Voltage drop on WS2812s

Other Hardware LEDs and Multiplexing
1

Hi,

I know that there is a lot of similar info on forum, but still asking. I`m using 5m WS2812s 5v 150px strip, power supply is 5V 20A. When i all strip with white color before last px voltage value is 2.5V, before first px voltage is 5V. Is it possible to solve this problem without second power supply?

2

Is it possible to solve this problem without second power supply?

Yes.

The copper strips on the strip's PCB board is quite thin and there is quite a voltage drop when carrying a lot of current.

You solve this by correct wiring. That is apply the power and ground to both ends of the strip, and possibly intermediate points thought the length of the strip.

3

Just run your power to each end of the strip.

LED Strip Power.jpg

FYI, 12V LED Strips are less susceptible to voltage drops because the WS28xx chips on the strip operate internally at 3.5V. (WS2812 Datasheet).

LED Strip Power.jpg

4

Thanks a lot

5

SteveMann:
Just run your power to each end of the strip.

And preferably every 50 LEDs or so as well.