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Capacitive touch_CVD method_response time measurment_PIC12F

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PIC_fann
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2019/05/20 02:39:41 (permalink)
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Capacitive touch_CVD method_response time measurment_PIC12F

Hi,
 
I developped a capacitice touch application using CVD methode with juste an ADC, it works fine.
My question is i want to measure the response time between an initial touch and LED response, for that i used the osciloscope on both pins to show the difference time, but it is not clear: the LED pin state changes from 0 to 5V -->ok, while, the sensor pin it represents juste a noise when it changes state.
 
There are an other way to calculate the real response time? how to improve it?
Thank you in advance for your help
 
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