[sdiy] Polyphonic keyboard scanner

[Steve Carter]

David, try:  http://www.lazyblueoctopus.com/html/oberheim.html

Steve



On 2 Aug 2009, at 07:15, David G. Dixon wrote:

> Thanks to all for the replies.  I am very interested in looking at the
> Oberheim OB-Xa schematic.  Any hints where I might find it?
>
> Also, I bit the bullet and bought a book on microcontrollers today  
> (at the
> brilliant Powell's Technical Bookstore in downtown Portland, OR --  
> if you've
> never been, and you find yourself in the area, you really must check  
> it
> out!).  The book is "Programming and Customizing PICmicro  
> Microcontrollers"
> by Myke Predko.  It's nearly 1200 pages, and it came with a PCB in an
> envelope behind the front cover for building a PIC programmer (how  
> cool is
> that?!? -- I've never bought a book with a PCB in it before!).  Get  
> this: it
> was only $22!  And, the project on page 922 is a switch matrix key
> interface!