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Voltage Divider Calculator
Input voltage from the battery and the value of two resistors of different resistance to find the output voltage of the circuits.
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Voltage Divider Calculator
Voltage Divider Calculator is used to find the output voltage of the voltage divider circuit.
What is the Voltage divider?
A voltage divider is a simple circuit that consists of two resistors connected in series with the voltage battery to find the output voltage of the circuits. It is commonly used to obtain a desired output voltage from a given input voltage.
Formula of the Output Voltage:
The output voltage (Vout) of voltage divider circuits can be determined using the below formula.
Vout = (Vin × Rb) / (Ra + Rb)
Where,
- Vout = out-put voltage series circuit
- Vin = input voltage of the series circuit
- Ra = value of the first resistor (in ohm)
- Rb = value of the second resistor (in ohm)
How to evaluate the output voltage?
Example 1:
Let's assume we have two resistors, resistor one with a value of 4 kilohms (kΩ) and resistor two with a value of 6 kilohms (kΩ). Suppose the input voltage (Vin) of circuits is 12 volts then calculate the output voltage (Vout) using a voltage divider circuit.
Solution:
Step 1:
Write the data from the above conditions.
Vin = 12 volts, Ra = 4 kΩ, Rb = 6 kΩ, Vout=?
Step 2:
Write the formula of the voltage divider.
Vout = (Vin × Rb) / (Ra + Rb)
Step 3:
Substitute the values into the above formula.
Vin = 12, Ra = 4, Rb = 6
Vout = (Vin × Rb) / (Ra + Rb)
Vout = (12 ×6) / (4 + 6))
Vout = (12 × 6) / (10)
Vout = 72/10
Vout = 7.2 volts
Example 2:
Let's assume we have two resistors, resistor one with a value of 3 kilohms (kΩ) and resistor two with a value of 1 kilohm (kΩ). Suppose the input voltage (Vin) of circuits is 9 volts then calculate the output voltage (Vout) using a voltage divider circuit.
Solution:
Step 1:
Write the data from the above conditions.
Vin = 9 volts, R1 = 3 kΩ, R2 = 1 kΩ, Vout=?
Step 2:
Write the formula of the voltage divider.
Vout = (Vin × Rb) / (Ra + Rb)
Step 3:
Substitute the values into the above formula.
Vin = 9, Ra = 3, Rb = 1.
Vout = (Vin × Rb) / (Ra + Rb)
Vout = (9 × 1) / (3 + 1))
Vout = (9 × 1) / (4)
Vout = 9/4
Vout = 2.25 volts
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