ETG, 5mm Blue-Green LED, part # ETG-5MN490-15
Received on 01-17-04, tested on 01-19-04
This is a 5mm LED in a standard, water-clear epoxy case.
The overall dominant wavelength (where you would point to on a color chart) appears to be around 495nm, which is just a hair more blue than is usual for blue-green LEDs manufactured today. The color is rather vibrant and unnatural, and would work well in a device used at a rave or dance club. My spectrometer is broken, so I can't do an actual measurement on it - just an "eyeball" measurement.
The beam is circular with a more abrupt edge than is usually seen in clear bodied 5mm InGaN (indium gallium nitride) LEDs.
Although this isn't the brightest LED ever made, it's still quite bright, and isn't something you'd want to stare directly into while it's powered up.
The die (light emitting portion) appears to be of Cree Corporation origin, as it has a single bond wire attaching in the center. This indicates an LED with an InGaN layer deposited on a more or less conductive silicon carbide (SiC) substrate.
Measures 5,300mcd with a test current of 26mA.
A Hosfelt LED tester was used for this measurement.
The viewing angle appears to be around 15°.
For the rest of the high current LEDs on this page, I will use an Energy One XP-4 power supply and a Meterman LM631 light meter for the tests.
ETG, model # ETG-5SE-RGB-IC, flashing RGB, $3.50 each for small qty
Received and tested 08-15-02
Part number look familiar?
Thought so. This RGB flasher LED just arrived, and it appears to be a replacement for the LED shown directly below. Instead of a blob of melted broken toilet (porcelain or ceramic) on the base, this LED is built to be mechanically identical to an ordinary 5mm LED, including having standard rectangular profile leads like most modern LEDs have.
As you can see, this LED can be used as a direct replacement for any ordinary 5mm LED, but it definitely doesn't behave like one. It has a series of flash/fade modes programmed into it, so all you do is feed it a few volts, and let it do the driving.
The exact sequence is: Series of quick flashes; red, green, blue, red+green, green+blue, blue+red, and then all three at once. It repeats this fast cycle 2 times. Next, the red fades on, stays on for about 2 seconds, then fades out. Same with green, then blue, then red+green, green+blue, blue+red, and then all three. It does this slow fade for two entire cycles; then everything begins again. Figure it takes a bit under a minute to complete the entire sequence and then recycle. If it is interrupted at any time, it restarts from the beginning as soon as you apply power again.
When driven to 20-25mA, the voltage drop ranges from 2.94v with all segments lit, to around 3.6 volts with only the green segment lit. Figure to supply it with at least 3.6 volts, but not much over that. Resistor it as you would a Nichia green, blue, or white LED (or any other high Vf gallium nitride lamp); and it won't give you any guff.
ETG, model # ETG-5SE-RGB-IC, flashing RGB, see above for newer version
Received approximately 07-05-02, tested 07-12-02
A week ago, I received a strange little "LED" lamp from ETG; it was a fully self-contained RGB LED flasher. (See below). Today, another RGB flasher LED showed up; and this one is more unusual than the last. This one comes in what looks like a standard sized, T1 3/4 (5mm) clear epoxy package with the flasher circuit and LED chips attached to the base with some kind of ceramic-looking compound.
This LED has three leads; and I'm honestly not 100% sure what they're all for. Two of them are obviously the power leads; the third one may be a control input of some kind. As I experimented with the LED, I was able to make it change flashing modes by plugging and unplugging it, and by touching the tip of another resistor connected to B+ to the third lead. I will await a pinout from my friend at ETG before I risk ruining this unusual lamp. Some things you can't un-do. You can't un-strike a match. You can't un-peel a tomato. You can't un-flush a toilet. And you can't un-blow a blown LED.
ETG, model # ETG-2SE-RGB-IC, flashing RGB, price/availability not yet known
Received and tested 07-01-02
Do you know a true "LED nutcase"? Someone who loves things that glow, and is eager to see all the new LED products as they emerge on the market? Want to make his eyes bug out like somebody switched The Price Is Right with a porno flick right in the middle of Plinko or Hole In One or Two? Then show him one of these!
Close-ups of this unique RGB flasher
Although it is labelled as a "flashing LED" and it's the same diameter as an ordinary LED, if you look closely you can see some SMD parts and some other structures inside the epoxy dome. I don't see an exposed IC; it actually appears the flasher circuit is three seperate ICs, each one mounted inside a tiny ceramic block, and each with an LED die mounted to its top. It is also possible that the IC is a larger device and is mounted underneath the visible components. In any case, this very interesting component is actually a complete, microminiature PCB with flasher circuit and three LED chips, all encased in a discrete, LED-like ceramic & epoxy package.
A couple of "action" shots.
The LEDs don't just flash. The IC is programmed with several effects, which cycle in sequence. It starts with a medium speed back-and-forth color fade, then goes to a slower, unidirectional color fade, then each LED flashes individually in sequence, then there's a pseudo-random thing where all the chips flash in some kind of alternating pattern. This last mode was too fast for me to determine the exact sequence of flashes, so let's just say it was neat. ;) Then the whole thing repeats.
According to the manufacturer, this "LED" should be treated like any other GaN LED, and its forward voltage kept at 3.6v. At that voltage, average current should be in the neighborhood of 30mA, though it is tricky to measure because the LED states keep changing.
The other item of note is the lead spacing is a little wider than is usual for a typical 5mm LED, and the leads are round in profile; rather than being rectangular (2x4 shaped) like an ordinary 5mm through-hole LED's leads are.
WHITE 5500-6500K InGaN+phosphor
ULTRAVIOLET 370-390nm GaN
BLUE 430nm GaN+SiC
BLUE 450 and 473nm InGaN
BLUE Silicon Carbide
TURQUOISE 495-505nm InGaN
GREEN 525nm InGaN
YELLOW-GREEN 555-575mn GaAsP & related
True RGB Full Color LED
Spider (Pirrahna) LEDs
True violet (400-418nm) LEDs
Agilent Barracuda & Prometheus LEDs
Oddball & Miscellaneous LEDs
Programmable RGB LED modules / fixtures
Where to buy these LEDs
Links to other LED-related websites
The World's First Virtual LED Museum
Legal horse puckey, etc.
RETURN TO OPENING/MAIN PAGE
LEDSaurus (on-site LED Mini Mart)
This page is a frame from a website.
If you arrived on this page through an outside link,you can get the "full meal deal" by clicking here.