July 23, 2009
about a year ago
I’ve had WS2811 strips (predecessor of the WS2812) from different suppliers in the past and each had a different weight copper on the flex PCB. In the thinnest weight there was a noticeable change in colour along the strip when they were all set to white. I ended up running some thicker cable along size the strip and tacking it to +5V and Gnd every 50cm or so. It would be nice to know the copper weight and trace dimensions of these boards so that the voltage drop over 5m can be calculated. I also wonder how these insulated strips would handle heat dissipation (mine were not insulated).
That said, the strips are great if you’re using them for animated feature lighting where you don’t have to run them at full brightness.
Edit: apparently the WS2811 is the constant current controller in the WS2812 LED module.
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