> Use Multiple Crosspoint Switches In A Matrix?

[zippy]

How can I do this?
do I only need 4 2*2 crosspoints switches or 8?

 

[marcbarker]

32 unique contact closures within an x-y matrix, requires 5 x 4 x-y lines.

I only see 4 x 4 here.

 

[zippy]

32 unique contact closures within an x-y matrix, requires 5 x 4 x-y lines.

I only see 4 x 4 here.

so I would need a chip with 1 more closure in the x-line?

edit: Does this work?
**broken link removed**