Green Earth's Lethal Gases

Green Earth's Lethal Gases

2021-10-11
Green Earth
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Bright Idea: New LEDs Can Detect Off Food And Lethal Gases
Bright Idea: New LEDs Can Detect Off Food And Lethal Gases
New LED technology has potential to benefit firefighters, miners, the military, plumbers and households.(Source:University of Melbourne) Your smart device could soon be even smarter with a new infrared light emitting diode (LED) that is ‘tuneable’ to different wavelengths of light – it could enable your fridge to tell you when your food is going off and your phone to tell you if that Gucci purse is real. The technology has been developed by the University of Melbourne, the Lawrence Berkeley National Laboratory, the University of California, Berkeley, and the Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems (TMOS). They have come up with a device that could identify a suite of gases, potentially including lethal ones, improving the safety of firefighters, miners, the military, and your local plumber. The work appeared in the journal, Nature. Infrared (IR) spectrometers are common laboratory equipment that can identify different materials by analysing their infrared signatures, which is invisible to the human eye. Just like an AM radio can be tuned to different frequencies of radio wave, IR spectrometers can be tuned to different wavelengths, giving a broad-spectrum analysis of a gas sample. However, these machines are bulky and expensive and not usually practical to take out of the laboratory and into the field. “Our new technology bonds a thin layer of black phosphorus crystals to a flexible, plastic-like substrate, allowing it to be bent in ways that cause the black phosphorus to emit light of different wavelengths essentially creating a tuneable infrared LED that allows for the detection of multiple materials,” University of Melbourne Professor Kenneth Crozier said. “This technology could fit inside smartphones and become part of everyday use.”For example, the bacteria found in meat release various gases as they multiply. The presence of these gases is a good indication that the meat is spoiling and is no longer fit for consumption.“The device placed inside a fridge could send a notification that meat is going off. When pointed at a handbag, it could reveal whether the bag is made of real leather or a cheaper substitute,” said Professor Crozier, who is also the Deputy Director of TMOS.Current materials that are used for IR photodetectors and light emitting devices can be difficult to manufacture, in large part due to the need for multiple layers of perfectly linked crystals. This new black phosphorus technology requires just one layer allowing the device to be flexible, giving it unique properties when bent.“The shift in black phosphorus' emission wavelength with bending is really quite dramatic, enabling the LED to be tuned across the mid-infrared,” said Professor Ali Javey, from the University of California at Berkeley, whose group led the work.Importantly, the device could make the work of firefighters, miners and military safer, allowing them to identify potentially lethal gases from safe distances as the ultra-thin, ultra-light devices can be placed on small drones. Flying such a drone over a building fire could tell firefighters what dangers they face and equipment they’ll need.The low-cost technology could also make its way into devices for use by plumbers and building managers.“Our IR photo detectors could be integrated into a camera so that we could look at our phone screen and ‘see’ gas leaks or emissions and be able to determine what kind of gas it is,” Professor Crozier said.
Analysis of the Necessity and Measures of LED Street Light Lightning Protection
Analysis of the Necessity and Measures of LED Street Light Lightning Protection
  Author :Green earth– LED Strip Lights manufacturersThe LED street lamp has developed in China has had a history of nearly ten years, including power supply, power supply, heat dissipation technology, optical technology, etc., new breakthroughs every year. Some of the basic technical issues of some LED street lights have not been resolved in my country. For example, the lightning protection problem of LED street lights is one of the problems that need to be solved. So why we want to do LED street lightning protection? What should we do?1.LD street light lightning protectionMillions of volts typically transmit from the clouds to the ground or another cloud. In the transmission, the lightning generates an electromagnetic field in the air, producing thousands of volts on the power line, generating induced currents of hundreds of miles, which typically happen on outdoor exposure wires, such as streetlights. Signals and base stations produce surges, and surge protection modules directly face surge noise from the front-end power cord of circuitry. Reduce the threat of surge in surges by transmitting or absorbing surge energy to other operating circuits such as AC / DC power units such as LED lighting. On the LED street light, lightning will generate induction surges on the power cord. The impact current of this energy causes the electric wire to generate a shock wave, which is impact wave. Including this insection, the world has a sharp increase in the world, this wave creates a sharp wave on the sine wave on the transfer line of 220 volts, and the sharp street light will be damaged. Therefore, LED streetlights are good for their life, which is currently required. Be2. Lightning lightning measures for road lightsThe LED street light requires a small supply voltage, and the power supply is usually used to convert AC power to DC power. Therefore, solving LED street lightning protection problems need to increase the street lightning protection module, which can effectively help LED street lightning lightning.
