[chbot] Data filter

Marshland Engineering marshland at marshland.co.nz
Wed May 12 02:50:49 BST 2021

I forgot to mention that when I read the data with a signal from my signal
generator I get only a 2-3 count deviation at 60000 pluses so the ATMEGA reads
the correct stuff. 

It means that noise is from the drum speed variation.  The encoder is a
precision USA made instrument so that should be fine. 
Cheers Wallace.   

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