Voltage Divider Calculator 3 Resistors. A voltage divider also known as a potential divider consists of two resistances r a and r b connected in series across a supply voltage v in the supply voltage is divided between the two resistances to give an output voltage v out which is the voltage across r b. The user can select the input voltage number of resistors up to 5 and the units for the resistors.
When you start to learn ohms laws and kirchhoff s laws the current divider circuit rule is one which can be derived using above laws. Enter desired output voltage. V out output voltage.
This output voltage which is the voltage that is dropped across resistor r2 is calculated by the formula vout vin r2 r1 r1.
Vout vin x r2 r1 r2 where vout output voltage vin input voltage and r1 upper resistor r2 lower resistor. When you start to learn ohms laws and kirchhoff s laws the current divider circuit rule is one which can be derived using above laws. Calculator version 3 5 2 2003. This resistor value of r2 is calculated by the formula r2 vout r1 vin vout.