Need Help Wiring a 3 Way Switch
Need Help Wiring a 3 Way Switch
Colors in cables are to distinguish the wires onside the cable. They are not there to color-code by function. That situation is sufferable in simple switch circuits, but it quickly becomes intolerable in a 3-way. I strongly recommend always color-coding by function, and you do that by marking wires with colored tape, a 5-pack is $4 at the big-box. Aim to mark both ends of the wire, and mark them the same of course. Now here is what a 3-way switch circuit looks like. That's simpler than you expected, isn't it? Notice there is no need to distinguish the two yellow travelers from each other; exchange them and it still works. So I would start by tagging both ends of the travelers (white/red as you surmised) with yellow tape, just to get it out of your hair. Now you see where the common wires on the two switches actually go to different things. One gets supply hot from source, and the other gets switched hot to the lamp. Cable 3 is source, so cable 2 goes to the lamp. I would mark its "hot" with red tape, since it is switched-hot. Now, that can either go to the local switch's common, or the remote switch's common. I don't care which, but for symmetry I might make switched-hot the one that comes down from the remote switch.* So tag that black wire in the /3 with red tape.** Then, always-hot goes to the common of the local 3-way, so it becomes a third pigtail off the supply. Now you've tagged two wires red, join them. Join the whites also. See how this corresponds to the above diagram. *Another advantage: it eliminates always-hot in the remote 3-way, which removes temptation to try to use it for something, and then bootlegging neutral from ground or another circuit's neutral. ** instead of marking the black "red", you can just rearrange the wires so the black/white are travelers, and red is the commonSo my wife and I moved into a new-to-us house with almond switches/outlets and we wanted to change them to white. Everything has been going swimmingly until my wife decided to do a 3-gang light switch box and now it doesn't work. I can't really say how it was when we started because she removed all wire nuts 'to clean it up', removed some pigtails, etc. So now we're starting from scratch.So, there's 3 switches (numbered left-right in the box): SW1 is a 3 way switch that controls a set of 6 overhead lights. SW2 is a single pole switch that controls a single table chandelier. SW3 is a single pole for an outside light.Coming in to the box, there are 5 cables, a 3 wire (cable1) and (4) 2 wires. Cable3 appears to be the source from the panel as when I separated all wires and turned on the power, only the black of cable3 had power. I know that the last two cables connect to the chandelier and outside light. There were two pigtails removed from the box, and when I pigtailed the black cable3 wire to the SW2 and SW3, and then ran the black cable4 to SW2 and black cable5 to SW3, the chandelier light and outside light both work.But now I'm stuck figuring out how to wire the cable1/2/3 for the 3way switch. I checked the 3way switch on the other side of the room, and it has a black going to the common terminal, a white to one of the travelers, and a red to the other traveler. Tough to see directly, but it looks like all 3 come from the same cable. I've tried connecting the black of cable1 to the common, and the white/red of cable1 to the travelers, while wire nutting the black/whites from cable2/3 together. When I do this, the lights stay on but you can't turn them off (with either 3way switch). Any ideas on the next steps?·OTHER ANSWER:So my wife and I moved into a new-to-us house with almond switches/outlets and we wanted to change them to white. Everything has been going swimmingly until my wife decided to do a 3-gang light switch box and now it doesn't work. I can't really say how it was when we started because she removed all wire nuts 'to clean it up', removed some pigtails, etc. So now we're starting from scratch.So, there's 3 switches (numbered left-right in the box): SW1 is a 3 way switch that controls a set of 6 overhead lights. SW2 is a single pole switch that controls a single table chandelier. SW3 is a single pole for an outside light.Coming in to the box, there are 5 cables, a 3 wire (cable1) and (4) 2 wires. Cable3 appears to be the source from the panel as when I separated all wires and turned on the power, only the black of cable3 had power. I know that the last two cables connect to the chandelier and outside light. There were two pigtails removed from the box, and when I pigtailed the black cable3 wire to the SW2 and SW3, and then ran the black cable4 to SW2 and black cable5 to SW3, the chandelier light and outside light both work.But now I'm stuck figuring out how to wire the cable1/2/3 for the 3way switch. I checked the 3way switch on the other side of the room, and it has a black going to the common terminal, a white to one of the travelers, and a red to the other traveler. Tough to see directly, but it looks like all 3 come from the same cable. I've tried connecting the black of cable1 to the common, and the white/red of cable1 to the travelers, while wire nutting the black/whites from cable2/3 together. When I do this, the lights stay on but you can't turn them off (with either 3way switch). Any ideas on the next steps?
