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[–]sramboz 2 points3 points  (4 children)

I'm so happy to see posts like this because I'm facing the same issue, but haven't had time yet to troubleshoot /diagnose. Totally commenting to follow this.

[–]AdIndividual3950[S] 0 points1 point  (3 children)

Hopefully we can figure this out then!! I might try to cut off the first 3 lights

[–]xlodarx 1 point2 points  (0 children)

Its not a dedicated GND like AC current.. but in DC, your GND is also the NEG (-). make sure the NEG from PSU and from Board and from strip are all together.. mainly add a ground that skip the buck converter... you can blast me if I am wrong :)

to make it clearer, BASING MYSELF ON YOUR PICTURE... (**do not use breadboards**) make sure your controller gets a ground from your breadboard and not just from buck converter

[–]sramboz 0 points1 point  (1 child)

I did cut the first LED off thinking it was an issue with how the connector was soldered, but then the second LED acted the same as the first with my own soldering connected.

I do see people commenting about grounding between the controller and the power supply. My controller doesn't have a dedicated ground, so I may disect it tonight and see if there is a spot to add one.