This table displays how the resistance value of the shunt (R2) R_shunt drains power if it is too high.
Also you can see how small the voltage drop gets if the resistance is to low, what makes it hard to measure.
! I (total)
! U (total)
! R1 R_load! R_shunt! U (load)! R2 U (shunt)! U1! U2! P(lost)
|-
| 0,25A