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Do you think an LED is a resistor?

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PlainName:

--- Quote from: Sredni on April 24, 2024, 02:39:22 pm ---
--- Quote from: PlainName on April 24, 2024, 02:33:59 pm ---
--- Quote ---It is what it makes it a diode
--- End quote ---

That's what you  keep getting told. A diode has non-linear resistance. A resistor has linear resistance.

--- End quote ---

So you agree that a diode is a nonlinear resistor.

But you don't think that nonlinear resistors are... resistors. Correct?

--- End quote ---

I think you need to take a course in reading comprehension. Ask an optician why you keep seeing 'resistor' where it really says 'resistance'.

BU508A:

--- Quote from: Sredni on April 24, 2024, 02:27:40 pm ---Because I am discussing the FUNDAMENTAL nature of the diode.

--- End quote ---

This is the fundamental behaviour of a diode. Doesn't really look like a resistor.

Sredni:
That's a piecewise linear resistor: infinite resistance under threshold voltage, zero resistance above.
Really, this is basic circuit theory.

And no, to answer other objections I use resistor and resistance with care: resistance is the property, resistor is the circuital element.
A linear resistor (generally called "resistor" without adjective) has constant resistance. A nonlinear resistor has voltage or current dependent resistance.

And yes, form the point of view of the circuit all a (linear or nonlinear) resistor does is opposing a resistance and dissipate power. Dissipate means it leaves the circuit. It does not matter in what form: heat, light, chemical energy...
I have simulated LEDs in LTSpice and never saw light coming out of the screen :-)

AVGresponding:
Every time I glance at this thread, I can feel IQ points evaporating

bd139:
Is a non-linear resistor, like a thermistor non-linear in at least a small signal model at a set temperature? No it's linear because "R" is constant under those conditions and not dependent on I or V.

The definition of a non-linear resistor is even broken according to the arguments here.

So you can't even reason about the thought framework the question is posed in because it's so poorly defined.

Therefore I posit that it doesn't matter if anyone thinks an LED is a resistor or not, the original poster is a troll trying to be clever, thus is a dickhead and a fuckwit and this thread should be locked.

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