Hello!
I am running a LS-4P flashed with WLED 0.14.0-b1 with a 5V 50W 10A power supply , driving a reel of WS2812B 5V LEDs with 300 LEDs in the strip. According to the data sheet this reel when run at 100% brightness , color white should pull 65W and 13A if the WLED limiter is turned off.
When I wired it up and ran it I took measurements. I found that at 100% brightness, no WLED limiter I measured a voltage drop of 2.93 volts and had visual indications of voltage drop , but it was only drawing 1.57A and 7.85W. I am not sure why this is happening unless the LS-4P has some kind of limiting built in. I have shared this with people on the WLED discord and they are equally puzzled.
I realize that I need power injection to make this run work properly, but I do not understand why it is drawing only 1.57A from a 10A power supply.
Any suggestions ?
Here's what I ended up with. I'm a little surprised to see only 1.3A being drawn at 100% brightness and white. Does this seem unusual to you ?
There is no limitation in our controller, the real reason should be the PCB of strip caused a voltage drip a lot.
https://www.athom.tech/blank-1/wled-esp8285-ws2812b-kit on the bottom of this link is the result of we have tested:
Due to voltage drop, the actual power output of this strip at full brightness is 28W. To achieve equal brightness along the entire length of the strip, we recommend using high-quality wire (not included) to inject power at both ends, which requires a total power input of 42W
Yes, you have to power inject. There is a certain amount of loss in any transmission medium, including the wires you connect, which is obvious if your wires are too long or of poor quality. We recommend using high-quality wires, of course, using high-voltage light strips, such as 12V light strips is a better choice
Actually our test results are similar to yours, we were also confused when choosing power supply for our wled controller kit