Is there a quick and easy way to get 4v out using a
5v regulator l7805cv
I keep getting 5.04v tried adding a v resistor to the gnd
Marc :-P
do you mean you put a resistor in series with the gnd pin? That would
only let you go up from 5V, not down to 4.
You should get the right regulator.
If you're really stuck, have to use that regulator, and have a negative
supply available, you could always run the gnd pin at -1V.... Thats
pretty ugly though.