Method to make LED strips fade on and off?

[King Mustard]

I have some LED strips (they have a red and black wire coming out of them) that I want to mount in my Peugeot 308 (2012)'s footwells.

I intend to get them hooked up (I wouldn't know how to do it) to the interior light, so that when the car door opens, the LED strips come on with it.

However, all of the lights inside the cabin fade on and off. The strip does not fade.

Is there a method (is it a box I'd buy online?) that would make the LED strips fade on and off?

 

[telectrix]

muddy boots to fade. cillit bang to brighten..

 

[rsgaz]

LED Dimmer | Fade-in Fade-out LED Dimmer from Oznium - https://www.oznium.com/led-controllers/fade-in-fade-out

 

[King Mustard]

LED Dimmer | Fade-in Fade-out LED Dimmer from Oznium - https://www.oznium.com/led-controllers/fade-in-fade-out

Have you fitted one of those yourself?

 

[rsgaz]

Have you fitted one of those yourself?

No, sorry. They have a few videos on YouTube though that might help if you scroll down.