I have a series of 20 led strips hanging down, each with 90 (30 groups of 3) 12V ws2811 leds. For a variety of reasons, it makes more sense in my application to have a dedicated data pin for each of the strips at the top.
1 - Is there a limit to the number of data pins I could use on the Mega? Are any pins off limits?
2 - How much power is required for the data pin only? Presumably not much, but just want to double check. Is a resistor between the arduino and data line recommended?
3 - I'm trying to look into the setMaxPowerInVoltsAndMilliamps function, but I can't tell if having each strip on a separate line would be an issue, or if the function includes all led strips controlled by the library.
I have two 30 amp power supplies that will be plugged in at opposite ends of my strip "start" points at the top. Obviously this is not enough if all of the lights decide to go white at once. I don't intend for that to happen in my code, but it'd be good to have the setMaxPower function in place just in case.
Thanks in advance for any help.