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2024 Mini Christmas Light Expos
Sydney Mini, 1-2 June
|
Perth Mini, 8 June
|
Melbourne Mini, 29-30 June
|
Brisbane Mini, 27-28 July
New to Christmas lighting?
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AusChristmasLighting 101 Manual
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[QUOTE="Skymaster, post: 133796, member: 36626"] I really dislike throwing the conversion into watts in there. It adds no benefit to the calculation and starts involving the voltage, which is irrelevant when calculating the power supply size. Work in amps, and use the amp rating from the data sheet of the PSU. The WS2811 chip is designed to deliver 48mA at full white to an LED, no matter the voltage. This is of course assuming that it is able to (Wire resistances and 'resistor' pixels with too-high resistors will limit this, and therefore derate it accordingly). One other thing to note as well is that there's a huge mistake made as well in the spreadsheet above - which is the assumption that a Meanwell LRS-350 is a 350W power supply. That's just the model range, which is [B]typically[/B] 350W at the higher voltages. But at 5V, it's only 60A, if you look at the data sheet. The AliExpress Chinese no-name ones will state they are a 70A PSU explicitly. That said, whether they perform that high is another matter. [/QUOTE]
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The title of our introductory lighting manual contains a three digit number. What is that number? Clue: Display basics forum
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