wearing decent over the ear headphones and the first time you powered on the first device my teeth started vibrating. that was quite the sensation hearing that little thing run.
Might be even more interesting with bone conduction headsets like Aftershockz. High pitch tones were a mixed bag with those, some were excruciatingly painful. Like nails into your temples kind of sensation. Other high pitch tones it took the edge off so much they sounded smooth instead of spikey.
Big Clive, I do like when you highlight the features of the design related to electrical safety: gaps in the PCB in order to get long enough creepage, proper bonding of PE to a conductive case, identifications of the insulation barriers when double insulation is required, when the designer went for double insulation instead of relaying on PE/RCD, need for a tool when a potentially live part could be touched, ... I feel I benefit when attention is brought, even briefly, to the practical design strategies which guarantee electrical safety.
What's worse are the Chinese sellers that ship via an office in the UK, so the seller location is listed as the UK, but you still have the shipping time from China, cus they're not selling from stock in the UK. The UK address is just a front. It's just a place they forward the parcels from China from. Slowly, but surely, they're taking over EBAY. And people usually can't spot from the photo and listing details, that the product is garbage.
It must also generate a ton of RF interference. Perfect to prevent your neighbors from watching DVB TV or listening to the radio. Did you check on that Clive ?
Excellent point. Our fave Manxman needs to get himself a spectrum analyzer, or at least gin up some LED indicator circuit that monitors the AGC level on an AM radio.
Might as well put an antenna on the output just to see how far the noise can travel. (AM band at nighttime, probably detectable ½ way around the world.)
It's interesting that the circuit is quite different between the 2 wire and the 4 wire version. you would have thought they would have used the same 4 wire PCB but just omitted the relay and associated components.
I was going to say, I had a pack of E series and that came as a value. Edit: just looked in it, it came with 5, I've used 1. Kit of some 800 E24 1%'ers
@@SupernovaSpence 5% E24 you can bet that some are marked differently and yet are the same measured resistance, or the higher marked can actually be lower in resistance. Only way you get a 5% E24 range is because they are the outliers from selecting the 2% parts out.
@@demef758 the formula gives a good approximation but it's off in the middle of the range (in the E12 series it would calculate 2.6, 3.2, 3.8, 4.6 instead of 2.7, 3.3, 3.9, 4.7). I've graduated in electronics engineering in 1994 and never seen the formula, but I can still recite the E12 series even if you wake me up in the middle of the night 😄
Oh for the good old days of colour TV with vacuum tubes and CRTs. On 25 inch colour TVS, the CRTS were fed as high as 40Kv via large flyback transformers. I cut my electronics teeth on repairing them or doing weird things with them (one time I built a radio telescope out of one). While the current is generally too low to actually injure you, contacting it could provoke some pretty spectacular muscle reactions. A buddy repairing the family TV (live of course if you need to adjust something) had his father come to the door and say "how's it going?". Paul was startled and contacted the 40Kv, and the screwdriver he was holding magically disappeared from his hand and then reappeared punched all the way through the doorframe inches from his dad's head. His dad learned to avoid possibly startling him if he power is on, and we both learned to be a bit more careful around CRTs. Even with the power off, always discharge it safely. A 25" CRT is a pretty good capacitor. My University physics TA (in a custom 8 bit microprocessor course the two of us "invented") was truly evil. He had this habit of sneaking up behind us while the power was on (often an open chassis with 120V mains transformers in the DIY linear power supplies and many live points) and slapping a wooden yardstick down HARD on the heavy composite lab tables we worked on right beside us. Sounded like a gunshot. EVERY FLINKING TIME we had a heart attack and chased the TA back into his office which he locked, while he was giggling his head off.
@@fromagefrizzbizz9377 It is possible with practice to learn how to clap one's hands together to make a sharp snap that sounds just like a high voltage DC discharge. I will not admit to having done this trick while the DEC repair guy had his hands inside the PDP-11/40. No one was injured, not even the PDP-11.
@@amazing7633 Ah yes, PDP-11's, the first computers I ever really loved - well, except for the 8 bit micro I built myself with the colossal memory capacity of 256 bytes. Oh the stories we could tell about them. The time the PDP-11's processor board decided to go the wrong way on a branch instruction, and the techie insisted we were nuts. Or how the arrangement of wires on the backplane caused the computer to crash on a specific sequence of instructions.
Here I was looking all over for a "chopstick sanitizer" and couldn't find one anywhere!! Silly me, I never thought to do a keyword search on "Universal Ozone Generator Negative Ion Sterilization"... duh, so obvious now!! Thanks for that, now all my chopsticks are germ-free!! 😋
It's bedtime at the end of a very long week. I open UA-camr for my evening prayer and see this stinkin' _CliVideo_ with all the elements: eBay, mystery, cheap plastic box, *high voltage!* Heaven can wait 11 more minutes, I guess...
It's always difficult figuring out exactly what happens in rectifier circuits but I think that this circuit is cleverer than it looks. I think that the thyristor fires twice in each half cycle and pulses the transformer at 200 Hz. In other words it charges and discharges the output capacitor once on the way up and once again on the way down. The thyristor doesn't conduct for 2/3rds of the half cycle as shown by Clive because the current falls to zero at the top of the sine wave and so the thyristor turns off. The capacitor then recharges through the other half of the bridge rectifier as the voltage falls towards zero and the thyristor triggers again when it reaches about 100V.
No, no, you were right the first time. Its aluminium now. IIRC, at a symposia a while back the issue of multiple names for elements was being addressed. And in exchange for some elements being officially named the way we name them we gave up aluminum for aluminium.
I appreciate the follow-up for us split-phase types. At 110-120V my rectal-number-generator pulls out a 180k substitution for the thyristor trigger divider as the closest E12-series or a 200k if you feel like stocking E24. Not likely that I'll order one just to test and I don't want to root out any mean squares tonight.
I have ordered 8 seperate packages of an illegal device from China from separate sources- only one got snagged by customs. The others delivered just fine.
High speed drum printers used to have a power supply for a neon light that would go to thing the length of the paper width. The thing had a sharp pin every inch and when the paper passed over it it would ionize the air and paper, i.e., make it conductive and it would allow the paper to fall into its basket rather than stick to the wall or the ceiling because of static cling. The printers printed so many lines a minute but they also had a slew rate between printed lines that was a lot faster. Some forms like stock certificates and checks only have two lines printed on a sheet so this was particularly necessary in dry climates.
