Hi just wondering if anyone can help, im trying to sort out some security for my land rover, a friend i know built a circuit when he was in school many years ago that needed a combination of inputs, eg in my land rover i would need to press the brake, indicate left then flash the lights before i could start it, only problem is he cant remember what he used, said it was a chip of some sort but cant remember the name. Any ideas what this is? and how i could go about building the circuit board or whatever? sorry in advance im not good with this sort of thing. thanks Chris