Fun fact: Space probes not too long ago were discovered having gyro bearings that were failing wayyy too soon. It was a mystery until they realizing that an electrical potential was developing in the bearing due to the solar wind of space acting on the craft. Ceramic bearings I believe have fixed this; however, there are some probes out there badly affected by this if not able to their jobs at all. F-ed up way to learn.
If you are enjoying Big Clive's approach to the subject then I recommend you read this book: "There Are No Electrons - Electronics for Earthlings" by Kenn Amdahl (ISBN 0-9627815-9-2). I am confident you will enjoy it as much as I did.
The metal machining method is spark erosion - used it years ago to remove two retaining pins that had originally been inserted very cold (to get a tight fit)
Chlorine like they use in pools, Sodium Hypochlorite, doesn't have a smell. What you're smelling in pools is the byproducts created when it has reacted with something. Dead skin or urine or spit or other organic matter. Which sounds kind of gross, but it's a good thing. It means it's doing its job.
A few years ago, while working on a capacitively sensitive tactile keyboard, we were advised that the pattern of electrodes for the capacitive sensor had an optimum layout. One electrode had to surround the other on a 2D plane and they must present the maximum capacitance to each other and one had to be minimally capacitive to the user's fingers. This lead to a challenging layout of sinuous tracks and castellations. It strikes me that the ozone electrode is similar. You want the rear electrode to be huge to create the area for the corona discharge but the front pattern must be as small as possible to create the maximum corona. The trouble is that the ablative effect of the discharge and the limits on depositing metal on ceramic mean tracks can only be so thin, but there must be an optimum layout. Perhaps something fractal like a snowflake.
Apparently some people use ozone generators inside their fan ducting, to help reduce any unwanted odours when cultivating certain 'herbal products' 👍👍Obviously I wouldn't know anything about that though officer.
I am entirely certain that you've explained this transformer before, but only now has it clicked why the separators on the Secondary winding are for, and, to a lesser extent, how this oscillator works. Thank you for providing such educational content!
The short aside to describe how ozone kills the corona virus is worth the price of admission for this latest BigClive video. Hilarious off-the-cuff material, Clive.
If that blue tape is Teflon (PTFE), they've basically created a tiny pulsed plasma thruster. They pass an arc through a chunk of PTFE which causes a bit to ablate into plasma that's passed between two electrodes (like a rail gun), and fires out at extremely high speed. They're low thrust, but super simple.
The ceramic bearings you mentioned are also used in space flywheels, since high energy particles usually made the metal bearings arching and degrading as you mentioned... It's bad for electric motors in earth, where you can replace them... but fatal in space machinery...
Come for the electronics reverse engineering, stay for the hilarious commentary and doodles. Bonus for the virus with the sad face and ozone doodles. These videos always make my day, thanks Clive!
What you were saying about the discharges across bearings actually became a big issue a few years ago with satellites. In their reaction control wheels they were noticing an extra high failure rate that turned out to be because of that. Also like in your example, they switched to ceramic bearings to fix the problem.
@@assassinlexx1993 Except they made and sold a lot of those bad reaction wheels, causing their customers to loose millions in failed satellites before the design flaw was found and fixed. So not that genius.
@@johndododoe1411 True there is lots of bad engineering. Just look under the hood. I was thinking how they found the problem and came up with a solution.
The felt nib wearing down on your pen is a common thing, most professional pens like those made by Copic are both refillable and have replaceable nibs for when you wear them out, drop them wrong or contaminate them. Downside is they can be difficult to find in your region or cost almost the same as a whole cheap disposable pen.
In my experience, cheap disposable pens often contain less ink than a quality refillable. That depends on how cheap a disposable we're talking about, of course.
Well, this is something new to me that there is even the potential of refill. I dried out a highlighter just the other day. From an environmental sustainability point of view, this is a help.
They really should include a couple of replacement nibs as they tend to wear down way before the pen is out of ink. or maybe have the nib be twice as long so that you can pull it out by a milimeter once in a while if it's not one of those with a sponge in the reservoir.
10:40 Perhaps the issue many are having with ozone is quite reasonably due to poor or misused ozone generating devices. As a kid i was gifted an air purifier that on practice was just an ozone generator with a fan, and it was so terrible, i can only compare that to having UVC in the room while there are living beings. I was physically unwell from that thing, and there were no warnings in the manual, i just thought i was being wrong by getting unwell from an "air purifier". 12:55 On chlorinated water, one important difference for me is that there are regulations and workspace safety stuff on that. In countries i'm familiar with, chlorination is likely to be done on the level of water supplier, strictly controlled, while an ozone generator might be just plopped randomly in the room and turned on without much thought put into it (or in case of "negative ion generators", or some "air purifiers" without even realising that it's an ozone generator). When properly assessed and installed i have no issue with ozone generating tech, i recall experiencing "plasmacluster" tech on a few occasions in Japan, i haven't even noticed before seeing a badge in a train or on an air conditioner. 3:30 o hey a tiny gas burner 4:12 Paper is quite an abrasive material after all. Feels terrible having to abandon markers and pens, still full with ink, due to tip losing shape. This is why fine art markers and pens might have replaceable tips (and also ink refills). Some manufacturers even sell less abrasive paper for markers and pens to prolong the longevity of the tips.
Hi Clive. Another entertaining technical video, thank-you. Re your comments on AC variable speed drives (AKA inverter drives) - I used to work in technical support on industrial drives for a "household name" manufacturer. (Not Siemens, see below.) The problems are all related to the super-high switching speeds of the modern semiconductors used to generate the square waves (pulse width modulated) fed to the motor windings (high dI/dt value). As you mention, some motor manufacturers use ceramic bearings but others use conventional bearings in electrically insulated housings (fibreglass or glass loaded nylon). The other problem encountered is early failure of winding insulation. The capacitance and inductance of the external wiring to the motor can effectively double the peak voltage "seen" at the windings. I once had a customer with a new installation who had motors failing after only 6-12 weeks. It turned out that in the original design (air conditioning plant in a big shopping centre) the motors specified were made by Siemens. At some point an externally identical motor (but much cheaper) from an Eastern European manufacturer had been substituted. When tested, all motor failures had insulation breakdown. The winding varnish in the cheap motors was rated at a lower insulation voltage than the originals. (Poorer quality control of the winding varnishing can also result in voids where corona discharge can erode the insulation.) The usual fixes are shorter wiring length between drive and motor (not practical) or addition of reactors between drive and motor to soften the rising and falling edges of the pulses (no room in the control cabinet or at the motor). The problem disappeared when the customer replaced his failed motors with ones from Siemens. I'll put my anorak back in the cupboard now...
