Sensing analog signals. Filters - Raspberry Pi Forums
hello all,
garden watering system working, can focus on "details"
, "the right way" of doing i'm doing in "the easiest" way
check soil moisture level, i'm reading values pcf8591 adc connected 4 yl38-yl69 sensors (cheap chinese sensors..)
precise, i'm doing arithmetic mean of 10 readings of every channel, trashing max , min value of each sensor.
problem sensors quite far adc (let's 10 meters) , seems me readings sensor not stable.
2 questions:
- phisically, there easy can shield analog signal? (sensors connected simple cat5 ethernet cable)
- programmatically, there "better" mean use filter strange values?
garden watering system working, can focus on "details"
, "the right way" of doing i'm doing in "the easiest" way
check soil moisture level, i'm reading values pcf8591 adc connected 4 yl38-yl69 sensors (cheap chinese sensors..)
precise, i'm doing arithmetic mean of 10 readings of every channel, trashing max , min value of each sensor.
problem sensors quite far adc (let's 10 meters) , seems me readings sensor not stable.
2 questions:
- phisically, there easy can shield analog signal? (sensors connected simple cat5 ethernet cable)
- programmatically, there "better" mean use filter strange values?
did have kind of resistor capacitor filter?
maximum sampling rate?
have small schematic of design?
maximum sampling rate?
have small schematic of design?
raspberrypi
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