For my project I need a lot of analog inputs that are driven by 12V. Usually that would involve a voltage divider for each input.
I’ve come up with the idea to use a analog multiplexer to switch the input before stepping it down to 3v levels. But most multiplexer IC’s cannot cope with large analog voltages. I would be needing a multiplexer that handles 3.3v digital pins select drive the 12v analog input.
But maybe this would work? : http://uk.farnell.com/jsp/displayProduct.jsp?sku=9664548&CMP=e-2072-00001000