[Coco] MC-10 Composite board progress

[Zippster]

Well, I finally got around to working out the sound portion of the MC-10
Composite board.  A voltage divider/low-pass circuit seems to be giving good
results (you can make out the patch for the divider on the board).

I think these are probably ready for me to order some final-version PCBs.

<https://drive.google.com/open?id=0B1sgl615FlGnanZSaDlpVDRJZnM <https://drive.google.com/open?id=0B1sgl615FlGnanZSaDlpVDRJZnM>>

I’ll be sending one of these prototypes to Simon for him to use in his
MC-10 coding efforts.  :)

- Ed