is used for water disinfection

It would probably be based on a Royer oscillator running at high frequency.

Last year I installed a 208V/240V 10A autotransformer potted in what I suspect was quartz filled resin. The filler was definitely some sort of crushed mineral, visible because the resin wasn't dyed.

That seems appropriate for the mail. Clueless misinformation.

JOKING!?!? It's amazing, in the Daily Mail's continuing quest to divide everything in the Universe into things that either cure cancer, or cause cancer, ionizing radiation didn't make it onto the "BAD" list. Still, their cretinism literally cannot surprise me any more. Fuck it, I'm gonna send them a pamphlet on the benefits of 240V mains for haemorhoids. I'll put loads of bits of soft-focus greenery on the pamphlet, as well as a woman in a lab coat holding a test tube. I'll make sure to call it something that sounds scientific but isn't, and dig through the bin under Deepak Chopra's shredder for an explanation of how it works. Getting Daily Mail readers to electrocute themselves, I might save democracy!