I like these strips for basic WS2812 LEDs. I had no trouble connecting several of these and ran them at different intensities for several days with no issues. PCB solder pads Ground, VCC, DataIn on one end and Ground, VCC, DataOut on the other end. There is also another ground connection at each end in the form of a 4th solder pad. Each strip has two mounting holes between some SMD resistors, with enough room for a screw head - I suggest nylon for safety. 3.3v is required as the 5v connection doesn't work - it may not be the strip but my wemos. I can try a 5V capacitor as some suggest (before the first LED). to see if that helps. If I notice any changes over time I will update this review.
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