I am planing to make a 20m long led strips, and I am looking at this 5m, 60 leds/m 12V WS2815. The reason for a 12V strip is simply because I don't want to deal with power injection given that I am not good with electricity at all.
Each led roughly requires 50mA(information from internet), so a 5m 60 leds/m strip requires 50mA * 300 = 1.5A current and to run 4 strips, that would mean 1.5A * 4 = 6A.
1. Am I looking for a power supply with at least 10A, for extra buffer and safety?
I am having difficulty deciding what power supply to buy. Here are the options I am looking at
And here is a schematic design I have come up with.
- I am especially concern about the 15m long wire that will run all the way to the last strip. I feel it is way too long.
- Do I need some MOSFETs?
- How do I actually joint the strips together? That is, how do I connect the red dots? is it by soldering or using some kind of connector?
- I guess I cannot simply connect the positive end of each strip in the same way that I do for the negative ends. It will introduce voltage dropping.