Re: Schematic for IIc mouse?

[Mark Frischknecht <appleiiguy@gmail.com>]

On 2009-04-05 09:45:28 -0700, Mark Frischknecht <appleiiguy@gmail.com> said:

> On 2009-04-05 08:57:08 -0700, Patrick Schaefer <pa.schaefer@web.de> said:
>
> > Michael Black schrieb:
> >
> > > YOu can't get much simpler than the original Macintosh mouse.  The
> > > mechanical wheels, the optocouplers, the 339 comparators to sharpen
> > > up the signals, and the pushbuttons.
> >
> > There was one design that is even simpler -- just the optocoupler and 
> > pullup resistor. I don't remember if they skipped the LM339 to save 
> > money, or if it has been added later to improve the slew rate of the 
> > output signals.
> >
> >
> > Patrick
>
> I have a laser 128ex mouse It says on its box that it is compatabl with 
> the //c and mac 128 Ill pull it out and take a look at it

I scanned the mouse pcb and put them here 
http://picasaweb.google.com/AppleIIguy/AppleIIScans#

--
Close this world. txen eht nepO
                                                                        |     
Mark Frischknecht