I am learning basic electronics with iCircuit. I have build a very simple circuit with just a 5V battery and a LED connected in series, as seen in the image attached.
There is an option called "Fwd Voltage @ 1A" which I do not understand. The normal forward voltage drop for LED is 1.7V - then what does it mean if I enter "1.7V" in this field? Do I automatically add enough resistance in the circuit to limit the voltage across the LED to be 1.7V?
How do I adjust the "Fwd Voltage @ 1A" in real circuitry, or is that something rated/fixed on the LED?