1. What is a Voltage Divider with 3 Resistors?

Definition: This calculator determines the output voltage (V_out) in a voltage divider circuit with three resistors in series, given the input voltage and resistor values.

Purpose: It helps electronics engineers, hobbyists, and students design and analyze voltage divider circuits with three resistors.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V_{out} \) — Output voltage (volts)
• \( V_{in} \) — Input voltage (volts)
• \( R1, R2, R3 \) — Resistor values (ohms)

Explanation: The output voltage is proportional to the ratio of R3 to the total resistance in the series circuit.

3. Importance of Voltage Divider Calculation

Details: Accurate voltage division is crucial for creating reference voltages, biasing transistors, and interfacing between different voltage level circuits.

4. Using the Calculator

Tips: Enter the input voltage and all three resistor values. R1 and R2 can be zero (for simpler dividers), but R3 must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What if I only have two resistors?
A: Set R1 or R2 to zero to convert this to a standard two-resistor voltage divider.

Q2: Does resistor order matter in the circuit?
A: Yes, V_out is measured across R3, so the resistor positions are significant.

Q3: What's the maximum current through the resistors?
A: I = V_in / (R1 + R2 + R3). Ensure resistors can handle this current.

Q4: How accurate is this calculation?
A: This is theoretical. Real-world factors like resistor tolerance and load effects may alter results.

Q5: Can I use this for AC signals?
A: Yes, for low frequencies where capacitive effects are negligible.