Re: counting encoder holes ?

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

on

> pin 8.
>

One trick is to look for a electrolitic cap on the board and look for
pwr and ground going to it.

Wally


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@y...> wrote:

>
> --- 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