zeroskj1988
Member level 2
hello sir, i want to make a circuit that measure negative voltage of battery.i am using pic adc to measure this voltage, but does not read negative voltage. so i have convert this negative to positive voltage.
problems
1. i don't have negative voltage on the system,to convert this negative volt to positive
if i am opting for differential amplifier with single supply then
2. negative of my positive and positive of negative supply both grounded to earth, so actually i need a negative voltage to measure this voltage
so i am thinking of a circuit which derive a -5v from the battery which is to be measured. i am uploading a image of proposed circuit.
can any body suggest any idea or feasibility of my circuit. i am thanking u i n advance
problems
1. i don't have negative voltage on the system,to convert this negative volt to positive
if i am opting for differential amplifier with single supply then
2. negative of my positive and positive of negative supply both grounded to earth, so actually i need a negative voltage to measure this voltage
so i am thinking of a circuit which derive a -5v from the battery which is to be measured. i am uploading a image of proposed circuit.
can any body suggest any idea or feasibility of my circuit. i am thanking u i n advance