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How to setp up LED red to 1.8V and blue with 2.7V?

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here I have an image which explains the reason for this thread.

From a video, it was showed that in the following circuit only red LED glows:
9V battery, 3.9K Ohm resistor, 2 LEDs blue (2.7V) red (1.8V).

I build the circuit and both LED are emitting light.

Thank you.

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No one has an idea? Or is my question to beginner like?

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Accepted by topic author xan137



The LEDs color selection is not related to the corresponding voltage that the LED needs for a proper functionality (is more like a matter of aesthetics).

This is not implemented in its model.

You can use the Ion parameter to adjust the voltage across LEDs, using a series resistor with them.

However, this is not the best approach, since for a VD voltage of 0.6V, the LED easily opens, behaving like a regular diode, and not an LED.

This issue is taken into account and transmitted further, with the hope another component will be added in the future.

Thank you for your input on this matter.

Monica Ignat

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