I do simple stereo AV work for friends for $ sometimes and I'm working on a project a buddy wanted to put into action on his S197
Apologies if this sounds strange but basically he wants ambient interior lighting that dims and brightens based on his RPMs - clearly this will be something he can turn off at will as it's kind of gimmicky, but it's a custom thing he wanted to do for fun at the track.
Here's my question. We have a lighting controller module that we're using for this that takes an input voltage that will control the brightness where 5V is the highest brightness, and 0V is no light at all.
Where would be the best place for us to tap power that will go with the RPMs, and if that power goes past 5V, what would be the best way to attenuate that power source down to 5V at maximum?
Ideally we want to deliver the full brightness (5V) at 7K RPM.
Thanks and hopefully some of you may have some pointers to put us in the right direction