@@bigclivedotcom Going to guess the tube is merely a glass tube and the fill gas is air, using a dual stage vacuum pump down and then seal, so that it can easily be ionised. Steel rod with nickel plate for the inner electrode, because that is cheap and shiny, and you can get a semi good metal to glass seal on it as well, plus just a quick bit of sanding on the outside through the plate and it is sort of solderable.
That 2W10 outline almost looks like it'd be a common mode choke, however not wired to pass both active and neutral. Potentially just an inductor in that little common mode choke/transformer form factor. The two pins on the "input" side and the 4 on the "output" side feels like a transformer form factor to me. Not particularly sure what purpose an inductor there would have, perhaps just to help with the current spikes?
I think my partner got one of these, I hear that same sound coming from our bedroom of a night while I'm studying in the sunroom. He's turned it on nearly every night this week too so it must be working.
You know how the Borg always seemed to use plasma discs in their alcoves for arcy-sparky effects? This thing would be useful as a Borg implant, though where it is inserted would be up to your imagination... :P
The is a pretty strong electric field near the box. You should be able to light up a neon bulb 6 inches (15 cm) away. When I worked on ozone generators, we complied with CISPR 14 for EMI/EMC. The problems for emmisions were near-field E field and conducted noise on the power cord.
The just couple the current evenly to the inside surface of the glass. Then it capacitively couples to the outer mesh, causing a corona discharge around it.
I learned a lot from this. Especially how these led nightlight power supply and phone chargers work. I always wondered how they worked without a transformer.
Wonder how long the plastic housing might last? Ozone's pretty aggressive, and can really wreck even nitrile rubber o-rings over time. Silicone o-rings seem slightly more durable.
Despite what you say Clive about that the circuitry could be more efficient, I really think this is a neat simple design with one thyristor (SCR). One problem with a thyristor is the way to stop it conducting once the gate voltage is gone: OR in the first place you never exceed the A-C current above the hold current of the SCR, OR when used above the hold current (in this case) you make the A-C current manually zero. In this device they've used the reversed emf on the coil to stop the current.
@@johndododoe1411 I think the 120VAC version would be the same, just change the resistor ratio slightly. The thing to make the high voltage there is dV/dt, the speed of the turn on of the thyristor, so the secondary circuit can generate the fast rise time pulse. So long as the capacitor on the primary side has enough charge the limiting factor is the tube strike voltage, which is a lot lower than the open circuit voltage the transformer can produce, though that also is limited by internal arcing through the distributed secondary.
I just have a quick question for you. I am quite a noob about electronics and there is something that I never quite understood about capacitors. What is preventing them to discharge into the "charging part" of the circuit instead of the part that you want to dump that high voltage into? My only guess is that you can use diodes to prevent the electricity to flow back into it but are they strong enough to not get fried by all this high voltage? Or maybe there something else that I am missing?
@@Reth_Hard I can see the confusion, but to understand you have to look at the circuit. For example a smoothing capacitor after a bridge rectifier does not feed back through the rectifier (because it IS a set of diodes that rectify the voltage) but instead sustains the voltage during the altering voltage trough. That's a parallel application. A dropper diode is a series application and that's a little harder to visualise. If someone could explain it to me I'd really appreciate it, but I've always imagined it as a charge pump. The -ive side of the capacitor is actually +ive wrt ground but the capacitor will only "conduct" as much energy as its specifications allow - which is why dropper caps are usually rated in (a few hundred) nanoFarts. That "energy" will result in mains voltage if you measure it with no load, but under load a much more friendly voltage will usually result. That's why Clive and everyone else is a bit suspect about dropper capacitors in the wrong application. A component malfunction could result in mains voltage where you don't expect it, or a wrong polarity could put the device case/earth at mains potential as we've seen in a few videos. A third application is as an R/C (resistor/capacitor) filter. It's a series application with a resistor (that's the filter part) but it is in parallel with the signal. That means it dumps resonant frequencies to ground/-ive. I also think that I'm a lousy electronics teacher, and this probably hasn't helped you in the slightest LOL
@@Chris_the_Muso Thank you anyway... :P To be honest I forgot that capacitors were often used for filtering curent and were just assuming the one we see in the video was used for pulsing current into the mesh thing. I'd like to learn just enough about electronics so I can repair some of my stuff when it's possible instead of dumping it in the garbage. I feel like it would be better for my wallet and the environment.
0:35 "For sterilising chopsticks" That's curious, as if i'm not mistaken in mainland China chopsticks used in restaurants are most likely to be made out of melamine (or plastic in general). Wouldn't sterilising in this way degrade the material over time. It actually would make more sense in Korea where metal chopsticks are most common.
Haven't spent much time in mainland China to informedly comment as well. Wooden non-disposable ones are probably preferred everywhere for home use, but not well suited for public establishments (for that, in Japan, there are disposable wooden ones, but that's wasteful as opposed to Korean metal, and Chinese plastic).
I'd bet most of the wattage of that circuit is the thyristor shunting, rather than discharging to pulse the coils. Do you know about other similar noisy circuits that are more efficient or are they not for that config? I know they don't have to be for the low wattage range they run in. Also, on the low power factor, that implies it's running 28-35 volts-ish, correct? (I have a soldering fan that runs .10 on 120v which tallies up with the voltage it probably is.
Depending on transformer coupling and stray inductances, as well as the Hold current specification of the SCR, it is possible that there is enough of swing back voltage to turn off the SCR and then you would have it ready for a second strike well before the next zero (crossing). The capacitor value though is quite high (220n) so probably this implementation indeed runs at 100 Hz -- in Europe -- unlike some welding arc starters. What I am familiar with, used 2 - 5 nF mica capacitors. With that and AC supply instead of the lazy bridge, you got some 15 to 30 strikes on the rising (positive going) voltage and same on the falling (negative going) slope. Instead of an SCR, the shorting action was produced by one -- or possibly two series connected -- spark gaps. The supply transformer (3 to 5 kV and for Sub Arc even more) was current limited by a magnetic shorting bar between the primary and secondary windings. Of course, your capacitor dropper is also current limiting and much, much smaller.
Do you have a Geiger counter? Because the UV from the arcing in that tube should be enough to cause some of the aluminum to transmute through K shell electron capture into an unstable isotope that decays back to aluminum. The decay will only be beta radiation (high speed electrons), and isn't really a threat. Curie exposed aluminum to UV and showed it to be radioactive for about 30 minutes afterwards.
I always thought thyristors and varistors are two different devices and maybe it shows different on caps ,but the board print states clearly 334J400V,a bit different than 220nF
The 2W10 is wired as a three pin device, so it can't be a relay or full wave rectifier. The two widest spaced pins would be the the AC input. One pair of the closely spaced pins are connected together; the others were left open. Maybe it is a 240V/120V converter of some sort? A transformer with one side of the primary connected to the secondary?