Most Cancer studies use high concentrations of "toxic" things to simulate exposure over a long period of time. A tiny O3 maker not near you, theoretically, should have enough time to dissipate in the air before it gets to you. As you stated also, the effect in the air would be much like Bleach/chlorine. 😅
Naturally occurring Ozone also regulates the solar UV passing through the atmosphere. UV among other things can increase the odds of developing skin cancer.
I'll do you one better. The ozone layer had a hole in it and we had to abandon a more efficient refrigerant for one that wasted energy and not only was a greenhouse gas, but under pressure in the presence of oxygen would become acidic and ruin parts of your system. Anyways, with hole in the ozone layer that nobody unstood causing so much problems, a few of us got together and made low powered spark gap transmitters and Jacob's ladder devices which we ran 24/7 in our bedrooms with the window open for about 2 months before shit started hitting the fan. One guy got hit with a huge power bill and his parents grounded him for the rest of the year. The rest of us got a visit from the FCC. Turns out we were causing interference with several licensed bands used for alarm systems, a relay the county sherif used to extend coverage of patrol cars, and medical devices at a doctors office not far from one of us. And no they didn't find it cute or amusing that a couple of 12 and 14 year Olds were causing all those problems because we were going to replenish the ozone layer and save the world. I csn only imagine how much ozone we crested and inhaled.
@@techno1561 yeah.. a little wiser now. That wss almost 40 years ago though. Nobody actually knew how the ozone layer was created back then. We just knew it was there, or was important, and there was a hole in it.
Pretty sweet to be interesting enough of a guy to have 700+ people watch your video with in 15 minutes of upload. I have no idea what your talking about 99% of the time! But keep these coming 🤘🏻
About the conductors on ceramic, you can get a solution of solder that's basically painted on, either by brush or precision spray, and then that's flashed on in a furnace. This is a second stage of firing, and so you can have one manufacturer just making the bare ceramic pieces and sending them out wherever, and their recipients firing them again to get the coating on. This stuff is still liable to rub off if it's fired wrong, or if it's put under stress either chemical or mechanical though.
A few years back, you did the show on the UV-C lamp available from Ebay sellers, and it impressed the hell out of me. I loved black light, used to have one I bought from another GI when I was stationed in Nam. Had it hanging over my bunk illuminating a poster that said "What if they gave a war and nobody came!" A name of a popular movie back in the late 60's, in fact I watched it in the repo-depo in Oakland California while I was awaiting my transport Jet to give me my ride to Vietnam. So at any rate, I ordered one of those lamps, my intention was to use it to clear out mold in my old back room shop that had been shut down for years, and I did that. Then those TV commercials began trying to sell the CPAP cleaners, my daughter needs the CPAP machine and hates the cleaning, so it dawned on me that I still had that bulb in my back room. I dug out a ceramic light socket, mounted inside a plastic bucket lid on a bucket that once held cat litter, put a switch on it, and ran a cord out, the lid opened half the top, so I mounted the light to the other half, she now puts her mask and hose in that bucket, hits the light for about 5 minutes and her room, as well as most of our house is refreshed with the smell of post rain on the plain, and her breathing stuff is fresh and clean. Surely much cheaper then the 1000 dollar CPAP cleaner on TV and probably does just as good of a job.
As a kid I experimented with high voltage quite a bit, and I found a neon sign transformer connected to a large plate glass capacitor will produce a large amount of ozone. I used a piece of tempered glass from an old black and white TV set. The glass was 1/4" thick and about 20" square. This type of glass was used to protect the CRT in the old TV sets. The glass won't burn up like circuit board will. This is probably not a good idea for a hot tub though.
Am I the only one that makes a lady-parts reference in my head while watching Clive explain the discharge on the schematic. The more explanation, the more I wonder if Clive is even talking about electronics anymore lol 😂😂
Don't forget to point out how wimpy the Swedes are in their fake saunas when the thermometer is passing 60C and exclaim "that's the fake Swedish sauna temperature!".
Interesting device. I did think the video had the wrong title when I first opened it. It really does look like a speaker. Looks pretty typical for these units :) The bearing thing is interesting. Some earlier electric car motors suffered a similar degradation of bearings from high current leaking through them.
Hi Clive, very interesting as ever. On the chlorine smell in swimming pools...it's not chlorine you can smell...it's chloramines. Chloramines form when chlorine reacts with sweat and most usually other bodily fluids that "accidentally" leak from people when they can't be bothered to get out to use the toilet! You get rid of that smell by adding more chlorine. If the pool is well maintained and the chlorine level is high enough it hardly smells at all.
Eddy currents damaging bearings is a big issue with turbo alternators in power stations. Therefore, one set of bearings was insulated with tufnol bushes round the holding down bolts, and plates under the bearing pedestal.
If you want some good pens, get a set of Pigma Micron black sets. You can usually find them in the drafting section of the art store. You can get a variety pack with a lot of different tip sizes (but the one's I use aren't refillable by default)
The comment about caliper battery life: I had an employee that stored them sitting in front of a crt pc monitor (old equipment not worth upgrading screen to lcd) and the batteries seem to be dead every time we go to use them (handful of times a year) so that might be the reason.
AvE did a video a while back showing that the cheap ones have a quiescent current consumption a few orders higher than a good Mitutoyo. I have a cheap one myself, the batteries last a lot longer now I take them out when it's not in use.
@@OhShitSeriously mine is one from kobalt. We've had it for 10+ years and battery life seems to have significantly shortened in the last year or so. Taking the battery out isn't really an option because it is held in by 2 tiny screws that have been stripped out by my predecessors.
The metal goes on as a paste using a silkscreen. I just packed several of the stainless steel screens that were for putting silver onto ceramic circuits. They're now on a ship on it's way to our new home.
This might be a good idea for the house crawl space to reduce or eliminate dry rot, might even work on the *%$ wasps in the attic. Nice video, like the discharge patterns in the videos.
Those cheap calipers get bad battery life because the on/off button just turns off the display. Actually, a teardown on one of those with a focus on any mods that could be done to improve it/enable communication with a micro controller would be most welcome.
A stylish skid mark!!! Well butter my biscuits... You make me laugh. Good video as always. Wheee says the carnival ride.... Thanks for that tid bit, I never would have know. Always wondered why that was. Since I was a kid at that. Thanks Clive, you keep my aging mind questioning how things work.
I used Ozone every year to rid my car's AC from smell of mold and mildew. Works like you wouldn't believe. Just let the fan on recirculate and have one of these operate inside for an hour. It kills everything. It's not good for the interior, but screw the interior. By the time the interior is damaged, the car will be too old and time for the junk yard.
