Parallel port -> Various Car functions
I was just reading the radio thread where someone asked it were possible to have their power aerial extend when they turn the radio on (typically the function of the blue wire on a car head unit)
I have been wondering about an unrelated but similar feature, to have the screen dim be controlled by my switching the car's lights on (this is controlled by the orange wire on a head unit)
I am not sure what other features people can come up with, but these two at least could easilly be controlled by the parallel port. You'd just need to build 12V<-->5V transformers so you don't blow up your motherboard.
Do you think it's worth coming up with some kind of open standard for these functions that CF and other front ends can support, presumably then some people can sell pre-made LPT->ISO leads to those who don't want to make their own