I'm curious if this mystery circuit has enough power at the high voltage side to fry bugs on a bug zapper grid. I have this rectangle shaped bug zapper named the monster zapper but monster is isn't. this thing is only as useful as a fluorescent light. It doesn't pop at all. I have a HV transformer that I'm going to try to implement into the zapper. hope for the best.
When I was much younger, I built a truly over powered electric fence module, with a EHT car coil that will do the job nicely. Needless to say, it was built, tested, and then promptly shelved in a box with the 30 odd meters of high tension cable I bought along with the other components after I saw how fat, bright, scary and long the arc was that it was putting out. I guess I never used it primarily due to the fact that I had visions of doing corpse clean up every morning and then finding places to hide the bodies. When I got hold of an electric fence meter, to try and ascertain the output of it, the meter just kept reading - - - on the screen after connecting the prongs to the arcing side, so I never did find out what the output of it was, but it was and still has the most terrifying of arcs. I will however say, that it would get rid of your bugs within a modest range of the unit 🤣🤣🤣
I've designed a circuit similar to this, but working off batteries. Which means I needed to create my own AC signal to rectify. The thyrister self-shorts out the capacitor reserve and thereby effectively switches itself off, no need to wait until the zero on the input wave. You'd need the data sheet to know what voltage triggers the thyrister but I made it work differently based upon the charged voltage, independent of that trigger voltage. Good analysis of the circuit though.
1.3k is a standard value at 5%. It's 1, 1.2, 1.3, 1.5, 1.6, 1.8, though it's one of the least commonly found (I've rarely seen 1.3 and 1.6; the others are frequent).
There are different resistor series. I use the E12 series which has 12 values per decade and jumps from 1K2 to 1K5, but other standards probably do include 1K3.
the slot for the the "2W10" could be for the relay that is omitted to make the 2 pole version, for cost cutting they probably just solder over the pins and use the same board. 8:30 , you can see the added solder nugget used to bridge @ 5:10. anyways im 15 and from Canada and a reply would be great! by far my favourite electronic dissection channel.
The input capacitor limits the current but the circuit still creates a huge momentary current spike. The components seem to handle this but I'm sure this stress doesn't help their lifespan. If they put a resistor in series with the AC input the circuit would probably be much more reliable.
If I'm not mistaken this unit could be run on 120v by shorting one of the input diodes. This would turn the diode bridge into a voltage doubler, similar to how the 115/230 switches on old PC supplies work. I think this converted circuit would have 60% the output on 115v 60Hz as the original has on 230v 50Hz.
That's the thing with most disinfectants. If it kills things, it usually just kills you slower, as you are big. It would take a while for it to have noticeable effect, but not something that you would want to test on yourself
Hi Clive I watch loads of your videos & really enjoy them. I watched your life stream for the first time yesterday. Came across it by accident. Why don't you put a link in all your videos & mention it to promote it?
If it had some kind of actual benefit, would they not be common in restaurants at the table? No? Sounds like it is bogus to me. I'm welcome to change my mind, but I just have never heard of it... And I'm at least kind of sort of familiar with all of the parts of the world that use chopsticks.
Yep. Up exactly one octave, which means 2x the frequency. The second one is about 99Hz and definitely is more of a sawtooth form than a square, sine, or triangle form of wave. The first one was about 49Hz, also a sawtooth wave form. The discrepancy between 49Hz and 50Hz may be my speakers, the video playback, or the mains frequency, etc....
The colour of the discharge inside the tube suggests what's inside is just air (but perhaps at a lower pressure). Argon should look more pink in colour, and neon more red. And I don't think it'd make sense to select another noble gas that is more similar to this in colour, as all of them are more expensive.
The effect was first seen on top of ships masts in thundery weather. Hence the corona (crown) name. Increased tubr size may simply need more turns on the high voltage winding, and possibly larger capacitors and a more powerful thyristor.
@@johndododoe1411 Ah, yeah, nice, I had to read your reply… there's that voice again, torturing me the whole day again… "Gonna be your man in motion, all I need's this pair of wheels. Take me where my future's lyin', St. Elmo's fire…"
Since we are making UV, and I am not seeing a mercury vapor type glow, my guess would be the tube has deuterium gas in it. So inexpensive deuterium light source?
You didn't discuss the version with the relay. curious. AND just were is the Ozone produced? Certainly, not inside the tube. Maybe I missed the cross-sectional drawing of the gas tube. Is the Al-U-minem mesh outside in air so that is where the discharge creates Ozone? OK, maybe that was obvious.
The 2W10 is a 2A 1000V bridge rectifier in the round epoxy case, similar to the 1.5A W04s I have a bag of somewhere. Long leads. They used to use them in hair dryers (maybe still do). So an alternative to stuffing the four '4007 rectifiers.
@@bigclivedotcom no Clive, it was a very short video you released on 14th March where you were on one side and someone else was working on the other side and it burst into flames. I think was one of those all in one generators.
@@MrRobbiegem2005 Ah the Lithium power wall video. That wasn't me in that video. That's all the footage there is. A screw accidentally went through a cell.
Why is the arc happening inside a sealed glass tube? Wouldn't it generate more ozone by having the arc conduct through the air? Use a tube like this, but have it open to the air, even if just a bit, should generate much more ozone. Maybe the gas discharge tube is meant to produce UV?
designed and built these commercially from about 1990 up to 2004. The lowest power one I had worked on a similar principle except it was 1/2 wave and fired when the capacitor stopped charging. Biggest one was in a watercooled stainless tube 2 m high, ran on pure oxygen. Drew about 3 KW from the mains. You could not run it with people in the room! It was used for purifying water for a fish farm. I just sis the electronics.
2:18 "It does create ozone". If it does create ozone, patent this device and you will be a billionaire this year. Currently used ozone generators require oxygen tanks, and they are much more complicated than the device on your table. Usually, such a simple device that you purchased on eBay generate nitric oxide, but yours generate ozone instead! This is pretty amazing!
In open air a corona discharge unit will create ozone, nitric oxide, hydroxyls and other molecules. The exact same ones created in nature in a similar way.
The diode layout looks like it's doing a few things. It must be changing AC to DC so we don't electrocute our consumers, and it also looks like at least part of cascading voltage circuit going into the coil, maybe 1/2? I may have to buy one of these things just to play with it a bit. Cool little device! Interesting video. Thanks!
