How does a single LED light glow in multiple colours?
A Multi-Color LED is actually capable of generating many color ( more that one ), within itself. And that's the main things that attracts different electronics system designers for using it as they want their system to occupy as less space as possible. For that purpose they are best, as One RGB LED which is actually capable of generating Red, Green & Blue including to them 3! (factorial) i.e, 6 colors are possible like in addition to RGB, they are cyan, magenta & yellow. This property is well utilized by the motherboard manufacturer, to show the power indication, RED means lower power than the recommended rating, green means ambient power etc. So they compacted the space requirements.Bi-Color LEDs:(Actually Capable Of Generating 3 Colors)So lets see the below equivalent circuit of a bicolor LED (Common Anode one) & try to understand a bit about it...In the above diagram ‘k’ is ground or neutral,& if the positive is supplied on ‘A1’ it glows red,similarly ‘A2’ is for green.From the above two pictures we can say that the there are three pins of it, instead of the common two pins, the common pin ( The middle pin ) which will be attributing it to be a common Anode or Common Cathode will help us decide that wether a +5V power supply has to added or GND has to be applied(if its common anode then apply GND to the middle/common pin other vise viceversa). The First pin of the above LED is attributed to generate the Green color & the third pin will generate Red color if a positive voltage supply is given to it, in case of common anode or GND to it in case of Common Cathode. What if we make the 1st & the 3rd terminal either +5V or GND, well in that case it will simply either switch off ( In reverse biased condition) or both the color will be producing simultaneously resulting in a different 3rd color.
Which colour LED light consumes less energy?
Normally colors dont figure in energy consumption of an LED. Though the voltage drop in red led is of about 1.8 volts.However it is the current consumption which governs the power consumption. LED’s are constant current devices and can be lit with currents in the range of mili and micromili amperes.But the point here is about the usability of running the LEDs at such low currents. Such low currents can be used for a blinking led used for location purposes.But for illumination purposes, you definitely need more current.As for color, the most efficent color is the green colored LED. Simply because the green color is easily distinguished by the human eye in the visible spectrum.
How can you make the same led change colors?
If this LED is output one color white light, you maybe can change the colorful lens or cover over it to change the colors.If this LED is a multi-color type, like the 5050 SMD RGB LED, this LED has 3 color chips inside of it - RED, GREEN, BLUE. As we know, the tri-phosphor can make our all colors out. So, when 5050 LED light working with a driver, which can adjustable the colors, you can change the color as your requirements.This is James Lee from A-Plus Lighting, wish our answer can help you!
How do I change the wavelength of a LED bulb? Can it be changed by changing the voltage?
No. The wavelength of light emitted by the LED is tuned based on the bandgap of the material used to produce it. In other words, it is set by the material used to produce the LED. By changing the voltage, the most you can do is change i’s brightness.If you want an LED that changes wavelength, get a broad-spectrum LED (i.e. white light LED), and put an optical filter in front of it. The white LED emits light in a broad range of wavelengths in the visible region, and by putting in the optical filter, only light of a certain frequency can pass through.
Why was Princess Diana buried in a lead lined coffin?
It’s a royal tradition to be buried in a lead lined coffin. It was rumoured the coffin weighed 50 stone, which is 14x50pounds or 700lbs. The 8 Welsh guards who carried it have subsequently commented how heavy it was and difficult to carry.'She was OUR Princess’ Welsh guards recall moment they carried Diana’s coffin to funeralSuch a coffin is kept on standby in case a member of the royal family dies. The lead lining preserves the body for up to a year. Her unexpected death while abroad, and her somewhat ambiguous status now divorced, meant it took longer than normal for arrangements to be made. Usually the arrangements for senior royals are established and practiced down to the tiniest detail. In Diana’s case the body had been left in a warm hospital room and was not put in the morgue (reportedly for “security reasons”). The body began decomposing in the August heat and there were concerns about what to do. Fans were placed in the room. The body was hastily embalmed. Hence another reason for the coffin.There is a UK law that bodies interred above ground have to be placed in a sealed coffin. Originally, it was anticipated that Diana would be buried in the Spencer family vault with other members of her family. Had she still been married to Prince Charles she would have been buried in one of the royal burial places such as St George’s Chapel. This is where the Queen Mother is buried and the intended burial place of QE2. However, in Diana’s case her brother changed the burial arrangements and had her buried on an island in the middle of a lake in the grounds. He said it was for public safety reasons. But the body was most likely prepared with the thinking it was going in the family vault - another reason for a sealed coffin.