So you do understand the nature of the intended hall sensor application and why it should use a low pass filter?Can't visualize the ESD configuration, nor the signal conditioning circuit.
So you do understand the nature of the intended hall sensor application and why it should use a low pass filter?
I am trying to find the criteria for the Low pass filter selection for Hall effect sensor.
Because the output of the hall effect sensor is square wave and you don't want to pass the square wave to the input of ADC of the microprocessor. This is because ADC won't be able to read it and it will be able to read the sine wave coming from the Low Pass Filter or Signal Conditioning Circuit.
F=1/2*Pi*R*C
Of course you didn't as there are none.I must have missed any previous threads where the OP discussed his application.
Why do you think the output will be a square wave?Because the output of the hall effect sensor is square wave...
Why don't you want to pass a square wave to the ADC?...and you don't want to pass the square wave to the input of ADC of the microprocessor.
Why not? An ADC can read any waveform. It won't work if the frequency of the input signal is more than half the sampling frequency, but in that case a low pass filter won't help anyway.This is because ADC won't be able to read it...
there isn't more validation for the low pass point in the original post than for the ESD one. The only difference it that you can imagine possible motivations for a low pass in some hall sensor applications. It may serve a reasonable purpose.
The poster is asking how to select the low pass filter. How can you really help without understanding the actual function of the low pass for the application under discussion? Without any substantial information, I prefer to doubt if the low pass has a purpose it all.
...and then he said he wants a clean square wave (post 9).Since he mentioned that he wants a sine wave (post 4)...
If it becomes difficult to visualize let me know I will paste the Circuit, but I am trying to avoid that because of the Project.
In fact, we don't know much about the input signal. It's said to be a square wave, but which frequency, fixed or a larger range? Venkatgandham told in post #4 that he wants to get a sine after the filter, in post #9 it's a clean square wave. Looks like a helpless case.If you want square waves, then that suggests you want to detect the pulse frequency, or time between events, etc.
If you want sine waves, then that suggests you want to detect intensity, or presence of more than one signal, etc.
IMHO, that's unlikely unless someone's invented a way to make magnetic fields with square edges.In fact, we don't know much about the input signal. It's said to be a square wave...
IMHO, that's unlikely unless someone's invented a way to make magnetic fields with square edges.
It's possible the sensor has built-in circuitry that gives a binary on/off output, but then the signal shouldn't need conditioning.
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