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Topic: How to increase resolution of analog input (Problem Solved - Thanks) (Read 2 times) previous topic - next topic

fkeel

got it. makes sense.

if I want to use a 0.1mf and 1mf capacitor to reduce noise, where would I put them, assuming I am using the set up you suggested?
( http://arduino.cc/forum/index.php?action=dlattach;topic=53242.0;attach=883;image )

To my best understanding, I connect them between +5v and ground and I connect them in parallel - so even before R3. However intuitivly I would connect them after R2.

Could you give me a pointer as to where to add them to your schematic?

Thanks

p.

CrossRoads

Put them across the noise source going into the op amp, so across the +in or the -in terminal to ground, whichever side your sensor goes in.
Stop the noise before it gets amplified.
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