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LED, bipolar diffused common-cathode ultra wha?! Answered

I was browsing through one of my local supplier's LED catalogue..Literally overwhelmed by the types of LED out there.. Diffused, non-diffused, super flux, super bright, ultra bright, common anode, common cathode, flashing, bipolar, etc..Anyone care to enlight this electronics noob? Plus some of the LED spec says something like 630nm, 1800mcd, what do they mean? Thanks..


There are 2 types of "bipolar" LED. One was mentioned already, the three legged common anode, or common cathode type 3 legged LED. There is also an LED that is bipolar that has only two legs, and can be referred to as bidirectional also. Normally, they emit a different color depending the the direction of the current BiPolar 2 legged.


10 years ago

> super flux, super bright, ultra bright... There are two aspects to the brightness of an LED. One is the total amount of light emitted, perhaps called "luminous flux" and measured in Lumens. The other takes into account how well that light is focused into a beam, and is measured in Candelas (or millicandelas: mCd) "high", "super", and "ultra" bright LEDs are assorted generations of brighter LED chips, and somewhat meaningless; you'll have to read the datasheet to check out the specific brightness AND the viewing angle. However, "superflux" is USUALLY a combination of chip and packaging designed to provide high brightness AND a large viewing angle (and they're usually weird 4-lead square packages.)

Now that you mention it..yes the super-flux LED is enclosed in something,and comes with 4 pins..

630nm stands for a wavelength of 630 nanometers. It also stands for red.

> Diffused, non-diffused . With/without a frosted lens (not 100% sure) . > super flux, super bright, ultra bright, . Sound like advertising terms to me. Ie, devoid of any real meaning. . > common anode, common cathode . More than 1 LED in parallel with the anode (or cathode) ends hooked together. The cathodes (or anodes) will be separate leads. . > flashing . It flashes. . > 630nm . Wavelength of emitted light in nanometers (nm). . > 1800mcd . How bright it is in ?millicandela? . . Now it's back to bed for me.

Does the flashing LED able to flash on its own simply by connecting it to a battery?