As I understand it, and someone correct me if I am wrong, the smell of chlorine around pools is actually the byproducts of the disinfecting process, the chlorates? from whatever the chlorine has attacked. I have also heard that a lot of that smell is from oils and sweat from people's skin and largely from people peeing in the pool. Iirc it's a reaction between the chlorine and the urea in urine and the byproducts of that reaction evaporate off/off gas easier than the chlorine itself.
When covid first kicked off around April last year, I was working at our city office (IT worker at an "essential service", so I still had to go into the office 5 days/week). The entrance is inside the foyer of a building that's also the head office of a large bank, and aside from the police stationed in the foyer suddenly wearing riot gear and carrying automatic rifles, the other thing that changed was that they suddenly started pumping huge amounts of ozone into the foyer. It was so bad, my eyes would sting and I'd start coughing if I breathed too much in the 15 seconds it takes to get into our office. And you could still smell it a fair way into our office, through both the automatic door and the security barriers (the floor to ceiling type with the two panels that lift in a arc out of the way when you swipe in). I really didn't envy those police officers. Although the goggles they wore as part of their riot gear would probably shield their eyes a little. And I'm sure their automatic rifles were highly effective against the virus too. After a couple of weeks they did wind down the strength of the ozone, and shut it off after a couple more. I was still glad when that project finished and I could go back to my regular office. A year on, I've been working full time at the office almost the entire time, catching public transport every day (even had our building shut down when a person in another office in the building tested positive), and I've managed to avoid catching the human malware. But I'm still looking forward to getting vaccinated, even if the EU doesn't want to let us have the vaccines we ordered.
That smell in saunas and swimming pools is Nitrogen trichloride not chlorine. Bleach by itself doesn't smell of anything but mixed with water or other substances does. Mark Rober did excellent video on this subject.
The swimming pool smell is from nitrogen trichloride as well as monochloramine and dichloramine, usually referred to as simply chloramines. These compounds form from the hypochlorite reacting with common nitrogen-containing contaminants like sweat, mucus, and urine. They all smell the same as chlorine gas though, so it's perhaps not surprising that people get them confused.
Not sure about the usefulness of that device given how the Finns regard the sauna as the most sterile place in a house with all the hot steam. Expecting mothers would sometimes give birth in the sauna, the heat helps relax muscles in the same way a birth pool would. This would have been when getting to a hospital in time was difficult. (British expat in Finland)
It's glued together so it doesn't have screws, nuts or bolts that rust in the hot humidity of the rooms its designed for. I'd wager glue isn't actually standard hot glue. At least that's what I'd assume.
Always a treat to see how BigClive dissects his victims like we did in biology class ;-) I would LOVE to see you tear down one of these High Frequency Tig welders!!! It fascinates me how these little light weight boxes can do the same job as the 200 lb transformer based welders!!! You make learning fun B.C., please don't ever stop!!! :-)
Same way SMPSes use much transformers than traditional ones. You use a smaller transformer, and use it to transform much smaller amounts of electricity, but more often. A teeny transformer would saturate pretty soon at 50Hz, and no longer be able to transform, because when the core is saturated there's nowhere further for the magnetic field to change. So have a circuit switch it on and off loads of times. If it takes 1/50,000th of a second to saturate, switch it 50,000 times a second!
"Non-conductive bearings" Yep, my old Heat-pump circulation fan (indoor unit) had the steel bearing balls eaten up by static discharge build up during normal operation. Took only like 3 years. By that time it made quite a hissing noise when spinning. Luckily Panasonic owned up to it and sent new ceramic bearings for free. It was nearly an hour long job on the first unit to figure out how to extract/replace the bearings. The tangential fan was wedged in good between evaporator coils =o( ...well, as it should be, to be efficient. I'm guessing all the dust particulates passing by the plastic fan wheel makes it act a bit like a Van der Graaf generator. Ha! The bearings was the second re-call issue for my heat pump model! First was a poorly written firmware for Swedish (well, nordic really) winter use. The original FW made the compressor (slowly) commit seppuku at the 2-3 year mark. Compressor beat itself to death by inadvertently running out of oil. It was a very intresting case, generated several thousands posts on internet forums around N. europe as folks where trying to find out why... since Panasonic didn't quite want to own up to their mistake at all first, but later exchanged compressors free of charge. People from all walks of life ganged up together and solve the real WHY because Panasonic officially blamed poor quality from a parts supplier when ACTUALLY it was their own FW.
I used to work in a factory that made polythene films. They use what they call a 'Treater' to rough up the surface of the film, to allow ink to stick to it. It is a sectional bar made from 2mm with teeth, so you can set the treat pattern. To much charges the film with to much static. The treater then blasts 40kV through the film running over a silicon covered roller with a gap, dependant on power and treat level required, to create the ideal corona. There was extraction, but on a hot dsy, you could see a fog in the factory, that hurt your lungs. Good days.😂😂
Sauna sterilization? Sounds strange to me. As a Finn I can confess that we wash our saunas with soft pine soap (mäntysuopa), definitely not sterilize them - it's a holy place for every Finn, electronics don't really belong to sauna, aside from lighting and possibly as a heating method when not using traditional firewood. ;) But an interesting video nevertheless, cheers!
Wow, I'm very surprised that all those hot tubs don't contain any sort of sanitization agent. Since the usual temperature of saunas is right in the prime range for bacterial growth, in the US we generally use even stronger concentration than in pools.
I'm late to the party, and this is semantics I know. But EDM doesn't cut materials, it vaporizes them. The technical term would be called erosion. It's like diamonds, you can't cut a diamond, you erode it. I went to school in Germany and they're very particular about you usinf the correct terminology haha.
Looks like the corona discharge part is made with the tech they used to use for thin-film hybrids, Clive. Screen-printed metal ( Silver and/or Copper ) slurry baked onto a AL02 substrate.
2:17 a minor note about those calipers - the "problem" with them is they come on automatically when you move them, but they are extremely sensitive to this and even vibration on the bench can "activate" them. Once I started storing mine on a more solid surface the battery life noticeably improved. The slightly more expensive versions which have a locking screw on top don't have this problem.
12:34 Thanks to Mark Rober's urinary endeavours I am aware that apparently the chloriney "pool smell" is apparently due to chloramines (particularly trichloramine) -- the resultant molecules after chlorine has reacted with pee [and, according to Google, other perspirants] in the pool. The health question piqued my curiosity so searched and found a document titled "Chloramines - Safe work practices" (2014) by WorkSafeBC (The Workers' Compensation Board of British Columbia). Although slightly dated, it suggests that professional swimmers (who do a lot of intense breathing near the water's surface) and pool workers are at risk from breathing difficulties or "occupational asthma" due to long term exposure. Kinda interesting.
