OK I don't really get it. I'm a total novice. Please don't hesitate from answering because of this. But I made the 'mistake' of buying some WS2812B LEDs in a strip. In fact the strip I bought can be found here: http://www.ebay.co.uk/itm/301594683845?_trksid=p2057872.m2749.l2649&var=600482212270&ssPageName=STRK%3AMEBIDX%3AIT
I bought an Arduino Uno from here: http://www.ebay.co.uk/itm/171518348792?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT a 5V 2A power supply from here: http://www.ebay.co.uk/itm/171279744317?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
And a nice perspex box to put it in.
However this is the point where I get lost.
I have tried to follow the tutorial from here: [COMPLETED with TUTORIAL] Ambilight - Atmospheric lighting behind your TV/Monitor - Home Theater Equipment - Linus Tech Tips
and have become a little confused by this image: http://i.imgur.com/4GjqN8e.png
This appears to show that the blue - and red + from the power supply are connected to the LEDs themselves and not to the Arduino? Is this correct? Also what is the little green connector 'thing' that's connected to the power supply and where can I get one of these? Presumably it's purpose is to make connecting the LEDs to the power supply simpler without the need to strip and solder cables together.
I read this forum post: https://forums.adafruit.com/viewtopic.php?f=47&t=49537 which said I could use the WS2812B LEDs I bought and that I should 'use' the FastLED scrip specifically mentioned in this post on that thread: Adalight and WS2812B - adafruit industries
However the one significant difference is that I'm using an Uno and he's using an Arduino Nano (I think?) Is this code compatible with an Uno, or if not, is there any way to make it compatible?
Also what software exactly do I need? I'm sure I can work out from tutorials how to upload software to the Uno, but is the FastLED script all I need, or do I need to upload, or do anything else?
Also I bought these strip to strip connectors to give me some placement flexibility: http://www.ebay.co.uk/itm/180896644981?_trksid=p2057872.m2749.l2649&var=480153210401&ssPageName=STRK%3AMEBIDX%3AIT
Are these compatible? Will they work? Do the LEDs need to be stripped of any protective plastic coating in any way to make them work?
Any help would be much appreciated.