1. What is a DC Power Supply Calculator?

Definition: This calculator computes the power in watts for a DC electrical circuit based on voltage and current.

Purpose: It helps electrical engineers, technicians, and hobbyists determine the power consumption or generation in DC circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Power (watts)
• \( V \) — Voltage (volts)
• \( I \) — Current (amperes)

Explanation: The voltage is multiplied by the current to calculate the power in watts.

3. Importance of DC Power Calculation

Details: Proper power calculation ensures correct component selection, power supply sizing, and circuit efficiency analysis.

4. Using the Calculator

Tips: Enter the voltage in volts and current in amperes. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula only for DC circuits?
A: Yes, this simple formula works for DC. AC circuits require power factor consideration.

Q2: What's a typical voltage for DC circuits?
A: Common DC voltages include 3.3V, 5V, 12V, 24V, and 48V, depending on application.

Q3: How do I measure current safely?
A: Use a multimeter in series with the circuit, ensuring proper current range selection.

Q4: Does this account for efficiency losses?
A: No, this calculates theoretical power. Actual systems have efficiency factors.

Q5: Can I calculate current if I know power and voltage?
A: Yes, rearrange the formula: \( I = \frac{P}{V} \).