When a device drains current from a voltage divider loading It, the voltage must be calculated by the next formulas.
Formula 1
V2 = V x [ (R2 x R3) / (R1 x R2 + R2 x R3 + R1 x R3) ]
Where:
V2 is the voltage accross the loaded resistor (R2) in volts (V)
V is the voltage applied to the divider in volts (V)
R1 and R2 are the resistors in the voltage divider in ohm (Ω)
R3 is the load resistance in ohm (Ω)
