MagnusBomba
Nuclear
- May 16, 2009
- 8
I have a board that has a 5v rail for microcontroller (and other electronics). I also have an external sensor that I need to provide 5v to. I am concerned, that if I connect the 5v from main rails directly to the sensor, the entire board will go (in case of fault/short). Previously I have "solved" this by deriving another 5v supply and using only for the sensor (obviously this is crud, expensive and not needed). My question is, what type of circuit can I have, that will allow me to power the sensor from the same main 5v rails, but protect the main board if the sensor supply is shorted?