Science Sunday: RGB LED Power Consumption Calculator
June 7th, 2020
192 words · 1 minutes read
Before delving much-too-far down the rabbit hole of flashy, over-engineered lamp repairs and Arduino funtimes, I thought it advantageous to take an educated guess at the maximum power consumption of replacing some existing LEDs in a friends now-exploded lamp with WS2812 “NeoPixel Stick“ clones.
| Num. LEDs | {{ bgcolor }} | ||
|---|---|---|---|
| Red mA | Green mA | Blue mA | Max mA |
| {{ out.rgbMa }} | |||
| Red % | Green % | Blue % | Total Bright. |
| {{ out.totalBrightness | toFixed(2) }}% | |||
| Red Val | Green Val | Blue Val | |
| {{ out.redVal }} | {{ out.greenVal }} | {{ out.blueVal }} | |
| Power Usage | |||
| mA | A | Volts | Watts |
| {{ out.ma | toFixed(1) }} | {{ out.amp | toFixed(3) }} | {{ out.watts | toFixed(2) }} | |
This calculator is not super-scientific.
- There may be some inconsistencies due to rounding of values.
- Even if you have all LEDs at 0% brightness, some power will still be used (though minimal).
- I doubt (though have no proof) that the relationship between
percentage brightnessandpower consumptionscales linearly.
On the off-chance you hate JavaScript, or would just prefer an offline version of this calculator, you can download an Open/LibreOffice or Excel spreadsheet version.
There’s also a copy available on JSFiddle if you want to have a tinker.
Posted in: Science Sunday, Tech