Hi all,
I'm new at this game and looking to use a PIC in an automotive application. I want to have 4 input pins monitor the "state" of 4 different automotive lamps - either ~0V or +13.8V (off/on).
How can i effectively do this with a PIC? Can I use the digital inputs and just read if they are 0 or 1? Would false triggering be a problem with the PIC? At what voltage level does a digital input read 1 on a PIC?
I figure I have to limit the input voltage to <5V, so how can I effectively do this? I guess I can use a simple voltage divider, but then again, I'm monitoring 4 different lines, so maybe placing the ground of the PIC at +9V with a positive regulator will do the trick? This way the voltage would be only +4.8v on the input pins right?
Thanks in advance for your input!
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