Would a LED short itself?

[Michael A. Terrell]

"Mr. Man-wai Chang" wrote:

On 2/07/2013 4:35 AM, John Fields wrote:
Oh, now that things are getting real and you're losing face, you want
to bail in order to cut your losses?
Figures...

Have you ever studied seriously about LED and high current from the
perspective of material science?

Could current-limiting resistor for LED be nothing but a superstition
among electronic engineers? Objective is to sell more resistors?

PLONK

 

[Tom Biasi]

On 7/4/2013 12:47 PM, Michael A. Terrell wrote:

"Mr. Man-wai Chang" wrote:

On 2/07/2013 4:35 AM, John Fields wrote:
Oh, now that things are getting real and you're losing face, you want
to bail in order to cut your losses?
Figures...

Have you ever studied seriously about LED and high current from the
perspective of material science?

Could current-limiting resistor for LED be nothing but a superstition
among electronic engineers? Objective is to sell more resistors?


PLONK

He did have a smiley face Michael.

 

[Daniel Pitts]

On 6/30/13 4:43 AM, Mr. Man-wai Chang wrote:

On 29/06/2013 10:43 PM, John Fields wrote:
How would you rate its fusing current?

By just applying 3V over the LED, it would draw whatever current needed?

Summarizing the replies from the answers, most said that the LED might
**NOT** always just blow like a fuse. And that's the main reason of
using a current-limiting resistor.

If LED would always die like a fuse without shorting itself, then there
should not be a need for a resistor.

You need to current-limiting resistor to *prevent* the LED from dieing,

unless you want your LED to die.

It is also possible that it will draw enough current to damage other
circuits *before* it finally lets out the magic smoke.

Resistors are *extremely* cheap. LEDs are only moderately cheap. If you
can save your LEDs by adding something that is 1/10th of the cost of
one, why even ask why?

 

[Daniel Pitts]

On 7/1/13 1:35 PM, John Fields wrote:

On Tue, 02 Jul 2013 01:00:48 +0800, "Mr. Man-wai Chang"
toylet.toylet@gmail.com> wrote:


OK, let's end this thread! I will use current-limiting resistor.

---
Oh, now that things are getting real and you're losing face, you want
to bail in order to cut your losses?
Wow, trollbaiting much? Mr. Chang had admitted defeat and yet you

continue the thread. There is a difference between being dense (as Mr.
Chang appears to be) and being a Troll (which by this post alone seems
to match you).

Figures...

Do you even know how to use a current-limiting resistor?

 

[Daniel Pitts]

On 7/4/13 9:22 AM, Mr. Man-wai Chang wrote:

On 2/07/2013 4:35 AM, John Fields wrote:
Oh, now that things are getting real and you're losing face, you want
to bail in order to cut your losses?
Figures...

Have you ever studied seriously about LED and high current from the
perspective of material science?

Could current-limiting resistor for LED be nothing but a superstition
among electronic engineers? Objective is to sell more resistors?

Ha.

No, I have actually burned out LEDs. I have also burned out chips which
were trying to power the LEDs. I have studied the fundamentals of how
diodes in general work, and LEDs are a type of diode.

Resistors are so cheap I can't imagine a large enough profit margin on
them to justify such a conspiracy.