The cheapy calipers seem to have high parasitic drain. Any time I've left the battery in mine for a couple months with it off it has drained the cell. It lasts a long time if I pull the cell if I'm not using it for more than a day.
That's because they are always on, it's only the screen that turns off. The chip is constantly looking for a change of state that means it can turn the screen back on.
The one thing I know about the chlorine smell from pools (or bleach, or other cleaning products) is it's not the chlorine you can smell, it's the reacted compounds formed with the chlorine, as chlorine itself is odourless which is what makes the gas itself lethal, the compounds formed are (allegedly) not that harmful, so are supposed to be safe enough for people working as pool lifeguards and whatnot...
They are making camping lanterns with COB LED's in them now. USB rechargeable with a dimmer. Yayyyy! May we see a test of the one that you think is the best (no diffuser on it, metal housing and 360 degree light, please).
If it looks like a speaker and makes a hissing noise, how long before some company clones it as a device with an actual speaker that does nothing but play white noise... Could combine it with one of those plug in power savers for a two in one device...
@@Alexander_Sannikov The spark generators can go pretty high before the spacing between the spark gap exceeds the insulation rating inside the units and they fail.
@@BigClive they can pot things in resin, separate windings on coils in segments, and do all sorts of other dodgy stuff. I wonder how far they can push it.
My pair of identical verniers were doing the same thing when I was trying to take measurement near a CFL. Took me a while to figure out what was going on.
@@BigClive Watched it back a few times, it looked like an arc running through the entire thing. You can see the first arc top left and a short moment later the second jump.
@@BigClive Hm, just went back and watched it again with fresh eyes and froze on the frame and yeah I think you're right, it might just be a reflection that just *happens* to look a lot like the kind of thin sparks I've seen these kinds of power supplies generate before. Real weird coincidence.
Build a proper Finnish sauna that is heated to around 90 degrees celsius and you don't have to use anything like that. Finnish saunas are quite often used to kill off certain bugs and their eggs in clothes and linen in cases of limited infestation.
Expected little carbon hairs but maybe that's the negative ion generator the Clive I really we all need you to do a docu educational video on the deathly two 40 UK variant of electricity that amazes me when I see you do low voltage Destruction videos
240V~ is just like 220V~ within margin of error. Whole world uses that, except the US being still stuck with rules from the scare tactics of the Edison vs. Westinghouse fight.
Some are into Leather... Some are into Lace... but give Clive some High Voltage.. and a smile will be on his face! is that a probe in your pocket, or... oh! you ARE happy to see me! ;)
@DanGraves1983 yeah i know the horror stories about 50-60c public saunas and the sauna Kiuas (stove?) without rocks and the heating elements exposed...
The reason for the poor battery life on those digital calipers is not external interference but the stupid "auto power on" feature. It means that in the "off" state only the display is shut down, but everything else inside that blob is still running.
Fun fact: Space probes not too long ago were discovered having gyro bearings that were failing wayyy too soon.
It was a mystery until they realizing that an electrical potential was developing in the bearing due to the solar wind of space acting on the craft.
Ceramic bearings I believe have fixed this; however, there are some probes out there badly affected by this if not able to their jobs at all.
F-ed up way to learn.
Goes to show it's hard to account for everything until you have experimental data from it.
Hi big Clive I love your videos! I'm only 11 and want to be an electrical engineer (you inspired me)
Hey I ended my appreciation half a year ago and love my job just keep it up mate
Great job kid! Keep it up, stay curious, and don’t be afraid to experiment and have fun!!!Just be safe!
same here
(this channel is in my dad's name,but i'm 12 and i run the channel)
That's great! Try not to get electrocuted by cheap crap off eBay along the way.
If you are enjoying Big Clive's approach to the subject then I recommend you read this book: "There Are No Electrons - Electronics for Earthlings" by Kenn Amdahl (ISBN 0-9627815-9-2). I am confident you will enjoy it as much as I did.
"made my fingers smelling burned pork ..." . made my day
fingers smelling of burned pork could only happen on this channel
The video was uploaded today, but your comment is from 5 days ago. What is going on here
@@gravi1517 Supporters get early access
Yep!!!! anytime I burn myself with the soldering iron my dogs come running thinking I’ve cooked bacon
😂😂
That remark made me hungry
The metal machining method is spark erosion - used it years ago to remove two retaining pins that had originally been inserted very cold (to get a tight fit)
"Electric Discharge Machining" is the fancy name, Applied Science did a video on it a little while ago.
Chlorine like they use in pools, Sodium Hypochlorite, doesn't have a smell. What you're smelling in pools is the byproducts created when it has reacted with something. Dead skin or urine or spit or other organic matter. Which sounds kind of gross, but it's a good thing. It means it's doing its job.
That hissing noise got my cat's attention, despite being across the room and relatively low volume.
The drawing of the scaremonger virus "It's got a big sad face with big eyes to make it look more deadly" ... That was funny! 😂😁
A few years ago, while working on a capacitively sensitive tactile keyboard, we were advised that the pattern of electrodes for the capacitive sensor had an optimum layout. One electrode had to surround the other on a 2D plane and they must present the maximum capacitance to each other and one had to be minimally capacitive to the user's fingers. This lead to a challenging layout of sinuous tracks and castellations.
It strikes me that the ozone electrode is similar. You want the rear electrode to be huge to create the area for the corona discharge but the front pattern must be as small as possible to create the maximum corona. The trouble is that the ablative effect of the discharge and the limits on depositing metal on ceramic mean tracks can only be so thin, but there must be an optimum layout. Perhaps something fractal like a snowflake.
14:14 "I did try experimenting when I was younger"...
..
That's all perfectly normal Clive, everyone does, it's nothing to be worried about.
😜
How else do you find out if the 5kV scale in your multimeter actually works?
Apparently some people use ozone generators inside their fan ducting, to help reduce any unwanted odours when cultivating certain 'herbal products' 👍👍Obviously I wouldn't know anything about that though officer.
Well, I do like some oregano for my pasta!
I am entirely certain that you've explained this transformer before, but only now has it clicked why the separators on the Secondary winding are for, and, to a lesser extent, how this oscillator works. Thank you for providing such educational content!
