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Calculate Current

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dtmouton:
I forgot to mention that in South Africa, you have to be a charted engineer and have a "Government Ticket"  if you do work that is potentially life threatening. The "Government Ticket" also requires a few years of part-time study and is mainly about safety and industrial law.

jesuscf:
With two test points the problem is easy to solve, because it allows us to use the diode equation.  In my opinion two test points should have been provided from the beginning.  Attached image shows how I solved the problem assuming the four diodes are identical, and two test points are available.  I used XCAS to solve the non-linear system of equations.

jesuscf:

--- Quote from: dtmouton on October 19, 2021, 10:20:34 am ---A slightly expanded version of the solution posted above.

--- End quote ---

For LEDs n is often larger than 2.

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