[phoenix-project] Capacitor Experiment And ADC S/H capacitor
- From: "Pramode C.E." <pramode_ce@xxxxxxxxxxx>
- To: phoenix-project@xxxxxxxxxxxxx
- Date: Sun, 28 Jan 2007 07:51:58 +0000 (GMT)
Hello,
I connected a 10M Ohm resistor between D3 and ADC
channel 0 and executed the capacitor charge/discharge
program. The result was the usual capacitor
charge/discharge curve
- the capacitance value computed was about 29pf. Is
this because of the S/H capacitor in the ADC input?
(the Atmega16 manual says its value is about 14pf).
Will this capacitance not create a problem when
measuring the capacitance of the `home-made' metal
foil capacitor?
Another question: is it possible to demonstrate
something like capacitive touch sensing?
Pramode
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