The circuit look quite similar to old day spark gap transmitter.. the SCR act like a spark gap when the voltage exceed the break down it start to conduct . the capacitor dropper act as current limiting circuit instead of choke.
1k3 first appears in the E24 resistor value range. It sounds like your collection is E12. SMD resistors are so cheap these days that most people pick from E96, particularly when making measurement circuits. This circuit probably uses the closest value with a 5% tolerance to keep cost down.
The empty spot is just for the relay on the 4wire version, isn't it? EDIT: Actually nah, they're different boards rather than just reused boards. 2w10 is the parts code for a bridge rectifier but the hole pattern is weird there....no idea :/ It does look like a relay hole pattern so maybe it's for a different version of the 4 wire or something
1.3K: For a four color band resistor that would be Brown, Orange, and Red and then a tolerance band. Standard in E24, E96 and E192. Probably not going to find it on the shelf in any tolerance other than Gold 5%.
For 110vac, put two capacitors in series on the +/- of the bridge rectifier and move the neutral wire to the center tap of the two added capacitors. Basic voltage doubler.
in regards to the empty space with the 6 holes at 8.34, it reminds me op the spacing for the pins of a small pcb transformer. though searching for 2w10 comes up with a bridge rectifier
Looks like the only tracked connection to that "2W10" position are where the red and black wires attach, so it might be for some kind of filter. Oddly, 2W10 is a part number for a 1000V 2A bridge rectifier but it wouldn't fit that hole pattern. Maybe they put that on the PCB to say "We wanted to use a 2W10 rectifier but the boss had a load of 1N4007s in stock and made us use those instead".
Hey, I've been wondering if it's possible to make a cheap LED bulb into a non flickering lamp. I have a lot of good LED bulbs laying around and since I live in Brazil, recording illumination is not cheap at all. This mod would make these led lamps actually viable for recording and it would be great.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
wearing decent over the ear headphones and the first time you powered on the first device my teeth started vibrating. that was quite the sensation hearing that little thing run.
Mine too lol.
Yaa, that was annoying..
Might be even more interesting with bone conduction headsets like Aftershockz. High pitch tones were a mixed bag with those, some were excruciatingly painful. Like nails into your temples kind of sensation. Other high pitch tones it took the edge off so much they sounded smooth instead of spikey.
Turn your headphones down.
Any fillings loosen ?
Another high voltage device for Clive to caress with his bare hands whilst switched on.
Some high voltage devices have all the luck....
@@zombieregime Lol :-)
You mean bear hands
I think you meant Mehdi from ElectroBoom, he cant keep his hands off the mains or high voltage 🤣
He's a trained professional :-)
Big Clive, I do like when you highlight the features of the design related to electrical safety: gaps in the PCB in order to get long enough creepage, proper bonding of PE to a conductive case, identifications of the insulation barriers when double insulation is required, when the designer went for double insulation instead of relaying on PE/RCD, need for a tool when a potentially live part could be touched, ...
I feel I benefit when attention is brought, even briefly, to the practical design strategies which guarantee electrical safety.
This device is useful if you don't want that your neighbors listen the radio
@@davidmoore7257 You have your a c and n certifications don't you, little bugger 😂
@@choppertimberland139 what did he say
@@youtubeistyrannical1787 I forget but it was a lame attempt at digital humor
Sellers in China are very adept at the keyword spamming game. They'll throw in as many as they can, no matter how little they apply.
What's worse are the Chinese sellers that ship via an office in the UK, so the seller location is listed as the UK, but you still have the shipping time from China, cus they're not selling from stock in the UK. The UK address is just a front. It's just a place they forward the parcels from China from. Slowly, but surely, they're taking over EBAY. And people usually can't spot from the photo and listing details, that the product is garbage.
It must also generate a ton of RF interference. Perfect to prevent your neighbors from watching DVB TV or listening to the radio. Did you check on that Clive ?
Excellent point. Our fave Manxman needs to get himself a spectrum analyzer, or at least gin up some LED indicator circuit that monitors the AGC level on an AM radio.
Might as well put an antenna on the output just to see how far the noise can travel. (AM band at nighttime, probably detectable ½ way around the world.)
It's interesting that the circuit is quite different between the 2 wire and the 4 wire version. you would have thought they would have used the same 4 wire PCB but just omitted the relay and associated components.
I think they slimmed the circuitry down in the 4-wire version to fit the relay in.
FWIW 1.3 is a standard value in the E24 series
Thank you, it just took 52 years for someone to mention the E-series for me to go find out what it is. Found the article on Wikipedia. I get it.
I was going to say, I had a pack of E series and that came as a value.
Edit: just looked in it, it came with 5, I've used 1. Kit of some 800 E24 1%'ers
@@SupernovaSpence 5% E24 you can bet that some are marked differently and yet are the same measured resistance, or the higher marked can actually be lower in resistance. Only way you get a 5% E24 range is because they are the outliers from selecting the 2% parts out.
Yep. 1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.7, 3.0, 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1 ... 24 values.
Most people don't know how it is calculated either: for N = 0-23 (24 values total), it's 10^(N/24). The E96 values are similarly calculated.
@@demef758 the formula gives a good approximation but it's off in the middle of the range (in the E12 series it would calculate 2.6, 3.2, 3.8, 4.6 instead of 2.7, 3.3, 3.9, 4.7). I've graduated in electronics engineering in 1994 and never seen the formula, but I can still recite the E12 series even if you wake me up in the middle of the night 😄
When the “low voltage“ side is mains...
Oh for the good old days of colour TV with vacuum tubes and CRTs. On 25 inch colour TVS, the CRTS were fed as high as 40Kv via large flyback transformers. I cut my electronics teeth on repairing them or doing weird things with them (one time I built a radio telescope out of one). While the current is generally too low to actually injure you, contacting it could provoke some pretty spectacular muscle reactions. A buddy repairing the family TV (live of course if you need to adjust something) had his father come to the door and say "how's it going?". Paul was startled and contacted the 40Kv, and the screwdriver he was holding magically disappeared from his hand and then reappeared punched all the way through the doorframe inches from his dad's head. His dad learned to avoid possibly startling him if he power is on, and we both learned to be a bit more careful around CRTs. Even with the power off, always discharge it safely. A 25" CRT is a pretty good capacitor.
My University physics TA (in a custom 8 bit microprocessor course the two of us "invented") was truly evil. He had this habit of sneaking up behind us while the power was on (often an open chassis with 120V mains transformers in the DIY linear power supplies and many live points) and slapping a wooden yardstick down HARD on the heavy composite lab tables we worked on right beside us. Sounded like a gunshot. EVERY FLINKING TIME we had a heart attack and chased the TA back into his office which he locked, while he was giggling his head off.
