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View Full Version : FRC analog input RC filter values


Gdeaver
01-01-2006, 21:13
I Know this has been mentioned on the forum before but, I can't find it. What are the resistor and capacitor values that are used for the analog input low pass filter? Isn't it set for 400Hz ? Can any one help or point me to a source?
Thanks

sciguy125
01-01-2006, 21:44
I found a schematic (http://www.ifirobotics.com/docs/analog-digital--i-o-rc.pdf) on IFI's website. The resistor and cap are 1K and 0.047uF, respectively.

If I recall, the cutoff frequency is 1/(2*pi*R*C). That puts it at 3.4kHz.

Rickertsen2
01-01-2006, 22:03
out of curiosity, what are you hooking up that you are concerned about bandwidth?