1. What is an LED Power Supply Calculator?

Definition: This calculator determines the minimum wattage required for a power supply to safely operate multiple LEDs with a 20% safety margin.

Purpose: It helps electronics enthusiasts, lighting designers, and DIYers select the appropriate power supply for their LED projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{supply} \) — Required power supply wattage (watts)
• \( P_{LED} \) — Wattage of each individual LED (watts)
• 1.2 — 20% safety margin factor

Explanation: The total LED wattage is calculated and then increased by 20% to ensure the power supply isn't operating at maximum capacity.

3. Importance of Proper Power Supply Sizing

Details: Undersized power supplies can overheat and fail, while oversized ones may be unnecessarily expensive. Proper sizing ensures longevity and safety.

4. Using the Calculator

Tips: Enter the number of LEDs and the wattage per LED. The calculator will automatically add the 20% safety margin.

5. Frequently Asked Questions (FAQ)

Q1: Why is a 20% safety margin recommended?
A: The margin prevents power supply overload, accounts for voltage fluctuations, and extends the power supply's lifespan.

Q2: Should I round up the calculated wattage?
A: Yes, always choose a power supply with equal or higher wattage than the calculated value.

Q3: Does this account for voltage requirements?
A: No, you must also ensure the power supply's voltage matches your LED system's requirements.

Q4: Can I use this for LED strips?
A: Yes, if you know the total wattage of the strip (usually provided per foot/meter).

Q5: What if my LEDs have different wattages?
A: Calculate each type separately and sum the results, or use the highest wattage in your calculation for safety.