Re: counting encoder holes ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@n...>
wrote:

>
> That's right, you have two edges on each pulse and two sets of

pulse

> trains. So the number of pulses per inch or revolution is 4 times
> the number of lines per inch/revolution.
>
> Graham

Great, at least it is something I can use.

Any ideas on how to figure the voltage, or should I assume it is 5
volts?


The main IC is one I cnnot identify. it is a National Semi, 8 pin
DIP with M8528. I can't seem to cross reference that number.

My main interest, of course, is to connect 5v and ground properly.

Gnd is (I assume on the ground plane) on pin 4 so I assume pwr is on
pin 8.

Anyone have a book that would cross reference this chip ?

Dave