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swizzlevixen / kilaueacove

Code, diagrams, and other elements for my screening room and tiki bar themed environment
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Distribute power more evenly to Pixels #3

Open swizzlevixen opened 8 years ago

swizzlevixen commented 8 years ago

Distribute power individually to each shelf, so that we get better voltage and truer colors to more pixels.

Pixels require 60 mA / pixel for full white, and 20 mA for “average” rule-of-thumb use.

Pixels Rule of Thumb Max
1 NeoPixel or WS2801 Pixel 20 mA 60 mA
41-pixel Strand 820 mA 2.46 A
All 6 Shelves (5 * 41 + 39) 4.88 A 14.64 A
50-pixel WS2801 Strand 1 A 3 A
16-pixel Volcano Ring 320 mA 960 mA
3 Arcade Button NeoPixels 60 mA 180 mA
TOTAL 6.26 A 18.78 A

So, probably what I need is a 5A supply per shelf, plus another 5A for the WS2801 pixels. (4 × 5A)

Of course, this doesn't take into account the max from the wall circuit (15A, probably), or the max supported by the power strip (something less).

Maybe I could limit the output in software to keep the total under the 15A max (minus, of course, RPi power, fog machine power, fan power, etc.).

swizzlevixen commented 8 years ago

I wasn't thinking about the power conversion for the mains circuit. 10V at 5A only draws 120V at 2A, according the the 5V/10A power supply I got from Adafruit, so that doesn't add up to something that would overload the mains circuit.

swizzlevixen commented 8 years ago

AmazonBasics power strip currently in use will support:

AC 15A, 125V, 60Hz, 1875W