I have this circuit:
If D2 was a resistance, I could just combine it with R2 to get some composite resistance that I could put in series with R1. That way, I could calculate the resistance of the entire circuit and, thus, the total current.
Now, this is not the case here but I know a few things here:
- whatever voltage drops at D2, also drops at R2
- the current through R1 is the same as through R2+D2
But I do not know the current from the beginning, so I cannot calculate the voltage drop at R1. And the diode is non-ohmic, so I cannot find out anything about it.
In this way, I do not see how I could apply Kirchhoff's laws or any other methods because I seem to be missing information... where do I start here?