[sdiy] Walsh update

[Magnus Danielson]

From: Tim Ressel <madhun2001 at yahoo.com>
Subject: [sdiy] Walsh update
Date: Sat, 23 Mar 2002 15:44:01 -0800 (PST)

> To all,
> 
> AS you might have noticed, I kinda got distracted by
> this little midi project. No, I haven't forgotten
> about the Walsh thing. The board layout is done except
> for checking. I am planning on sending the board out
> for fab real soon now. The CPLD design has been done
> for a while, its time for me to do the next part.
> 
> <------------------------------------------------>
> In the spirit of the list, does anyone want to
> volunteer to check the layout? I can mail a package
> with all the docs. Don't have my PDF writer yet, so it
> has to be snail-mail.
> <------------------------------------------------>
> 
> This board will just be a breakout board for the Walsh
> CPLD. I have provided for both molex-style connectors
> (0.1") and dual-row header for ribbon cable. You can
> also populate the connector pins with machine SIP
> sockets to accept 24 ga solid wire.
> 
> This little kit will consist of board, CPLD, and
> socket. Price will be in the $20-$25 range depending
> on how much the boards cost me. I'm not trying to get
> rich here, just trying to cover my costs.
> 
> I will let you know when the stuff is available.

Question:

Why do you need a CPLD?
You can create any size of Walsh generator with a frequency divider
and a handfull of XNOR gates. For a organ setup, all you need is the
TOG part and 12 Walsh generators.

Maybe I should do a simulation and hand it out.

Cheers,
Magnus