My project is to be used on an old 1949 Ford tractor. Incredible performance of 0-60 in about 3 weeks
The unfortunate thing is the ignition system is so noisy that a radio will pick up the interference from about 5 yards away, but I want to use a micro-controller!
I read the National Semiconductor voltage regulator handbook from 1980 which gives an automotive tolerant circuit using an LM2930, which is now obsolete as is a rarity. But looking at substitute LDO regulator IC's it seems to be far cheaper to use a $1 DC to DC EBay convertor that build the circuit from scratch.
So here's what I'm thinking. Keep the DC to DC convertor in a separate enclosure from the microcontroller, add extra caps before and after the convertor, with a 36 volt TVS as a precaution. Set it to output 8 volts and put a regular 7805, with the datasheet suggested caps, on the shielded microcontroller board.
Will this be enough to keep the microcontroller happy and not constantly resetting?
The unfortunate thing is the ignition system is so noisy that a radio will pick up the interference from about 5 yards away, but I want to use a micro-controller!
I read the National Semiconductor voltage regulator handbook from 1980 which gives an automotive tolerant circuit using an LM2930, which is now obsolete as is a rarity. But looking at substitute LDO regulator IC's it seems to be far cheaper to use a $1 DC to DC EBay convertor that build the circuit from scratch.
So here's what I'm thinking. Keep the DC to DC convertor in a separate enclosure from the microcontroller, add extra caps before and after the convertor, with a 36 volt TVS as a precaution. Set it to output 8 volts and put a regular 7805, with the datasheet suggested caps, on the shielded microcontroller board.
Will this be enough to keep the microcontroller happy and not constantly resetting?