@@fromagefrizzbizz9377 I want that TV which enables the ninja throwing skills and reflexes. I'm sure the aim can be improved with practice.
@@fromagefrizzbizz9377 It is possible with practice to learn how to clap one's hands together to make a sharp snap that sounds just like a high voltage DC discharge. I will not admit to having done this trick while the DEC repair guy had his hands inside the PDP-11/40. No one was injured, not even the PDP-11.
@@amazing7633 Ah yes, PDP-11's, the first computers I ever really loved - well, except for the 8 bit micro I built myself with the colossal memory capacity of 256 bytes. Oh the stories we could tell about them. The time the PDP-11's processor board decided to go the wrong way on a branch instruction, and the techie insisted we were nuts. Or how the arrangement of wires on the backplane caused the computer to crash on a specific sequence of instructions.
This is worth getting just for the discharge tube. I would like to see how it reacts to high power RF or Tesla coil discharge.
I'm wondering if it could be used as a geiger tube, biased with a high enough voltage to arc over when radiation passes throught it...
I wonder how one of those kw boost converters would work with this, powered by a 9V battery...
@@dj1NM3 that’s a genius idea. I’d bet it would work. May not be accurate but would at least give you a idea of how much radiation is present
@@dj1NM3 So you want to create large sparks around a flammable gas. I smell a bad idea.
Cop: "Maam can u explain these items in your possession"
Me: " Not without a UA-cam video refresher"
Underrated comment right there 🤣🤣🤣
get your hands where i can see, dont make any sudden moves...
"KEEP YOUR HANDS UP!!!...."(*Gunfire)..."POP...POP....POP"
@@BigHeavyB big protests and civil disobedience follows...
Wonderful stuff as usual Clive, thanks for the explanation on the rectifier.
Here I was looking all over for a "chopstick sanitizer" and couldn't find one anywhere!! Silly me, I never thought to do a keyword search on "Universal Ozone Generator Negative Ion Sterilization"... duh, so obvious now!! Thanks for that, now all my chopsticks are germ-free!! 😋
It's bedtime at the end of a very long week. I open UA-camr for my evening prayer and see this stinkin' _CliVideo_ with all the elements: eBay, mystery, cheap plastic box, *high voltage!* Heaven can wait 11 more minutes, I guess...
Yaaaaay, I've been waiting for this version to be disintegrated as well!
It's always difficult figuring out exactly what happens in rectifier circuits but I think that this circuit is cleverer than it looks. I think that the thyristor fires twice in each half cycle and pulses the transformer at 200 Hz. In other words it charges and discharges the output capacitor once on the way up and once again on the way down.
The thyristor doesn't conduct for 2/3rds of the half cycle as shown by Clive because the current falls to zero at the top of the sine wave and so the thyristor turns off. The capacitor then recharges through the other half of the bridge rectifier as the voltage falls towards zero and the thyristor triggers again when it reaches about 100V.
No, no, you were right the first time. Its aluminium now. IIRC, at a symposia a while back the issue of multiple names for elements was being addressed. And in exchange for some elements being officially named the way we name them we gave up aluminum for aluminium.
Christopher Niobus will be spinning in his grave.
:)
Aluminium was always aluminium.
I appreciate the follow-up for us split-phase types.
At 110-120V my rectal-number-generator pulls out a 180k substitution for the thyristor trigger divider as the closest E12-series or a 200k if you feel like stocking E24.
Not likely that I'll order one just to test and I don't want to root out any mean squares tonight.
Clive, would you ever considered building the more efficient circuit and demonstrating with the tube connected? Let's see what it sounds like?
I wonder how worried Clive's postal carrier is when he's delivering packages from the Far East.
I would imagine they are more worried about the explosive aspect than the Covid aspect
@@sofa-lofa4241 that is what thought too, especially since they'd be unlikely to read Chinese
I suspect ignorance is bliss, unless the mailman knows his/her customers.
I have ordered 8 seperate packages of an illegal device from China from separate sources- only one got snagged by customs. The others delivered just fine.
@@kirkjohnson9353 ಠ_ಠ
High speed drum printers used to have a power supply for a neon light that would go to thing the length of the paper width. The thing had a sharp pin every inch and when the paper passed over it it would ionize the air and paper, i.e., make it conductive and it would allow the paper to fall into its basket rather than stick to the wall or the ceiling because of static cling. The printers printed so many lines a minute but they also had a slew rate between printed lines that was a lot faster. Some forms like stock certificates and checks only have two lines printed on a sheet so this was particularly necessary in dry climates.
Those tubes would be awesome in 18-24 inch lengths.
The neon FX industry can make similar tubes to order, but at great expense.
@@bigclivedotcom Going to guess the tube is merely a glass tube and the fill gas is air, using a dual stage vacuum pump down and then seal, so that it can easily be ionised. Steel rod with nickel plate for the inner electrode, because that is cheap and shiny, and you can get a semi good metal to glass seal on it as well, plus just a quick bit of sanding on the outside through the plate and it is sort of solderable.
That 2W10 outline almost looks like it'd be a common mode choke, however not wired to pass both active and neutral. Potentially just an inductor in that little common mode choke/transformer form factor. The two pins on the "input" side and the 4 on the "output" side feels like a transformer form factor to me.
Not particularly sure what purpose an inductor there would have, perhaps just to help with the current spikes?
I think my partner got one of these, I hear that same sound coming from our bedroom of a night while I'm studying in the sunroom. He's turned it on nearly every night this week too so it must be working.
Its definitely a violet wand then.
_Who Framed Roger _*_Rabbit_* comes to mind...
🐰
😆🤣🤣👍🏼
It's nice to see the Chinese finally do their bit for the Ozone layer.
I imagine one nano fart is the product of one ant. A decent colony may produce a whole one to five farts.
10 times bigger than a pico fart
You know how the Borg always seemed to use plasma discs in their alcoves for arcy-sparky effects? This thing would be useful as a Borg implant, though where it is inserted would be up to your imagination... :P
I was just thinking that you could use one of those tubes in a scale model Borg diorama of a Borg alcove.
Perhaps it was just the robotic way Borg spoke - they've been saying ASS-imilated all along and nobody ever knew!
DC Voltage - "Like triple boobies" Big Clive, 3/17/2021
I came searching for this comment :)
Ouch!! As a ham radio geek I'm just wincing at the RFI they must put out. Is static damage possible to components in vicinity?
