Controlling 30W Pixel Dot

Other Hardware LEDs and Multiplexing
1

I bought a 30W pixel dot from AliExpress and it didn't come with any documentation. It stated that control would be identical to a WS2811 strip. I have no problem connecting my arduino Mega2560 to a ws2811 strip and controlling those LEDs. With the same power and data connections on the 30w pixel dot I am not getting any response from the light. It's clear that there is data being sent. Has anyone had experience working with these LEDs?

led dot
led dot1000×1000 275 KB

2

You will need a power supply capable of at least 30W.

The Mega will not be able to supply sufficient current. 30W at 5V is 6A (plus any LED controller is not 100% efficient).

3

Thanks. The power lines are not connected to the Arduino. The LED requires a 36v input so I'm using an external power supply that can support 10A. The LED will go to full brightness when I disconnect it from the data line so it's getting sufficient power.

4

That's the problem with AliExpress or eBay or the "no name" Amazon sellers. :frowning:

Are there any part numbers on the chips?

5

The model number is RA-WS2811-30W-RGB-36V. There is a number printed on the LED "407050020Z" but searching with it doesn't find anything....

6

I just realized that since I'm not using the power off the Arduino, I no longer have a common ground. Connecting the ground from the LED to the negative terminal of the external power supply fixed my issue.

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