i made it such that the lights activates when you unlock your car with the remote or key. and slowly fades down when you lock the car after closing the door.
the project is very simple. but lots and lots of time is invloved if you want a good result.
the car i used for this project was a Honda Civic, which is my bothers.
the idea of this project is to produce underbody lights while keeping the price to minimum.
retail shops sell 24led sticks for 40$ (something stupid like that). i am using 108 leds i got for about 10-15$
before u actually start this. please read through the instructable carefully. see if you are confident with your abilites because I take no responsiblity for you if u blow fuses, screw the car up, etc, so do this at ur own risk. also im not responsible if u get pulled over by the cops if u do stupid things with these lights. eg turning it on constantly when driving. so once again. i take no responsiblity whatsoever. i provide the information, ideas and instructions while its up to u if u want to follow laws, instructions etc.
i dont know if anyone has already made instructables on this. but this project's idea is 105% original from me. i have not copied from different sources or whatever. if you have a similar project, it is a coincident. i am happy to link ur instructable as a "see also" or something similar if u want to.