I'm not sure how much a voltage gradient it creates.
The is a pretty strong electric field near the box. You should be able to light up a neon bulb 6 inches (15 cm) away. When I worked on ozone generators, we complied with CISPR 14 for EMI/EMC. The problems for emmisions were near-field E field and conducted noise on the power cord.
Aaah the mesh is outside of the tube. The first time you showed this i thought it was inside.
I have a dumb question. If the sparks are inside the tube how does it make ozone?
The just couple the current evenly to the inside surface of the glass. Then it capacitively couples to the outer mesh, causing a corona discharge around it.
@@bigclivedotcom I'll have to simply agree. My hed hurts
Think plasma ball, it jumps off the glass to your finger.
I learned a lot from this. Especially how these led nightlight power supply and phone chargers work. I always wondered how they worked without a transformer.
I haven't got a clue what he's taking about but I still watch the videos...strange but true 🤔
I have only the faintest idea, but I find the videos calming. I can relate!
Wonder how long the plastic housing might last? Ozone's pretty aggressive, and can really wreck even nitrile rubber o-rings over time. Silicone o-rings seem slightly more durable.
Rubber is very susceptible to ozone damage.
Ohh... dig the mystery 😉 Always entertaining AND educational.
You must have the most sanitized house on the Island big Clive.
Lol, 220 nano FART capacitor.
Thanks Clive for referencing the previous closed caption badness
Those are much more efficient than most of the mega-fart style, especially run on 220/240vac!
I thought I heard him say that so I listened 3 times and yep. That what I heard
Good thing there's ozone to take the smell away
Despite what you say Clive about that the circuitry could be more efficient, I really think this is a neat simple design with one thyristor (SCR). One problem with a thyristor is the way to stop it conducting once the gate voltage is gone: OR in the first place you never exceed the A-C current above the hold current of the SCR, OR when used above the hold current (in this case) you make the A-C current manually zero. In this device they've used the reversed emf on the coil to stop the current.
Thanks for explaining the inverter ☺️
Thank you for exploring into the 120V side of things, Clive!
These are interesting, but I think they would not like my radios. LOL
This is a 220V device that outputs higher voltage to the discharge tube.
@@johndododoe1411 I think the 120VAC version would be the same, just change the resistor ratio slightly. The thing to make the high voltage there is dV/dt, the speed of the turn on of the thyristor, so the secondary circuit can generate the fast rise time pulse. So long as the capacitor on the primary side has enough charge the limiting factor is the tube strike voltage, which is a lot lower than the open circuit voltage the transformer can produce, though that also is limited by internal arcing through the distributed secondary.
I just have a quick question for you.
I am quite a noob about electronics and there is something that I never quite understood about capacitors. What is preventing them to discharge into the "charging part" of the circuit instead of the part that you want to dump that high voltage into? My only guess is that you can use diodes to prevent the electricity to flow back into it but are they strong enough to not get fried by all this high voltage? Or maybe there something else that I am missing?
@@Reth_Hard I can see the confusion, but to understand you have to look at the circuit. For example a smoothing capacitor after a bridge rectifier does not feed back through the rectifier (because it IS a set of diodes that rectify the voltage) but instead sustains the voltage during the altering voltage trough. That's a parallel application.
A dropper diode is a series application and that's a little harder to visualise. If someone could explain it to me I'd really appreciate it, but I've always imagined it as a charge pump. The -ive side of the capacitor is actually +ive wrt ground but the capacitor will only "conduct" as much energy as its specifications allow - which is why dropper caps are usually rated in (a few hundred) nanoFarts. That "energy" will result in mains voltage if you measure it with no load, but under load a much more friendly voltage will usually result. That's why Clive and everyone else is a bit suspect about dropper capacitors in the wrong application. A component malfunction could result in mains voltage where you don't expect it, or a wrong polarity could put the device case/earth at mains potential as we've seen in a few videos.
A third application is as an R/C (resistor/capacitor) filter. It's a series application with a resistor (that's the filter part) but it is in parallel with the signal. That means it dumps resonant frequencies to ground/-ive.
I also think that I'm a lousy electronics teacher, and this probably hasn't helped you in the slightest LOL
@@Chris_the_Muso
Thank you anyway... :P
To be honest I forgot that capacitors were often used for filtering curent and were just assuming the one we see in the video was used for pulsing current into the mesh thing. I'd like to learn just enough about electronics so I can repair some of my stuff when it's possible instead of dumping it in the garbage. I feel like it would be better for my wallet and the environment.
Where did the extra wires go on the other one
They were part of what appeared to be a latching relay circuit. Possibly as a safety shut off for a UVC lamp.
Isn't the "2W10" just the spot for the relay that exists on the 4 wire version? PCB looks the same.
Congrats again on 750k+ subs. Been watching since way back.
0:35 "For sterilising chopsticks"
That's curious, as if i'm not mistaken in mainland China chopsticks used in restaurants are most likely to be made out of melamine (or plastic in general). Wouldn't sterilising in this way degrade the material over time.
It actually would make more sense in Korea where metal chopsticks are most common.
Some of the listings mention chopsticks. I'm not sure the material they use. I prefer wooden chopsticks for the extra grip.
Haven't spent much time in mainland China to informedly comment as well. Wooden non-disposable ones are probably preferred everywhere for home use, but not well suited for public establishments (for that, in Japan, there are disposable wooden ones, but that's wasteful as opposed to Korean metal, and Chinese plastic).
Clive, a little question, where do you get your electronic supplies? (I'm from Europe and i need a specific micro button)
Rapid electronics, CPC and eBay.
@@bigclivedotcom thanks ^^
That empty square space on the PCB is where the 4 wire version has it's relay.
Thanks for the extra effort for the 110v test.
I'd bet most of the wattage of that circuit is the thyristor shunting, rather than discharging to pulse the coils. Do you know about other similar noisy circuits that are more efficient or are they not for that config? I know they don't have to be for the low wattage range they run in.
Also, on the low power factor, that implies it's running 28-35 volts-ish, correct? (I have a soldering fan that runs .10 on 120v which tallies up with the voltage it probably is.
In this case I think the power factor is due to the odd current waveform of charging the other capacitor.
“Aloominum”
Doo-do-be-doo-doo
“Al-youminyum”
Do-doo-doo-do...
