Hello all. I am trying to use a string of addressable 3W LED modules (Adafruit Pixies), but it is a long run and a lot of pixels. I am concerned about getting my sums and circuit design right, perhaps you can help?
The circuit diagram and notes attached should sum it up, but note that what looks like a 78xx 5V regulator should actually be a 5V buck converter.
My questions are:
Does my design look sensible and are my calculations correct (bearing in mind I am short of time/funds!)?
Do I need cables and connectors rated for 25A in this scenario? It is quite unlikely it will draw that much, but I want to prepare for the max.
Am I right in thinking that if I use a 600W SMPS with a 24Vdc 25A output from a 240V AC UK mains socket, then the max input current is well within the 13A available? 600/240 + some = 3A odd?
The Pixies have a thermal cut out and I have some heatsinks I can use if necessary, but will anything else get hot in this scenario?
Many thanks if you can help.