Capacitive touch using only ADC pic12f752
I developed an application for capacitive touch using CVD method so it works fine.
Now i have to measure SNR (signal to noise ration) based on AN1334. but i do not have any communication way on this microcontroller.
I tried using oscilloscope to view analog signal on sensor pin, but it is impossible to identify the noise.
the best method is to compare average value in two states: pressed and unpressed state of the sensor. but how?
Have you any idea please?