Hall sensor time out calculation

[electronicsLearner77]

I want to measure the speed using the hall sensor, one part of it is to detect hall sensor time out. I want to set around 150ms as hall timeout, that is there is no hall transition for 150ms. So, i wanted to confirm 150ms corresponds to 1000/150Hz = 6.6 Hz? Am i correct or any other factor to be considered? Please advise.

 

[Harald Kapp]

hall sensor time out.

What do you mean by "hall sensor timeout"?
If you want to detect when there has been no transistion from the hall sensor's output within a timespan of 150 ms, a suitably set monoflop (monostable multivibrator) can be used. Here's an example.
No need to convert to frequency.

i wanted to confirm 150ms corresponds to 1000/150Hz = 6.6 Hz?

If a signal repeats at 150 ms intervals, that's equivalent to 6.66666 Hz (6.7 Hz after rounding). If the sensor's output changes more often, the frequency is higher.

 

[bidrohini]

What do you mean by "hall sensor timeout"?

I think he/she is referring to the time interval during which the system waits for a valid signal from the hall sensor.

 

[electronicsLearner77]

Hall time out is no hall signal from Hall sensor connected to the motor. So, I want to consider if there is no signal (low or high) for 150ms then hall is disconnected.

 

[bertus]

Hello,

Do you have a document to share where this signal is given?

Bertus

 

[electronicsLearner77]

It is connected to the micro input pin. I configured it as input capture in software.

 

[Harald Kapp]

I want to consider if there is no signal (low or high) for 150ms

Then follow the link in my post #2