hello
I'm going to "read" an analog signal with arduino, an ntc temperature sensor.
The analog input pin has a very high impedance.
If I connect the ntc directly to the pin everything works fine.
Can I have any benefit if I interpose a voltage follower between the sensor and the arduino pin?
I'm a novice so I don't know if this reasoning is right:
If the sensor cable is short and the environment is quiet I don't need a buffer (voltage follower)
If the sensor cable is long and / or the environment is noisy I should put the buffer very close to the sensor, and send the op amp output to the analog pin.
Are these statements right?
I'm going to "read" an analog signal with arduino, an ntc temperature sensor.
The analog input pin has a very high impedance.
If I connect the ntc directly to the pin everything works fine.
Can I have any benefit if I interpose a voltage follower between the sensor and the arduino pin?
I'm a novice so I don't know if this reasoning is right:
If the sensor cable is short and the environment is quiet I don't need a buffer (voltage follower)
If the sensor cable is long and / or the environment is noisy I should put the buffer very close to the sensor, and send the op amp output to the analog pin.
Are these statements right?