I would love to see some different uses and a closer look at that tube.. very sparkly,, very cool
Depending on transformer coupling and stray inductances, as well as the Hold current specification of the SCR, it is possible that there is enough of swing back voltage to turn off the SCR and then you would have it ready for a second strike well before the next zero (crossing). The capacitor value though is quite high (220n) so probably this implementation indeed runs at 100 Hz -- in Europe -- unlike some welding arc starters. What I am familiar with, used 2 - 5 nF mica capacitors. With that and AC supply instead of the lazy bridge, you got some 15 to 30 strikes on the rising (positive going) voltage and same on the falling (negative going) slope. Instead of an SCR, the shorting action was produced by one -- or possibly two series connected -- spark gaps. The supply transformer (3 to 5 kV and for Sub Arc even more) was current limited by a magnetic shorting bar between the primary and secondary windings. Of course, your capacitor dropper is also current limiting and much, much smaller.
Do you have a Geiger counter?
Because the UV from the arcing in that tube should be enough to cause some of the aluminum to transmute through K shell electron capture into an unstable isotope that decays back to aluminum. The decay will only be beta radiation (high speed electrons), and isn't really a threat.
Curie exposed aluminum to UV and showed it to be radioactive for about 30 minutes afterwards.
I always thought thyristors and varistors are two different devices and maybe it shows different on caps ,but the board print states clearly 334J400V,a bit different than 220nF
The 2W10 is wired as a three pin device, so it can't be a relay or full wave rectifier. The two widest spaced pins would be the the AC input. One pair of the closely spaced pins are connected together; the others were left open. Maybe it is a 240V/120V converter of some sort? A transformer with one side of the primary connected to the secondary?
2:02 wow that sound through my headphones made my whole head vibrate like crazy.
I'm curious if this mystery circuit has enough power at the high voltage side to fry bugs on a bug zapper grid. I have this rectangle shaped bug zapper named the monster zapper but monster is isn't. this thing is only as useful as a fluorescent light. It doesn't pop at all. I have a HV transformer that I'm going to try to implement into the zapper. hope for the best.
When I was much younger, I built a truly over powered electric fence module, with a EHT car coil that will do the job nicely.
Needless to say, it was built, tested, and then promptly shelved in a box with the 30 odd meters of high tension cable I bought along with the other components after I saw how fat, bright, scary and long the arc was that it was putting out.
I guess I never used it primarily due to the fact that I had visions of doing corpse clean up every morning and then finding places to hide the bodies.
When I got hold of an electric fence meter, to try and ascertain the output of it, the meter just kept reading - - - on the screen after connecting the prongs to the arcing side, so I never did find out what the output of it was, but it was and still has the most terrifying of arcs.
I will however say, that it would get rid of your bugs within a modest range of the unit 🤣🤣🤣
@@-Gadget- might pop the circuit breaker too. That might be overkill for my zapper.
I've designed a circuit similar to this, but working off batteries. Which means I needed to create my own AC signal to rectify. The thyrister self-shorts out the capacitor reserve and thereby effectively switches itself off, no need to wait until the zero on the input wave. You'd need the data sheet to know what voltage triggers the thyrister but I made it work differently based upon the charged voltage, independent of that trigger voltage. Good analysis of the circuit though.
I’m a bit confused- isn’t 2W10 populated by something (wasn’t a relay mentioned?) on the other device?
It doesn't really have a pinout I'd associate with a relay.
Again brilliant Clive. I love your stuff mate.
Bob
1.3k is a standard value at 5%. It's 1, 1.2, 1.3, 1.5, 1.6, 1.8, though it's one of the least commonly found (I've rarely seen 1.3 and 1.6; the others are frequent).
8:30 A "2W10" is a bridge rectifier and would fit into the 4-square hole pattern.
congrats on passing 750k, clive
Clive. What did you mean when you stated that 1K3 was "not a standard value"?
There are different resistor series. I use the E12 series which has 12 values per decade and jumps from 1K2 to 1K5, but other standards probably do include 1K3.
@@bigclivedotcom Obviously, I'm not up with this new (odd) labeling format.
the slot for the the "2W10" could be for the relay that is omitted to make the 2 pole version, for cost cutting they probably just solder over the pins and use the same board. 8:30 , you can see the added solder nugget used to bridge @ 5:10. anyways im 15 and from Canada and a reply would be great! by far my favourite electronic dissection channel.
Seems like turning the scr on would short the bridge out and explode the diodes or the scr. Maybe the input cap prevents that from happening??
Yes, the capacitor on the input limits the current.
The input capacitor limits the current but the circuit still creates a huge momentary current spike. The components seem to handle this but I'm sure this stress doesn't help their lifespan. If they put a resistor in series with the AC input the circuit would probably be much more reliable.
It would make more sense if the output of the bridge were moved to the other end of the primary so both caps would discharge through the transformer.
Good luck finding 2W-10 oil for that circuit board!
If I'm not mistaken this unit could be run on 120v by shorting one of the input diodes. This would turn the diode bridge into a voltage doubler, similar to how the 115/230 switches on old PC supplies work. I think this converted circuit would have 60% the output on 115v 60Hz as the original has on 230v 50Hz.
Messing with the oxygen molecules in the room and making them highly reactive sounds like a scary thing to be exposed for for our lungs.
That's the thing with most disinfectants. If it kills things, it usually just kills you slower, as you are big. It would take a while for it to have noticeable effect, but not something that you would want to test on yourself
It's also something used in auto detailing to remove stagnant smells. You just have the smell of ozone afterwards.
Nothing that doesn't exist in nature. If anything, the lack of those elements in home air may contribute to issues like mold.
Short tem exposure to ozone isn't that bad
@@MandrakeFernflower It is if your hit by lightning .
Hi Clive I watch loads of your videos & really enjoy them. I watched your life stream for the first time yesterday. Came across it by accident. Why don't you put a link in all your videos & mention it to promote it?
I probably should. But even at 1500 regular viewers during the stream it is a struggle to keep up with chat.
@@bigclivedotcom That what you get for being famous!
The "chopstick sterilizer" aspect sounds like "Ancient Chinese Medicine" meets "Modern Quackery".
Except it actually kills basic germs on in the sanitation chamber. Not much quackery.
@@johndododoe1411 but are dirty chopsticks an actual real world issue? Probably not.
@@ncot_tech Yes, particularly on those that people carry around in their pockets/bags.
If it had some kind of actual benefit, would they not be common in restaurants at the table? No?
Sounds like it is bogus to me. I'm welcome to change my mind, but I just have never heard of it... And I'm at least kind of sort of familiar with all of the parts of the world that use chopsticks.
@@spokehedz The washing up doesn't happen at the table. This is part of washing the dishes.
