I'm trying to power a 4v gsm module with a 5v power supply and need to lower the voltage so i don't mess anything up. I know the simple equations such as V=R*I ect. I need to lower 5v to around 3v...I'm thinking i would accomplish this with resistors in parallel or series to facilitate a voltage drop (i think that is the right term).
I also know the Vt=Rt*I.
So in a parallel or series or circuit combining the two you would find the Rt (total resistance) by adding all the values together. Then you would plug this value into the equation with the known 5V power supply to give the overall current of the circuit.
From there you can go throughout each resistor and discover the voltage drop by filling in the overall current (discovered from our last formula) and the resistance of that current resistor.
So this tells the amount of voltage drop. In a circuit containing multiple resistors each resistor would have a different voltage drop and the voltage drop over all the resistors would add up to the voltage sourced by the main power supply. But would it be safe to use this voltage drop to be a source to a lower voltage rated device (my gsm module).
i believe the correct term is voltage drop....i may be referring to this wrong. Am i on the right path?
I also know the Vt=Rt*I.
So in a parallel or series or circuit combining the two you would find the Rt (total resistance) by adding all the values together. Then you would plug this value into the equation with the known 5V power supply to give the overall current of the circuit.
From there you can go throughout each resistor and discover the voltage drop by filling in the overall current (discovered from our last formula) and the resistance of that current resistor.
So this tells the amount of voltage drop. In a circuit containing multiple resistors each resistor would have a different voltage drop and the voltage drop over all the resistors would add up to the voltage sourced by the main power supply. But would it be safe to use this voltage drop to be a source to a lower voltage rated device (my gsm module).
i believe the correct term is voltage drop....i may be referring to this wrong. Am i on the right path?
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