greenhorn

A few things about those UV tubes:

I have very similar LED tubes that I bought at a regular shop here in Austria. It's very likely that they are sourced from the same company in China. My version even runs on 220 V, so I guess it's more "fun".
Those power cords that you got (connector on one end, stripped wires on the other) also came with the tubes I bought. Those are needed if you want to hard-wire those tubes somehow. If you want to daisy chain several tubes together, there are specific connector cables with plugs on both ends. There are also end caps that should have come with the tubes you bought to cover the otherwise exposed mains voltage pins at the other side of the tube.
What's also interesting is that the tubes in the video don't have any earth connection even though the connector could support it. My version does have a working earth connection.

I had another look at this and found this article from 2020 link . If I understood that correctly, even by then, this researcher who seems to have invented this concept talks about replacing the insulator needed in transistors with a specially processed cellulose-based material. Since traditionally this insulator needs silicon (consists of SiO2 if I remember correctly), replacing it with this new material saves ressources (silicon) and avoids the creation of nasty by-products of the production process.

One of these by-products is sulfur hexafluoride (SF6), which is one of the most potent greenhouse gasses. As far as I know, if you should require SF6 in a lab, the mandatory containment procedures are quite extensive.

In this article, it is also mentioned that those "paper transistors" are not likely to replace conventional transistors in any high-performance devices soon. I don't think those transistors could have that much power because of the generated heat. This would also mean that they will not be able to sustain high clock speeds, since those require fast switching which in turn is responsible for the power consumption and generates the heat. Of course there are still many applications for this technology. If those transistors are truly bio-degradeable as claimed, then it could reduce the environmental impact of all those low-power consumer devices that don't need too much computational power.

I also wonder how these devices handle changing environmental factors, especially humidity.

I have seen many interesting ideas presented by scientists over the years, but so many turned out not to be practical, which is totally normal. For every breakthrough there are tons of failures, but that's how we learn and continuously improve.

2 minutes ago, Dutch_Master said:

There's nothing mechanical about it, it's either a capacitor or inductor (capacitor for inductive loads, inductor for capacitive loads)

I know, just an expression. I am aware that it is usually a capacitor or capacitor bank in most cases. I have also seen such a thing in combination with LC filters on one PCB.

49 minutes ago, Chiyawa said:

Although, I wish that this load balancer will be a thing because we can balance out the phases so we can minimised the chances of overloading a phase, but I guess that in theory this is hard to achieve. As electricity tariff gets more and more expensive, waste is pretty much an issue if we couldn't minimised it.

Since you will know the data of your more power-hungry devices, you can look at their rated power and derive their current draw. Also keep in mind that some devices can have very large inrush currents (which sometimes can trip a breaker, so make sure the proper type of breaker is installed). What you could do is to ask the electrician to install current monitors for each phase so you know how close you are to overloading a phase.
Depending on the needed current rating, there should be resettable circuit breakers available. This makes sure that the downtime is minimized in case a breaker trips. I'm not sure how far "up" the resettable ones get in terms of nominal current.

4 hours ago, Chiyawa said:

Indeed. But that means I might have to rewire everything which will add more cost. But thanks anyway. I thought if we have like a device which take 3 phase and then convert to a single phase, then we don't really have to do a lot of wiring.

In theory, this is possible, but not worth it (due to cost and power losses). You also have to take into account that those devices usually need a lot of power, which means that a single phase circuit would need to handle a lot of current.
If you have to rewire everything, keep in mind that there might be several ways of doing that depending on what the electrical code in your country specifies. Since this is a workshop, you could think about installing wall-mounted or ceiling-mounted conduits for the wires, which should be easier and less expensive than running everything inside the walls.

Ok, that is quite a large setup. I think the best thing would be to get an electrician who then designs the layout of your electrical system and also determines what kind of connection you need from your energy supplier. Given the type and amount of devices you have/want to have, 3 phase power definitively makes sense from a physics point of view and is probably even mandatory for the expected power draw.
One thing to consider will also be which devices will/can be active at the same time, because that influences the peak power consumption the system has to be designed for.

As @suedseefruchtalready said, load balancing can be done, but this only really makes sense at a much larger scale. At a home/small company/workshop level, the "balancing" is usually done in a static way by the electrician who should determine which single-phase circuit to attach to which phase so that it becomes less likely that one will blow the fuse of a single phase while still drawing reasonable amounts of current/power.
You will also find that more power-hungry devices tend to need a 3-phase connection themselves. In that case, you can hope the device's manufacturer has done some internal balancing inside of that device.

Since you are talking about kVAr, I am wondering if the thing you are actually more concerned about is the power factor. Devices with a bad power factor can be a problem (usually from the workshop-level of power consumption upwards), but in many cases the device manufacturer uses a power factor correction mechanism to minimize that problem.

It would be helpful if you could describe your setup a bit more (number and type of device, current/voltage rating, power factor, type of mains supply with max allowed current draw per phase) in order for us to figure out what advice we can give you.

On 2/3/2022 at 6:41 PM, ricohard257 said:

permanent magnet magnetic fields which are made of the set of electrons on their navigational path, aka magnetic wave 

 

its possible to redirect great part of that wave by wrapping a copper wire which will make travel some of the electrons through the coper wire, adding movement only increase this transition which is commonly known as electricity, without movement the electron transportation is insignificant but is there and can be measured 

Well, I am an electrical engineer and I can confirm what other people have already told you in this thread: You seem to have several misconceptions about the fundamentals of electromagnetism. That's not a personal attack, just an objective evaluation of your claims.
If you want to contribute to the development of technologies like the ones you are describing, you first need to understand the underlying concepts properly and then have a go at it.