Yep. Up exactly one octave, which means 2x the frequency. The second one is about 99Hz and definitely is more of a sawtooth form than a square, sine, or triangle form of wave. The first one was about 49Hz, also a sawtooth wave form. The discrepancy between 49Hz and 50Hz may be my speakers, the video playback, or the mains frequency, etc....
The colour of the discharge inside the tube suggests what's inside is just air (but perhaps at a lower pressure). Argon should look more pink in colour, and neon more red. And I don't think it'd make sense to select another noble gas that is more similar to this in colour, as all of them are more expensive.
It produced at peak at around 500nm.
If you wanted that light effect for a larger prop, how would you go about doing it?
The effect was first seen on top of ships masts in thundery weather. Hence the corona (crown) name. Increased tubr size may simply need more turns on the high voltage winding, and possibly larger capacitors and a more powerful thyristor.
@@johndododoe1411 Ah, yeah, nice, I had to read your reply… there's that voice again, torturing me the whole day again…
"Gonna be your man in motion, all I need's this pair of wheels.
Take me where my future's lyin', St. Elmo's fire…"
Traditionally with a crackle tube. A neon tube filled with chunks of glass tube.
Since we are making UV, and I am not seeing a mercury vapor type glow, my guess would be the tube has deuterium gas in it. So inexpensive deuterium light source?
I wonder why such a difference in driving controls and is the relay version the one driving the lamp harder?
Probably to save space in the relay version.
@@bigclivedotcom Right. Cheers sir.
The delightful smell of Ozone. It's the wonderful aroma of a near by lightning strike.
The MCU's new fragrance, Eau de Thor.
SpotOn
You didn't discuss the version with the relay. curious. AND just were is the Ozone produced? Certainly, not inside the tube. Maybe I missed the cross-sectional drawing of the gas tube.
Is the Al-U-minem mesh outside in air so that is where the discharge creates Ozone? OK, maybe that was obvious.
Yes. Corona discharge on the outside. I took the four wire version apart in another video.
The 2W10 is a 2A 1000V bridge rectifier in the round epoxy case, similar to the 1.5A W04s I have a bag of somewhere. Long leads. They used to use them in hair dryers (maybe still do). So an alternative to stuffing the four '4007 rectifiers.
Clive; would you have an update on the inverter/generator that you and your buddy set fire to last week? I would love to see the full video.......
Which video was that? Is it something I mentioned or another channels incident?
@@bigclivedotcom no Clive, it was a very short video you released on 14th March where you were on one side and someone else was working on the other side and it burst into flames. I think was one of those all in one generators.
@@MrRobbiegem2005 Ah the Lithium power wall video. That wasn't me in that video.
That's all the footage there is. A screw accidentally went through a cell.
Why is the arc happening inside a sealed glass tube? Wouldn't it generate more ozone by having the arc conduct through the air? Use a tube like this, but have it open to the air, even if just a bit, should generate much more ozone. Maybe the gas discharge tube is meant to produce UV?
The coupled current causes a Corona discharge on the outside.
@@bigclivedotcom OK, thanks.
designed and built these commercially from about 1990 up to 2004. The lowest power one I had worked on a similar principle except it was 1/2 wave and fired when the capacitor stopped charging. Biggest one was in a watercooled stainless tube 2 m high, ran on pure oxygen. Drew about 3 KW from the mains. You could not run it with people in the room! It was used for purifying water for a fish farm. I just sis the electronics.
Isn't the area marked 2w10 the location of the interlock relay on the other device? The footprint looks like a relay too.
2:18 "It does create ozone". If it does create ozone, patent this device and you will be a billionaire this year. Currently used ozone generators require oxygen tanks, and they are much more complicated than the device on your table. Usually, such a simple device that you purchased on eBay generate nitric oxide, but yours generate ozone instead! This is pretty amazing!
In open air a corona discharge unit will create ozone, nitric oxide, hydroxyls and other molecules. The exact same ones created in nature in a similar way.
The diode layout looks like it's doing a few things. It must be changing AC to DC so we don't electrocute our consumers, and it also looks like at least part of cascading voltage circuit going into the coil, maybe 1/2? I may have to buy one of these things just to play with it a bit. Cool little device! Interesting video. Thanks!
thanks for that Clive electrode up the middle ! and all diodes point to positive will help me a lot
The circuit look quite similar to old day spark gap transmitter.. the SCR act like a spark gap when the voltage exceed the break down it start to conduct . the capacitor dropper act as current limiting circuit instead of choke.
1k3 first appears in the E24 resistor value range. It sounds like your collection is E12.
SMD resistors are so cheap these days that most people pick from E96, particularly when making measurement circuits.
This circuit probably uses the closest value with a 5% tolerance to keep cost down.
How do we tell the difference between the burglar alarm and the fire bell?
The empty spot is just for the relay on the 4wire version, isn't it?
EDIT: Actually nah, they're different boards rather than just reused boards. 2w10 is the parts code for a bridge rectifier but the hole pattern is weird there....no idea :/
It does look like a relay hole pattern so maybe it's for a different version of the 4 wire or something
1.3K: For a four color band resistor that would be Brown, Orange, and Red and then a tolerance band. Standard in E24, E96 and E192. Probably not going to find it on the shelf in any tolerance other than Gold 5%.
That coil is the same type or one used in heaters electronic spark ignition box...
Im
wondering if i placed a car ignition coil there it should make sparks arcing across a gap??
For 110vac, put two capacitors in series on the +/- of the bridge rectifier and move the neutral wire to the center tap of the two added capacitors. Basic voltage doubler.
I believe that 1K3 is on the E24 range of standard resistor values. Please feel free to correct me if I am wrong ;)
in regards to the empty space with the 6 holes at 8.34, it reminds me op the spacing for the pins of a small pcb transformer. though searching for 2w10 comes up with a bridge rectifier
Looks like the only tracked connection to that "2W10" position are where the red and black wires attach, so it might be for some kind of filter. Oddly, 2W10 is a part number for a 1000V 2A bridge rectifier but it wouldn't fit that hole pattern. Maybe they put that on the PCB to say "We wanted to use a 2W10 rectifier but the boss had a load of 1N4007s in stock and made us use those instead".
Last time I was this early there was no eBay
It's still out !!
the sound at 2:05 gave me a poprock feeling in my mouth.
Hey, I've been wondering if it's possible to make a cheap LED bulb into a non flickering lamp. I have a lot of good LED bulbs laying around and since I live in Brazil, recording illumination is not cheap at all. This mod would make these led lamps actually viable for recording and it would be great.
Some lamps can be hacked to reduce their ripple.
Could add a voltage doubler perhaps if you wanted to run it from 110v mains.