One of my favorite poking-live-high-voltage-stuff-with-a-metal-screwdriver-channels :)
The short aside to describe how ozone kills the corona virus is worth the price of admission for this latest BigClive video. Hilarious off-the-cuff material, Clive.
If my family had a since of humor, I’d forward this
If that blue tape is Teflon (PTFE), they've basically created a tiny pulsed plasma thruster.
They pass an arc through a chunk of PTFE which causes a bit to ablate into plasma that's passed between two electrodes (like a rail gun), and fires out at extremely high speed. They're low thrust, but super simple.
It's a conspiracy to turn the Earth into a spaceship. Enough of these get sold and the thrust will push Earth out of its orbit.
@@janneaalto3956 but earth is flat just like the pancake
The ceramic bearings you mentioned are also used in space flywheels, since high energy particles usually made the metal bearings arching and degrading as you mentioned... It's bad for electric motors in earth, where you can replace them... but fatal in space machinery...
Come for the electronics reverse engineering, stay for the hilarious commentary and doodles. Bonus for the virus with the sad face and ozone doodles. These videos always make my day, thanks Clive!
What you were saying about the discharges across bearings actually became a big issue a few years ago with satellites. In their reaction control wheels they were noticing an extra high failure rate that turned out to be because of that. Also like in your example, they switched to ceramic bearings to fix the problem.
Wow there are some really smart engineers.
@@assassinlexx1993 Except they made and sold a lot of those bad reaction wheels, causing their customers to loose millions in failed satellites before the design flaw was found and fixed. So not that genius.
@@johndododoe1411
True there is lots of bad engineering. Just look under the hood.
I was thinking how they found the problem and came up with a solution.
The felt nib wearing down on your pen is a common thing, most professional pens like those made by Copic are both refillable and have replaceable nibs for when you wear them out, drop them wrong or contaminate them. Downside is they can be difficult to find in your region or cost almost the same as a whole cheap disposable pen.
In my experience, cheap disposable pens often contain less ink than a quality refillable. That depends on how cheap a disposable we're talking about, of course.
Well, this is something new to me that there is even the potential of refill. I dried out a highlighter just the other day. From an environmental sustainability point of view, this is a help.
I loved my Pilot pens.
They really should include a couple of replacement nibs as they tend to wear down way before the pen is out of ink.
or maybe have the nib be twice as long so that you can pull it out by a milimeter once in a while if it's not one of those with a sponge in the reservoir.
like everything. i repaired a clothes dryer one time and the heating coil was 500$ on a 1000$ dryer.
Come visit Finland (when it's safe again) and we can check if it's safe in a real sauna. ;)
"let me turn off the light and zoom down on that" Me...OUCH, you just fried my nose!
10:40 Perhaps the issue many are having with ozone is quite reasonably due to poor or misused ozone generating devices. As a kid i was gifted an air purifier that on practice was just an ozone generator with a fan, and it was so terrible, i can only compare that to having UVC in the room while there are living beings. I was physically unwell from that thing, and there were no warnings in the manual, i just thought i was being wrong by getting unwell from an "air purifier".
12:55 On chlorinated water, one important difference for me is that there are regulations and workspace safety stuff on that. In countries i'm familiar with, chlorination is likely to be done on the level of water supplier, strictly controlled, while an ozone generator might be just plopped randomly in the room and turned on without much thought put into it (or in case of "negative ion generators", or some "air purifiers" without even realising that it's an ozone generator). When properly assessed and installed i have no issue with ozone generating tech, i recall experiencing "plasmacluster" tech on a few occasions in Japan, i haven't even noticed before seeing a badge in a train or on an air conditioner.
3:30 o hey a tiny gas burner
4:12 Paper is quite an abrasive material after all. Feels terrible having to abandon markers and pens, still full with ink, due to tip losing shape. This is why fine art markers and pens might have replaceable tips (and also ink refills). Some manufacturers even sell less abrasive paper for markers and pens to prolong the longevity of the tips.
Abresive standard paper is rough enough to clean dirty inkjet heads.
Hi Clive. Another entertaining technical video, thank-you. Re your comments on AC variable speed drives (AKA inverter drives) - I used to work in technical support on industrial drives for a "household name" manufacturer. (Not Siemens, see below.)
The problems are all related to the super-high switching speeds of the modern semiconductors used to generate the square waves (pulse width modulated) fed to the motor windings (high dI/dt value). As you mention, some motor manufacturers use ceramic bearings but others use conventional bearings in electrically insulated housings (fibreglass or glass loaded nylon).
The other problem encountered is early failure of winding insulation. The capacitance and inductance of the external wiring to the motor can effectively double the peak voltage "seen" at the windings. I once had a customer with a new installation who had motors failing after only 6-12 weeks. It turned out that in the original design (air conditioning plant in a big shopping centre) the motors specified were made by Siemens. At some point an externally identical motor (but much cheaper) from an Eastern European manufacturer had been substituted. When tested, all motor failures had insulation breakdown. The winding varnish in the cheap motors was rated at a lower insulation voltage than the originals. (Poorer quality control of the winding varnishing can also result in voids where corona discharge can erode the insulation.) The usual fixes are shorter wiring length between drive and motor (not practical) or addition of reactors between drive and motor to soften the rising and falling edges of the pulses (no room in the control cabinet or at the motor). The problem disappeared when the customer replaced his failed motors with ones from Siemens.
I'll put my anorak back in the cupboard now...
For a second I thought it said "sausage sanitisation unit" but then I realised, we've had that.
Most Cancer studies use high concentrations of "toxic" things to simulate exposure over a long period of time. A tiny O3 maker not near you, theoretically, should have enough time to dissipate in the air before it gets to you. As you stated also, the effect in the air would be much like Bleach/chlorine. 😅
Naturally occurring Ozone also regulates the solar UV passing through the atmosphere. UV among other things can increase the odds of developing skin cancer.
I grew up in a house with a laser printer in the 90s...I've think I've probably inhaled my fair share of ozone already, tbh.
I'll do you one better. The ozone layer had a hole in it and we had to abandon a more efficient refrigerant for one that wasted energy and not only was a greenhouse gas, but under pressure in the presence of oxygen would become acidic and ruin parts of your system.
Anyways, with hole in the ozone layer that nobody unstood causing so much problems, a few of us got together and made low powered spark gap transmitters and Jacob's ladder devices which we ran 24/7 in our bedrooms with the window open for about 2 months before shit started hitting the fan.
One guy got hit with a huge power bill and his parents grounded him for the rest of the year. The rest of us got a visit from the FCC. Turns out we were causing interference with several licensed bands used for alarm systems, a relay the county sherif used to extend coverage of patrol cars, and medical devices at a doctors office not far from one of us. And no they didn't find it cute or amusing that a couple of 12 and 14 year Olds were causing all those problems because we were going to replenish the ozone layer and save the world.
