Re: Protection Circuit
currently regulated via a linear 7805 regulator
yuk , try a R-78E5.0-0.5 . no heat : - 92% efficient , pin compatible 7-28v input . try one ,you will never go back to nasty hot wasteful linear regs.
I would use a fuse for the lights and just protect the 5v reg and its circuits, the body diodes of the lighting mosfets will blow a fuse nicely .
better still get the pic to operate a 12v load relay when its had a look around and made sure everything is nice after power-up
Warning I'm not a teacher
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