This is my first arduino project and I am planning on doing something with an 5v 4m led strip. I have to use a power source that is capible of giving my led strip enough current to light my leds up with white light at almost/maximum brightness. If I am correct than that shout use around 12a. The problem is that there are pretty much no power supply's available for this high current or they are very expansive. I have read something about dc-dc adapter that increase in current and and decrease tour voltage but I am not so familiar with that yet. Hopefully someone can explain this to me.
A DC to DC converter that can handle that sort of current is way more expensive that a power supply that will give you the current you need at the voltage you need.
That is not how you post pictures here, see this image guide
What do I think of it, well not much.
You have no large capacitor on the 5V supply and no resistor in the data line. I also assume you are not going to plug the Arduino into a USB socket while you have the LEDs attached, because then you would have two 5V supplies connected together and that is not a good thing.
So I was wondering if that was the good circuit for that.
But the thing is he did not use resistors and capacitor but it did work
So I don't really see the meaning of these resistors.
Sorry, I just said something stupid I'm just a beginner.
By the way, the installing begins at 4:45