I csn only imagine how much ozone we crested and inhaled.
Is that what that smell was? I thought it was just how hot components smelled.
@@sumduma55 A noble motivation, but unfortunately, ozone made at sea level usually breaks down before it can get to the ozone layer.
I had an old B/W TV that pumped out Ozone from the HT line.
@@techno1561 yeah.. a little wiser now. That wss almost 40 years ago though. Nobody actually knew how the ozone layer was created back then. We just knew it was there, or was important, and there was a hole in it.
my favourite bit was where he poked the metal bit into the angry pixie thing
Pretty sweet to be interesting enough of a guy to have 700+ people watch your video with in 15 minutes of upload. I have no idea what your talking about 99% of the time! But keep these coming 🤘🏻
Good midnight Clive. Perfect timing for me to listen as I go to sleep.
(Not sarcasm you’re just really relaxing to listen to)
Clive is good for that. Very calming.
About the conductors on ceramic, you can get a solution of solder that's basically painted on, either by brush or precision spray, and then that's flashed on in a furnace. This is a second stage of firing, and so you can have one manufacturer just making the bare ceramic pieces and sending them out wherever, and their recipients firing them again to get the coating on. This stuff is still liable to rub off if it's fired wrong, or if it's put under stress either chemical or mechanical though.
I have an ozone generator in my hot-tub. It is amazingly effective at keeping the water sanitized and crystal clear.
And you can blame it for any extra bubbles.
Same here. But I’ve found that I still need to use chlorine, just not as much/as often.
A few years back, you did the show on the UV-C lamp available from Ebay sellers, and it impressed the hell out of me. I loved black light, used to have one I bought from another GI when I was stationed in Nam. Had it hanging over my bunk illuminating a poster that said "What if they gave a war and nobody came!" A name of a popular movie back in the late 60's, in fact I watched it in the repo-depo in Oakland California while I was awaiting my transport Jet to give me my ride to Vietnam. So at any rate, I ordered one of those lamps, my intention was to use it to clear out mold in my old back room shop that had been shut down for years, and I did that. Then those TV commercials began trying to sell the CPAP cleaners, my daughter needs the CPAP machine and hates the cleaning, so it dawned on me that I still had that bulb in my back room. I dug out a ceramic light socket, mounted inside a plastic bucket lid on a bucket that once held cat litter, put a switch on it, and ran a cord out, the lid opened half the top, so I mounted the light to the other half, she now puts her mask and hose in that bucket, hits the light for about 5 minutes and her room, as well as most of our house is refreshed with the smell of post rain on the plain, and her breathing stuff is fresh and clean. Surely much cheaper then the 1000 dollar CPAP cleaner on TV and probably does just as good of a job.
As a kid I experimented with high voltage quite a bit, and I found a neon sign transformer connected to a large plate glass capacitor will produce a large amount of ozone. I used a piece of tempered glass from an old black and white TV set. The glass was 1/4" thick and about 20" square. This type of glass was used to protect the CRT in the old TV sets. The glass won't burn up like circuit board will. This is probably not a good idea for a hot tub though.
Am I the only one that makes a lady-parts reference in my head while watching Clive explain the discharge on the schematic. The more explanation, the more I wonder if Clive is even talking about electronics anymore lol 😂😂
Look for the Lock Picking Lawyer's April first video
Thanks for the "light is coming back" warning
these units can't be found in the country of saunas (Finland). People suspecting otherwise can contact me for a visit in a real sauna.
Don't forget to point out how wimpy the Swedes are in their fake saunas when the thermometer is passing 60C and exclaim "that's the fake Swedish sauna temperature!".
Never have I ever even heard of a device such as this and I've been to maybe 30 - 50 different saunas in my lifetime.
I don't believe you!
Where do I have to go to and how long can I stay?
I pointed out that on the previous video, no bugs are going to survive 90C+ temperatures that the Finns enjoy in the sauna.
@@tpat90 Just come over and bring me some beer at the same time.. I'm running low.
Interesting device. I did think the video had the wrong title when I first opened it. It really does look like a speaker. Looks pretty typical for these units :)
The bearing thing is interesting. Some earlier electric car motors suffered a similar degradation of bearings from high current leaking through them.
"I digress" after 2 minutes isn't too bad for BigClive and one of the reasons why watching this channel is fun.
Hi Clive, very interesting as ever. On the chlorine smell in swimming pools...it's not chlorine you can smell...it's chloramines. Chloramines form when chlorine reacts with sweat and most usually other bodily fluids that "accidentally" leak from people when they can't be bothered to get out to use the toilet! You get rid of that smell by adding more chlorine. If the pool is well maintained and the chlorine level is high enough it hardly smells at all.
Ozone and UV are rubber and plastic's sworn enemies.
This unit produces both and will disintegrate in about a year in operation.
Anyone else get excited when big clive posts a new video?
Honey, did you change something in the bathroom?
bZZZZZZZZAP!
LOL!
Eddy currents damaging bearings is a big issue with turbo alternators in power stations. Therefore, one set of bearings was insulated with tufnol bushes round the holding down bolts, and plates under the bearing pedestal.
If you want some good pens, get a set of Pigma Micron black sets. You can usually find them in the drafting section of the art store. You can get a variety pack with a lot of different tip sizes (but the one's I use aren't refillable by default)
Nice to hear you also like electric lights of the orchestral variety...
And the remixes:-
th-cam.com/video/4_jwl-KO8t8/w-d-xo.html
The comment about caliper battery life: I had an employee that stored them sitting in front of a crt pc monitor (old equipment not worth upgrading screen to lcd) and the batteries seem to be dead every time we go to use them (handful of times a year) so that might be the reason.
AvE did a video a while back showing that the cheap ones have a quiescent current consumption a few orders higher than a good Mitutoyo. I have a cheap one myself, the batteries last a lot longer now I take them out when it's not in use.
@@OhShitSeriously mine is one from kobalt. We've had it for 10+ years and battery life seems to have significantly shortened in the last year or so. Taking the battery out isn't really an option because it is held in by 2 tiny screws that have been stripped out by my predecessors.
I've installed speaker enclosures similar to that, the 4 pegs would normally have spring clips, similar to ceiling lights that you just push in.
The metal goes on as a paste using a silkscreen. I just packed several of the stainless steel screens that were for putting silver onto ceramic circuits. They're now on a ship on it's way to our new home.
