(1) I assume the data line needs all the leds in series i cant have 8 branches from the middle to each led strip ? But i could do this with the expander board.
(2) Also wondering about power orginally i was going to run the power and from the center in two cables and then split off the connection for each stick as you go along. However this makes it more complicated and i can’t work out the power / voltage drop using the spiker tool.
In order to have neat wiring i would need loads of different core wires like 6 core ( 4 data and 2 power ) to the first led tube then 5 core to the next seems hassle.
(3) Can i use the expander board and the sensor board at the same time ?
I think i have mostly answered my own question in that i need the expansion board and each tube should have its own power running direct from the PSU. Just wanting to see if any smarter minds have any good ideas.
Each light stick is 1.5m long using ws2811 at a density of 60 led / m. So drawing 27w at 12v.
One way to get the data to go as far as possible is to use an ethernet cable. Downside is that it’s no good for power. If you ran 1 cable for power, and ethernet for data it would work. Not as clean as having one cable for both though.
It’s hard to know how long you can go before your first pixel, but I’ve had success with 20-40 feet. My experience is with pixel strings though, not strips.