hello, i posted a question a few months ago about erratic ws2812 leds. well, finally got time to trace that down and it came down to a garbage power supply. anways.
i am basically animated 5 xmas candy canes for the yard. my question is can i split the signal wire off to control them (they all do the same sequences) or is there a problem doing so?
i tested it out with 2 strands (of 27 leds each) and it did work but i dont know if its really a problem to do that or not. running off a UNO or Nano, probably the Nano in the end.
Yes you can run multiple strings of pixels from the same processor, just use different pins. Ensure you have a seriese resistor and capacitor for each string.
You should be able to run multiple strings from the same pin on the processor to display identical information.
You would use a separate 470 Ohm resistor in series with each string input, as per the instructions.
I presume Mike is referring to the capacitor across the power input to each string, not of course, the data line.
If however, you are operating them at a distance, as in the yard, you will need to provide a buffer, such as a 74HC14, at each NeoPixel strip to condition the signal for that strip and to drive the line to the next. (Pairs of inverters in the 74HC14.)