There are absolute encoder versions, but the cheap ones are all relative capacitive sensing versions.
I’ve found that hot melt glue and saunas don’t mix well.
I use a UVc tube periodically (when empty) in mine , plenty of ozone.
It really crushes my soul seeing you use plastic Calipers.
I do have a metal set.
Big Clive, Ozone and Burning pork smell, name a more iconic trio.
This might be a good idea for the house crawl space to reduce or eliminate dry rot, might even work on the *%$ wasps in the attic. Nice video, like the discharge patterns in the videos.
Those cheap calipers get bad battery life because the on/off button just turns off the display. Actually, a teardown on one of those with a focus on any mods that could be done to improve it/enable communication with a micro controller would be most welcome.
A stylish skid mark!!! Well butter my biscuits... You make me laugh. Good video as always. Wheee says the carnival ride.... Thanks for that tid bit, I never would have know. Always wondered why that was. Since I was a kid at that. Thanks Clive, you keep my aging mind questioning how things work.
I used Ozone every year to rid my car's AC from smell of mold and mildew.
Works like you wouldn't believe. Just let the fan on recirculate and have one of these operate inside for an hour. It kills everything.
It's not good for the interior, but screw the interior. By the time the interior is damaged, the car will be too old and time for the junk yard.
As I understand it, and someone correct me if I am wrong, the smell of chlorine around pools is actually the byproducts of the disinfecting process, the chlorates? from whatever the chlorine has attacked. I have also heard that a lot of that smell is from oils and sweat from people's skin and largely from people peeing in the pool. Iirc it's a reaction between the chlorine and the urea in urine and the byproducts of that reaction evaporate off/off gas easier than the chlorine itself.
When covid first kicked off around April last year, I was working at our city office (IT worker at an "essential service", so I still had to go into the office 5 days/week). The entrance is inside the foyer of a building that's also the head office of a large bank, and aside from the police stationed in the foyer suddenly wearing riot gear and carrying automatic rifles, the other thing that changed was that they suddenly started pumping huge amounts of ozone into the foyer. It was so bad, my eyes would sting and I'd start coughing if I breathed too much in the 15 seconds it takes to get into our office. And you could still smell it a fair way into our office, through both the automatic door and the security barriers (the floor to ceiling type with the two panels that lift in a arc out of the way when you swipe in). I really didn't envy those police officers. Although the goggles they wore as part of their riot gear would probably shield their eyes a little. And I'm sure their automatic rifles were highly effective against the virus too.
After a couple of weeks they did wind down the strength of the ozone, and shut it off after a couple more. I was still glad when that project finished and I could go back to my regular office.
A year on, I've been working full time at the office almost the entire time, catching public transport every day (even had our building shut down when a person in another office in the building tested positive), and I've managed to avoid catching the human malware. But I'm still looking forward to getting vaccinated, even if the EU doesn't want to let us have the vaccines we ordered.
That smell in saunas and swimming pools is Nitrogen trichloride not chlorine. Bleach by itself doesn't smell of anything but mixed with water or other substances does. Mark Rober did excellent video on this subject.
The swimming pool smell is from nitrogen trichloride as well as monochloramine and dichloramine, usually referred to as simply chloramines. These compounds form from the hypochlorite reacting with common nitrogen-containing contaminants like sweat, mucus, and urine. They all smell the same as chlorine gas though, so it's perhaps not surprising that people get them confused.
Not sure about the usefulness of that device given how the Finns regard the sauna as the most sterile place in a house with all the hot steam. Expecting mothers would sometimes give birth in the sauna, the heat helps relax muscles in the same way a birth pool would. This would have been when getting to a hospital in time was difficult.
(British expat in Finland)
In NA, usually we call that a plasma cutter (arcing enough electricity to cut steel, and continually oxidize the steel in that intended area)
It's glued together so it doesn't have screws, nuts or bolts that rust in the hot humidity of the rooms its designed for. I'd wager glue isn't actually standard hot glue. At least that's what I'd assume.
Always a treat to see how BigClive dissects his victims like we did in biology class ;-)
I would LOVE to see you tear down one of these High Frequency Tig welders!!! It fascinates me how these little light weight boxes can do the same job as the 200 lb transformer based welders!!! You make learning fun B.C., please don't ever stop!!! :-)
Same way SMPSes use much transformers than traditional ones. You use a smaller transformer, and use it to transform much smaller amounts of electricity, but more often.
A teeny transformer would saturate pretty soon at 50Hz, and no longer be able to transform, because when the core is saturated there's nowhere further for the magnetic field to change. So have a circuit switch it on and off loads of times. If it takes 1/50,000th of a second to saturate, switch it 50,000 times a second!
Have a few of the generator bits from eBay, couple of quid each. Used one to get rid of the 'doggy' smell in a used car we bought.
"Non-conductive bearings" Yep, my old Heat-pump circulation fan (indoor unit) had the steel bearing balls eaten up by static discharge build up during normal operation. Took only like 3 years.
By that time it made quite a hissing noise when spinning. Luckily Panasonic owned up to it and sent new ceramic bearings for free. It was nearly an hour long job on the first unit to figure out how to extract/replace the bearings.
The tangential fan was wedged in good between evaporator coils =o( ...well, as it should be, to be efficient.
I'm guessing all the dust particulates passing by the plastic fan wheel makes it act a bit like a Van der Graaf generator.
Ha! The bearings was the second re-call issue for my heat pump model! First was a poorly written firmware for Swedish (well, nordic really) winter use.
The original FW made the compressor (slowly) commit seppuku at the 2-3 year mark. Compressor beat itself to death by inadvertently running out of oil.
It was a very intresting case, generated several thousands posts on internet forums around N. europe as folks where trying to find out why... since Panasonic didn't quite want to own up to their mistake at all first, but later exchanged compressors free of charge. People from all walks of life ganged up together and solve the real WHY because Panasonic officially blamed poor quality from a parts supplier when ACTUALLY it was their own FW.
I used to work in a factory that made polythene films. They use what they call a 'Treater' to rough up the surface of the film, to allow ink to stick to it.
It is a sectional bar made from 2mm with teeth, so you can set the treat pattern. To much charges the film with to much static. The treater then blasts 40kV through the film running over a silicon covered roller with a gap, dependant on power and treat level required, to create the ideal corona. There was extraction, but on a hot dsy, you could see a fog in the factory, that hurt your lungs.
Good days.😂😂
Nice! Thanks Mr. Clive! Loved the video
"...burned pork." more like "burned bear" 😂
Text in thumbnails! Clive is evolving.
