Power Requirements for Dumb String

[EmmienLightFan]

I am going to have some singing faces this year, and I will be using 12v dumb RGB strings.

 

How much power does each string need? I guess it is similar to 12v pixels, but I have never used them either.

[Ebuechner]

Assuming you're trying to use nodes. Red: 28ma (2.730 amps per 100 nodes)
Green: 15ma (1.485 amps per 100 nodes)
Blue: 15ma (1.5 amps per 100 nodes)
White (all three colors): ~60ma (5.7 amps per 100 nodes

[EmmienLightFan]

3 hours ago, Ebuechner said:

Assuming you're trying to use nodes. Red: 28ma (2.730 amps per 100 nodes)
Green: 15ma (1.485 amps per 100 nodes)
Blue: 15ma (1.5 amps per 100 nodes)
White (all three colors): ~60ma (5.7 amps per 100 nodes

That seems incredibly high. Are you sure about that?

How much is a 5 volt node?

That means that 100 nodes use 68 watts.

[k6ccc]

For dumb strips remember that with 12V devices, you generally have three RGB LEDs in series so that 60mA (for full white) is for three RGB LEDs.

 

With smart strip, 12V strips generally also have three RGB LEDs for each chip, and so again the 60mA for full while is for three LEDs.  With 5V pixels or strips, there is normally one RGB LED per chip, so the 60mA is for a single RGB LED.  With 12V pixels, it can go either way.  If it's a single RGB LED per chip, there is a lot of voltage thrown away in voltage dropping resistors.

 

[Ebuechner]

Those numbers came directly from the holiday Coro website.

[EmmienLightFan]

Oh, Okay. Thanks

Does the singing faces bit on this spreadsheet look correct?

https://drive.google.com/file/d/0B6dCx7Jc8zNnZFJrTVY1cDlYWlE/view?usp=sharing