How Much Is the Price of LED Industrial Mine Lamp? @LED Industrial Mine Lamp Price
How Much Is the Price of LED Industrial Mine Lamp? @LED Industrial Mine Lamp Price
  Author :Green earth– LED Strip Lights manufacturersMany of the LED industrial miners' customers are very concerned about the price of LED industrial mine lamp. Many customer inquiry issues will ask how much is the price of LED industrial mine lamps, suitable for use, how long can it be used, is there a guarantee time? Every time I answer the customer's question, many people will think that it is expensive than the price of LED industrial mine lamps asked in other companies. In fact, all this is caused.First, you have to know the price of LED indillars, LED chips, LED industrial and mining power, heat dissipation housings. The domestic 1ed chip quality is uneven. Many manufacturers use the incompleteless 1ed chip produced by the workshop in order to reduce costs. The number of chips is insufficient, which is prone to deteriorate, and the heat dissipation performance is poor, so that the LED industry is not enough, chip seal It is easy to rupture, the chip aging speed is fast. Some manufacturers 1ed industrial mine lights are low because they use a poorly poor-quality 1ed industrial and mining power supply, which is easy to cause the chip to illuminate unstable, and the power supply of light attenuation, poor power supply is easy to make the 1ed industrial intensity in a very short time. A degradation. We all know that a good cooling shell is importance. A good heat dissipation housing can be dissipated to a 1ed chip, avoiding the length of the 1ed chip to heat generation.As the saying goes, a price, one point, each manufacturer is in the premise of ensuring quality, the price can be so low. Everyone needs to contact us as soon as possible, welcome everyone to come to consult!
Classification of Three Anti-lights (below)
Classification of Three Anti-lights (below)
  Author :Green earth– LED Strip Lights manufacturersThe last text is given you one of the three anti-lights.——Anti-glare three lights, then let's introduce another kind of one.——The mirror three definition lamp, the specific characteristics are as follows:1. Application range: Mirror three anti-lights meet the lighting demand of railways, electricity, metallurgy, various places, stations, large amenities, venues and other places.2, performance characteristics: highlights of the mirror three-definition lights have a mean service life of 20,000 hours, eliminating the trouble and inconvenience of frequent replacement lamps, which uses new technology capacitive energy-saving ballasts, similar The ballast is 20% compared to the drain, and constant current output can greatly increase the life of the bulb.3, professional design: integrated streamline type cylindrical structure, light projection is evenly suitable for a variety of high-cemers, high shed fixed lighting, the inside of the lamp body is composed of seismic materials and shock absorption structures, which can be long-term high frequency and strong The vibration site works.4. Protective level: housing protection rating IP65, anti-corrosion level WF2, housing does not corrode, no rust.5. Installation method: can be installed in a variety of ways such as ceiling and ceiling as needed.6. Advantages: The inside of the mirror three light lamps passes through structural and material double damasters, the whole lamp is good, using new processes such as rolling to ensure the overall housing overall, reliable sealing, waterproof and dust-proof, with good electromagnetic compatibility It does not cause electromagnetic interference to the surrounding environment; the overall temperature rise of the mirror three-way lamp lamp is low, and the heat dissipation is good, and the faulty rate can be reduced; in line with the humanized design and environmental color matching, it is fully harmonious with the natural landscape.The above is about the specific introduction of the mirror three anti-light, I hope to help you understand the three anti-light lights more
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