Sauna sterilization? Sounds strange to me. As a Finn I can confess that we wash our saunas with soft pine soap (mäntysuopa), definitely not sterilize them - it's a holy place for every Finn, electronics don't really belong to sauna, aside from lighting and possibly as a heating method when not using traditional firewood. ;) But an interesting video nevertheless, cheers!
Wow, I'm very surprised that all those hot tubs don't contain any sort of sanitization agent. Since the usual temperature of saunas is right in the prime range for bacterial growth, in the US we generally use even stronger concentration than in pools.
@@TravisTerrell No, a Finnish sauna often reaches 90C (195F), so definitely not prime growing conditions for bacteria!
I'm late to the party, and this is semantics I know.
But EDM doesn't cut materials, it vaporizes them.
The technical term would be called erosion.
It's like diamonds, you can't cut a diamond, you erode it.
I went to school in Germany and they're very particular about you usinf the correct terminology haha.
Corona discharge - a very cool effect
Looks like the corona discharge part is made with the tech they used to use for thin-film hybrids, Clive. Screen-printed metal ( Silver and/or Copper ) slurry baked onto a AL02 substrate.
2:17 a minor note about those calipers - the "problem" with them is they come on automatically when you move them, but they are extremely sensitive to this and even vibration on the bench can "activate" them. Once I started storing mine on a more solid surface the battery life noticeably improved. The slightly more expensive versions which have a locking screw on top don't have this problem.
12:34 Thanks to Mark Rober's urinary endeavours I am aware that apparently the chloriney "pool smell" is apparently due to chloramines (particularly trichloramine) -- the resultant molecules after chlorine has reacted with pee [and, according to Google, other perspirants] in the pool.
The health question piqued my curiosity so searched and found a document titled "Chloramines - Safe work practices" (2014) by WorkSafeBC (The Workers' Compensation Board of British Columbia). Although slightly dated, it suggests that professional swimmers (who do a lot of intense breathing near the water's surface) and pool workers are at risk from breathing difficulties or "occupational asthma" due to long term exposure.
Kinda interesting.
The metal is deposited on the ceramic as a paste trough a contact mask. It is then sintered in place at 800C.
The cheapy calipers seem to have high parasitic drain. Any time I've left the battery in mine for a couple months with it off it has drained the cell. It lasts a long time if I pull the cell if I'm not using it for more than a day.
That's because they are always on, it's only the screen that turns off. The chip is constantly looking for a change of state that means it can turn the screen back on.
The one thing I know about the chlorine smell from pools (or bleach, or other cleaning products) is it's not the chlorine you can smell, it's the reacted compounds formed with the chlorine, as chlorine itself is odourless which is what makes the gas itself lethal, the compounds formed are (allegedly) not that harmful, so are supposed to be safe enough for people working as pool lifeguards and whatnot...
They are making camping lanterns with COB LED's in them now. USB rechargeable with a dimmer. Yayyyy! May we see a test of the one that you think is the best (no diffuser on it, metal housing and 360 degree light, please).
If it looks like a speaker and makes a hissing noise, how long before some company clones it as a device with an actual speaker that does nothing but play white noise... Could combine it with one of those plug in power savers for a two in one device...
If you had bought it from your usual oriental source then the extra mounting clips would probably have held a microphone.
i've gotten myself calipers with a round dial
it's very nice
In Finland we don’t even go into the sauna if it’s below pasteurisation temperature.
I love your videos. Can you do video on VCD Radio frequency (RF) module teardown. Thank you Sir.
The casing looks like a 100V PA speaker casing, where the box on the back would house the 100V to speaker level line transformer.
Those posts might be useful for mounting a low voltage fan for ozone dispersal.
high voltage dodgy ebay devices is by far the most interesting subject on this channel, in my opinion.
They have a lot of them.
@@BigClive i wonder what's the highest voltage that they can go to
@@Alexander_Sannikov The spark generators can go pretty high before the spacing between the spark gap exceeds the insulation rating inside the units and they fail.
@@BigClive they can pot things in resin, separate windings on coils in segments, and do all sorts of other dodgy stuff. I wonder how far they can push it.
"my fingers smell of burnt meat" has the same vibe as your "hands smell like burnt pork"
A lot of the "chlorine" smell people associate with pools is actually the smell of urine that has oxidized with the chlorine.
You Sir need more upvotes. Knowledge has to be spread!
My pair of identical verniers were doing the same thing when I was trying to take measurement near a CFL. Took me a while to figure out what was going on.
I'd hazard a guess the form factor came ultimately from PAR 38 lamps via speakers meant to fit their receptacles.
Clive, the wizard of oz
When you first open the thing at 2:50 or so you can see it arcing internally, that doesn't seem... great...
I think that might just have been a reflection.
@@BigClive Watched it back a few times, it looked like an arc running through the entire thing. You can see the first arc top left and a short moment later the second jump.
@@BigClive Hm, just went back and watched it again with fresh eyes and froze on the frame and yeah I think you're right, it might just be a reflection that just *happens* to look a lot like the kind of thin sparks I've seen these kinds of power supplies generate before. Real weird coincidence.
Build a proper Finnish sauna that is heated to around 90 degrees celsius and you don't have to use anything like that. Finnish saunas are quite often used to kill off certain bugs and their eggs in clothes and linen in cases of limited infestation.
Expected little carbon hairs but maybe that's the negative ion generator the Clive I really we all need you to do a docu educational video on the deathly two 40 UK variant of electricity that amazes me when I see you do low voltage Destruction videos
240V~ is just like 220V~ within margin of error. Whole world uses that, except the US being still stuck with rules from the scare tactics of the Edison vs. Westinghouse fight.
AC/DC? I'm surprised no one spotted the omission of a bridge rectifier on the schematic. Signed Mr. Pedantic
Some are into Leather...
Some are into Lace...
but give Clive some High Voltage..
and a smile will be on his face!
is that a probe in your pocket, or... oh! you ARE happy to see me! ;)
As a fin I really dont understand why the eff would you need that in a sauna. The 80-120c temps in a sauna work well enough as a desinfenctant.
@DanGraves1983 yeah i know the horror stories about 50-60c public saunas and the sauna Kiuas (stove?) without rocks and the heating elements exposed...
@DanGraves1983 I'm not from Finland and I recall 1970s saunas running that hot when in use. Just take a cooler hot shower afterwards.
On a sunny day, I can smell ozone just by opening the window.
The reason for the poor battery life on those digital calipers is not external interference but the stupid "auto power on" feature. It means that in the "off" state only the display is shut down, but everything else inside that blob is still running.
14:08 Stylish skid mark could be today's t-shirt opportunity