ronrayzap
Newbie level 2
i just wana ask if there are any limitations in electric current being inputted in the adc module of the pic16f877?
i am presently working on a project using the adc module and i have configured it as a 4 7-segment digit voltmeter in the mean time to test it. when i input 5v from the pic supply itself using a potentiometer to vary the analog input, the adc reacts well. the problem is when i input voltage from a dc voltage supply through a voltage divider, my circuit doesnt read the input and just displays the digit "8" in the least significant spot.
im just wondering why this happens and if the current in the voltage source has an effect because the current of the dc supply is significantly higher.
has anyone else experienced this? thanx for all the help in advance.
i am presently working on a project using the adc module and i have configured it as a 4 7-segment digit voltmeter in the mean time to test it. when i input 5v from the pic supply itself using a potentiometer to vary the analog input, the adc reacts well. the problem is when i input voltage from a dc voltage supply through a voltage divider, my circuit doesnt read the input and just displays the digit "8" in the least significant spot.
im just wondering why this happens and if the current in the voltage source has an effect because the current of the dc supply is significantly higher.
has anyone else experienced this? thanx for all the help in advance.