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2024 Mini Christmas Light Expos
Sydney Mini, 1-2 June
|
Perth Mini, 8 June
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Melbourne Mini, 29-30 June
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Brisbane Mini, 27-28 July
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101 display basics
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[QUOTE="JohnsRdChristmas, post: 97543, member: 25823"] Looking to run passed my gutter line setup, as really not sure if im on the right track, And as iv just bought a house, i would rather not burn it down :p I am running some ws2811 60 led per meter strip, which come in 5mtr lengths, I have purchased a ton of Ray Wu's pigtails and extension leads I was going to run 4 lengths of strip, 5mtr, 3mtr, 5mtr, 3 mtrs (so 16mtrs) And power it off a power supply i have got from 3d printers, (240watt, 20 amps ) and i know that these are cheap Chinese PSUs so shouldn't really be run at any more then 75% so 180watt max, ( I have a few of these so can run multiple if need be) Questions: [B]1. - Watts[/B] The strip according to the packaging states maximum power is 36w, ( The packet is for 5mtr roll, so presuming that it is for the roll) but different calculators i have looked around have it at around 50 watts, Do i believe the packet?? if so that is 7.2watts per MTR 7.2watts x 16mtrs = 115.2watts (If thats the case, then im good) [B]2. - Amps (& Fuses)[/B] I have not thought about it until now, but should fuse each of the power lines for safety, in-case water gets in and creates a short, In which case i have ordered some 8 way fuse boards from da-share.com, I cannot find amp specs on for the strip, but have tested myself??? I have put a multi meter (in amp mode) in the power line before a strip (running power through multi meter) On full white it draws between 3 - 3.5 amps, (no power connected at end and the colour does dip a little on white at the end - normally would have power injection at end but for the purpose of the test i didnt) On colours (sample show sequence) it runs around 1.5 - 2.5 amps, [B]My conclusion[/B] Watts - Now giving a bit of room for overhead, im guessing i can in theory run all 4 strips together off the 1 power supply and the power supply should be fine Amps (Fuses and Wiring) If i fuse each power line with a 7.5amp fuse then i should be safe, however not sure how best to connect the strands [B]Can i connect all 4 together like the picture, or do i need to separate it a little, are the fuses effective if there are 5 leeds connected together essentially? Maybe i should be connected only 2 strips together and have power at start, between and end, [/B] Thoughts? I really appreciate all the help and advice, I think i am on the right track but safety is important so best to check, Many thanks Ben [/QUOTE]
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