nutz4lights
Full time elf
So, I was sitting around thinking about this today and realized that the fuse value on the power injection lines is not exactly a cut and dry element. Here is my setup:
350W power supply > P12R/S > 12 outputs with 100 WS2811 pixels on each connected to pixel one
<same ^^> > two separate wires > Bussman in-line fuse > each wire split to 6 power injection lines that are connected at pixel 100
Let me know if that doesn't make any sense.
By my measurements on these pixel strings, each of the 100 pixel outputs will draw 2.8A using white light (only around 2.0A with any of the colors) with 1/2 of that provided by the direct output from the P12R/S and the other 1/2 coming from the power injection line connected to each string at pixel 100. Since I wire-nutted six of the power injection lines to one Bussman in-line fuse, that should mean that the maximum current draw on each of the two power injection lines coming out of the power supply will draw around 8.4A, right?
Now the question... what fuse would YOU use in that in-line fuse holder. It came with a 20A fuse, I picked up some 10A fuses... part of me feels like the 10A would be cutting it too close... So, what say ye?
If I look at the P12R/S, they have each output protected with a 7.5A blade fuse and each group of six outputs protected by a 30A blade fuse. If I go by that logic, even the 20A fuse that came with the fuse holder wouldn't be high enough...
Thanks for the discussion...
350W power supply > P12R/S > 12 outputs with 100 WS2811 pixels on each connected to pixel one
<same ^^> > two separate wires > Bussman in-line fuse > each wire split to 6 power injection lines that are connected at pixel 100
Let me know if that doesn't make any sense.
By my measurements on these pixel strings, each of the 100 pixel outputs will draw 2.8A using white light (only around 2.0A with any of the colors) with 1/2 of that provided by the direct output from the P12R/S and the other 1/2 coming from the power injection line connected to each string at pixel 100. Since I wire-nutted six of the power injection lines to one Bussman in-line fuse, that should mean that the maximum current draw on each of the two power injection lines coming out of the power supply will draw around 8.4A, right?
Now the question... what fuse would YOU use in that in-line fuse holder. It came with a 20A fuse, I picked up some 10A fuses... part of me feels like the 10A would be cutting it too close... So, what say ye?
If I look at the P12R/S, they have each output protected with a 7.5A blade fuse and each group of six outputs protected by a 30A blade fuse. If I go by that logic, even the 20A fuse that came with the fuse holder wouldn't be high enough...
Thanks for the discussion...