i want to create filter circuit but i dont know how to do this..
now i have 1 project SIGNAL CONDITIONING SOIL MOISTURE USING CAPACITANCE SENSOR.
what should i do is,must create amplifier>buffer>filter>buffer>linearization>display LCD.
for amplifier,i used non inverting circuit(1k ohm to get unity gain because i want to maintain the input.input at range 1-5 v.)
my problem is,how should i do to built filtering circuit?...how the calculation must have to show to get the value of resistance & capacitance into the circuit? plez help me....
now i have 1 project SIGNAL CONDITIONING SOIL MOISTURE USING CAPACITANCE SENSOR.
what should i do is,must create amplifier>buffer>filter>buffer>linearization>display LCD.
for amplifier,i used non inverting circuit(1k ohm to get unity gain because i want to maintain the input.input at range 1-5 v.)
my problem is,how should i do to built filtering circuit?...how the calculation must have to show to get the value of resistance & capacitance into the circuit? plez help me....