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Hi
I don't want you to take my words as some kind of oracle (it depends on the LED driver how they use the white channel) nor do I give any guarantees but since I use a similar number of LEDs such a setup of the same LEDs will use 10A or less: probably around 30W => 6A but it's better to have a reserve. It would be best if you measured it yourself with a multimeter/inteligent power supply socket and if possible had the possibility of returning the power supply with a replacement for a weaker/cheaper one (but use only branded & high quality ones). sk6812 is very resistant to voltage drops: check at the end of the segment how many volts you have and whether it fits the specification. Then decide if you need voltage injection. |
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on my one segment setup 298LEDs RGBW (96 leds per meter) I have 4.48V in the middle (2 injection points) |
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I have power on the PSU and power connected to the LED strip. I measure 5.19V on the start of the strip. The GND and DATA goes to the Minus and CL terminal on the Plasma 2040 board (which is flashed with the correct firmware). I've checked that the direction of the arrow on the LED strip points the right way (points to the end of the strip). I've installed HyperHDR on Windows:
Added a basic configuration with a static color and with/without screen grabbing, but the LEDs never turn on. Is there anything I'm missing? Logs: |
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Wrong pinout for a single segment: https://github.com/awawa-dev/HyperSerialPico/releases/download/v4.0.0.0/Pimoroni_Plasma_2040.zip => |
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Oh, man I'm stupid, thanks for pointing me in the right direction.
Not sure if just setting the LED to White from the HyperHDR tray will be the max power consumption or if I'm still missing some channels..., but powering 150 LEDS (60 per meter) gives me 4.26V at the end of the strip. It's just under what you said would be recommended (+4.5). It's hard to measure along the strip as I have the epoxy version (personal preference). |
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60 LEDs per meter gives a longer segment than 96 LEDs/meter for 150 LEDs total, and the thin copper traces have some resistance. Maybe that's why? The choice is yours whether to inject current. On the sk6812 it is difficult to see the voltage drop due to the white channel: https://www.youtube.com/watch?v=QnvircC22hU |
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I'm sorry to ask the same question as a lot of other people, but even though I have built an ambilight before using Hyperion a very long time ago, I just want to make sure I get this right migrating to HyperHDR and a (in theory much simpler and nicer solution).
I own a LG C4 77" and figured out it could be rooted. I love the idea to not have to deal with a RPI and video grabber giving that I have a lot of devices and it quickly becomes a hassle to get everything to work well. Using HyperHDR on the TV directly seems just brilliant, so I went along and rooted the TV and got myself some electronics.
This is my general idea on how it's supposed to be connected, I hope I'm not totally wrong on this:
So the Pimoroni RP2040 is connected to the TV using the USB-C port. I plan to split the 5M SK6812 (300 LEDS) into two and have them run in multi-segment mode. Then I connect the data for the first to to CL on the Pimoroni and the data from the other segment to DA. I also have to connect ground from both LED strips to the Minus-terminal (-) on the Pimoroni.
As for the LED strips I just need to connect the 5V and GND to V+ and V- on the BTF power supply. I got the 5V 30A which seems to be perfect for this length as far as I understand. I intend to run some in-line fuses on the V+ line on both LEDS. I also ordered a C13 connector with a built-in fuse.
Lastly I intend to print a 3D case for the whole thing based on this design:
https://www.printables.com/model/814436-btf-lighting-a24v10a-psu-case-controller-mount
I like cables to be easily detachable. The C13 makes the 240V detachable while I intend to use XT60 connectors for the V+/V- and some two pin JST connectors for the Data/GND to the Pimoroni.
Questions:
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