The cut off frequency of this encoder's output?

[shaneelal]

low pass filter

I'm working on a project to determine the speed of a moving wire.I'm using an optical encoder to sense speed.The output of the encoder has some circuitry.What will be the cut off frequency? 1Hz? Which equation should I use to calculate R1 and C1. What value can I use for R2 and which comparator should I use?
Thank you.

 

[IanP]

Re: low pass filter

Pls post your attachments ...

 

[carrier]

low pass filter

if you use RC the wave is smooths.
you can use schmit trigger to waveshaping.