{primary_keyword}
Quickly estimate the power consumption and required supply for your WLED LED strip projects.
{primary_keyword} Calculator
| LED Count | Total Current (mA) | Total Power (W) | Estimated Runtime (h) |
|---|
What is {primary_keyword}?
{primary_keyword} is a tool used by hobbyists and professionals to determine the electrical power requirements of LED strips controlled by WLED firmware. It helps you size power supplies, batteries, and wiring to ensure reliable operation without voltage drop or overheating. Anyone building a light show, decorative lighting, or interactive installation can benefit from a {primary_keyword}.
Common misconceptions about {primary_keyword} include assuming that all LEDs draw the same current regardless of color or brightness, or neglecting the impact of long cable runs on voltage drop. A proper {primary_keyword} takes these factors into account, providing realistic estimates.
{primary_keyword} Formula and Mathematical Explanation
The core formula behind the {primary_keyword} is straightforward:
Total Current (mA) = Number of LEDs × Current per LED (mA)
Total Power (W) = Total Current (mA) × Supply Voltage (V) ÷ 1000
Estimated Runtime (h) = (Battery Capacity (mAh) × 0.9) ÷ Total Current (mA)
We multiply by 0.9 to account for the fact that only about 90 % of a battery’s capacity is usable in practice.
Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Number of LEDs | Total LEDs in the strip | count | 1 – 5000 |
| Current per LED | Average current draw per LED at full brightness | mA | 30 – 80 |
| Supply Voltage | Voltage of the power source | V | 5 – 12 |
| Battery Capacity | Capacity of the battery pack | mAh | 500 – 20000 |
Practical Examples (Real-World Use Cases)
Example 1: Small Ambient Light
Inputs: 30 LEDs, 60 mA per LED, 5 V supply, 2000 mAh battery.
Calculations: Total Current = 30 × 60 = 1800 mA; Total Power = 1800 × 5 ÷ 1000 = 9 W; Estimated Runtime = (2000 × 0.9) ÷ 1800 ≈ 1 h.
Interpretation: A 9 W power supply is sufficient, but the battery will only last about an hour at full brightness.
Example 2: Large Installation
Inputs: 1500 LEDs, 60 mA per LED, 5 V supply, 10000 mAh battery.
Calculations: Total Current = 1500 × 60 = 90000 mA (90 A); Total Power = 90 A × 5 V = 450 W; Estimated Runtime = (10000 × 0.9) ÷ 90000 ≈ 0.1 h (6 min).
Interpretation: Such a setup requires a robust 450 W power supply and a much larger battery for longer operation.
How to Use This {primary_keyword} Calculator
- Enter the number of LEDs in your strip.
- Specify the average current draw per LED (check your LED datasheet).
- Set the supply voltage (5 V for most WS2812B strips, 12 V for others).
- Optionally, provide your battery capacity to see estimated runtime.
- The calculator updates instantly, showing total current, power, and runtime.
- Use the highlighted result to select an appropriate power supply.
Key Factors That Affect {primary_keyword} Results
- LED Type: Different LEDs have varying current draws.
- Brightness Level: Full white consumes maximum current; colors use less.
- Supply Voltage: Higher voltage reduces current for the same power.
- Cable Length & Gauge: Long runs cause voltage drop, requiring higher supply voltage.
- Battery Health: Older batteries deliver less usable capacity.
- Ambient Temperature: High temperatures increase resistance, affecting current.
Frequently Asked Questions (FAQ)
- Can I use the calculator for 12 V LED strips?
- Yes, just set the supply voltage to 12 V and provide the appropriate current per LED.
- What if I don’t know the current per LED?
- Typical values are 30 mA for low‑power LEDs and 60 mA for standard WS2812B LEDs.
- Does the calculator consider voltage drop?
- It provides a baseline; for long runs you may need to increase the supply voltage or add power injection points.
- Why is my estimated runtime so short?
- LED strips draw a lot of power; you may need a larger battery or reduce brightness.
- Can I copy the results?
- Click the “Copy Results” button to copy all key values to the clipboard.
- Is the calculator accurate for all colors?
- The calculation assumes full white (maximum current). Other colors will consume less.
- Do I need a fuse?
- For high‑current setups, a fuse protects the power supply and wiring.
- How often should I recalculate?
- Whenever you change LED count, voltage, or add new sections to the strip.
Related Tools and Internal Resources
- {related_keywords} – Detailed guide on wiring LED strips safely.
- {related_keywords} – Battery selection tool for LED projects.
- {related_keywords} – Voltage drop calculator for long runs.
- {related_keywords} – Power supply sizing worksheet.
- {related_keywords} – LED color temperature comparison chart.
- {related_keywords} – FAQ on WLED firmware configuration.