Beware of those youtube videos with permanent magnets and some amount of wire around them. Several of them are actually fake. You can even try building such contraptions yourself. Magnets are not that difficult to get (just follow the appropriate safety measures if you get a very powerful magnet), copper wire is even easier to find. Then, you just need a cheap multimeter (either you have one, can get a cheap one or maybe borrow one) and some sort of load like a small resistor and see if you get any power output. Just keep that circuit away from other large electromagnetic fields so as to not compromise your results.

9 hours ago, whm1974 said:

snip

Yes, here in Europe I have seen stuffed cabbage, stuffed bell peppers, stuffed tomatoes, they are not that difficult to find. Stuffed grape leaves are quite different though in my opinion, both in terms of texture and taste.
You can easily find recipes for stuffed grape leaves in Greek, Persian and Turkish cuisine (and probably in many others as well). Sometimes, shops also sell canned grape leaves in salt water that you can use to make that dish. The alternative would be to find a restaurant in your area that has stuffed grape leaves on their menu.

I have had stuffed grape leaves several times with different stuffings and both hot and cold. I think I prefer them cold because the flavours turn out differently.

When it comes to fig leaves, I am more skeptical (didn't try it yet). Those leaves should be quite difficult to chew and also when you break off a fig leaf, there is a milky, sticky liquid with a distinct odour coming out of the stem. I'm not sure how that tastes. Maybe they are ok if you cook them long enough.

There is a new type of diet called the see food diet: Every time I see food, I eat it.

That method is interesting, but it can be abused (as can all tracking methods). From what I have read, I think it could be also be circumvented by randomizing some GPU parameters like clock and voltage in a small range, so that it is not noticeable for the user but still manages to throw off that tracking algorithm.

On 1/24/2022 at 6:36 AM, GamerDude said:

 

Like a Valve to vent off some Steam?

Well, I don't know any teacher with funny names, but during my electrical engineering studies I encountered a certain type of antenna called "Beverage antenna". Turns out it was named after a Lt. Cmdr. Beverage, which imho is a very nice name

7 hours ago, dilpickle said:

Everyone knows FCKGW

I know the story around that particular key, but this well-known key one is not among the ones I know by heart 

I know 3 license keys by heart, saved me a lot of time back in the day since I was doing frequent OS reinstalls.

52 minutes ago, Rauten said:

Any italian-espresso machine users that can tell me what the correct way to use it is?
{snip]

 

I'm not an expert on this, I have used such a device a few times though. I've mostly heard it called Bialetti (which is one of the most famous brands that makes these).

As far as I know, the procedure is as follows:

• unscrew, put water at the bottom so that the water level is just below the small hole (which is probably a valve to prevent excess pressure)
• put the coffee into the appropriate container and assemble everything
• put it on the stove
• wait until the upper compartment contains enough brewed coffee and until there is not too much steam coming out of the duct in the middle of the uppper compartment
   

Don't set your stove too high, the water just has to boil and turn into steam. When the brewing process is finished, remember to disassemble the device and to clean it (not immediately after brewing since it will still be quite hot, but within a reasonable time frame).
 

I noticed that many of these devices are made out of aluminum, which I'm not a fan of. I prefer stainless steel ones, those are more hygienic.

There are some portafilter machines by Graef (german company) that have adapters for capsules for all of the larger vendors, but in my opinion it is not economically viable to buy those for that purpose.

What exactly kills/injures/hurts when it comes to electricity deserves a longer explanation, I would say some of electroboom's videos are a good start.

It always depends where these voltages are being applied, what the resistance of the circuit is and how much power the source can provide, just to name a few parameters.

If you apply 1V to two points on the exterior of the human body, you shouldn't be able to do much damage because the resistance of those paths will not allow any significant current to flow. That would change of course if you could apply that 1V to let's say a neuron for example.
The way 1V could hurt is if you short that 1V source with a very low resistance object (piece of wire), which can then generate a lot of heat provided the source can deliver enough power. You could then get hurt by that heat in case you come into contact with it, but I'm not sure if that is the kind of danger you were refering to. 

I got a nice used coffee machine:

It is a Graef ES 85. At first I thought it was defective, but then I realised it is working perfectly

6 hours ago, Andreas Lilja said:

French is hard.

 

Still have issues with the past participles with "to have". (participes passés avec avoir)

 

There are even stranger rules with verbs using the reflective pronoun "se" and "être". There, the "accord" can depend on whether the action implied by the verb is reciprocal or not etc.

22 hours ago, WkdPaul said:

Il n'y a pas déjà un fil de discussion pour ceux qui parle Français? Ou alors c'est pour les citoyens Français ?

 

EDIT ; ah je savais qu'il y avait déjà un fil de discussion, j'ai joint tous les fils de discussion !

J'espère que cette discussion en français va continuer maintenant qu'elle a été redémarrée. Je n'ai pas souvent l'occasion de parler en français, donc j'essaye d'en profiter  

I also noticed that he said he wanted to read Harry Potter in French. I just hope he gets over how some characters' names have been translated. As an example, take Severus Snape who in the French version is apparently called "Severus Rogue" which sounds like the name of someones who teaches other things in dungeons than potions.