Hey everybody, glad to see Applefritter's back up and running
I'm trying to figure out the easiest and/or most efficient way of deriving a 5 volt supply from the 12 volt supply present in a car. Normally I'd just use a simple 7805 circuit, but that's not going to cut it considering I want to power a Pentium 75 motherboard and HDD.
I suppose a switchmode PSU of some kind would be the best solution here, but that adds greatly to the complexity of getting it working.
I have also considered a simple potential divider using two resistors, but that might be tricky as the resistance of the load is relatively unknown here.
Any ideas, EE majors etc ?