400,000+ twinkly lights
- Oct 16, 2016
- Christchurch, New Zealand
The ws2811 chip can do both speeds (taking pin7 high puts it in slow mode)
The motivation always seems to be a cost saving exercise (remember the old 3 wire to to 2 wire lights) so whatever they have done would have to be cheaper than just running a return data wire or running them in a zigzag pattern.
Extra circuitry on the first pixels should be visible.
Can you take a close up photo of the first pixel on either the second or third string.
I don't believe the ws2811 is reprogrammable outside the factory and imagine how messy it would be from a QC point of view ensuring you solder a different 1st pixel for each string to shift or ignore the data of the the preceding string(s)
There's no obvious circutry on any of the pixels, they all look similar - all the same size physically etc. A photo won't show much as they're potted in white frosted resin and you can't see anything, and sorry I don't want to destroy the resin as I want to still use this light set.