Voltage
across a capacitor discharging through a resistor as a function of
time is shown in the figure below. The experimental points are
obtained by digitizing the voltage at regular intervals. To do the
experiment connect one end of the capacitor to ground and the other end
to one of the ADC inputs. Connect one of the digital output lines to
the same point through a resistance R. To get the discharge curve take
the digital output HIGH for a second and then take it LOW. Start
digitizing the output to get the discharge curve. The is the program to do it.
