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  #1  
Old 05-18-2011, 10:43 AM
nealbeard nealbeard is offline
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Default Casio SA series

Hi I found this schematic for the casio SA7 posted by Jeff Stonestreet on casper electronics

http://casperelectronics.com/images/.../schematic.JPG

At a glance does anyone know if this means it is possible to use the umr to control it?

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  #2  
Old 05-18-2011, 02:40 PM
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John John is offline
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Yes, this should work well.

In the diagram, "scan" lines are the matrix select lines. "read" lines are the matrix data. The UMR would be used in a "scan high" configuration.

Let me know if you'd like to discuss further..
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Old 05-19-2011, 11:30 AM
nealbeard nealbeard is offline
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that's brilliant.

I'll put in an order soon - and hopefully it'll be straightforward to install!

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Old 06-29-2011, 02:18 PM
nealbeard nealbeard is offline
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Hi John (or anyone else!),

Got the kit and just going through my notes before I start.

One thing I'd like to confirm is which select in/data out numbers connect to which pins on the SA.

As I understand it from the diagram posted earlier in this thread I wire

SA PINS

30 >> SELECT IN 1
29 >> SELECT IN 2
28 >> SELECT IN 3
27 >> SELECT IN 4
26 >> SELECT IN 5
25 >> SELECT IN 6
24 >> SELECT IN 7

and SA PINS

18 >> DATA OUT 1
17 >> DATA OUT 2
16 >> DATA OUT 3
15 >> DATA OUT 4
14 >> DATA OUT 5
13 >> DATA OUT 6
12 >> DATA OUT 7
11 >> DATA OUT 8

Many thanks...

...and sorry to be a bit dense but I'm still getting my head around the matrix thing ;-)

Last edited by nealbeard; 06-29-2011 at 06:40 PM.
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Old 06-30-2011, 10:02 PM
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Looks good, except I think you have the ordering of the data lines reversed.

Lower notes go with lower data line #s. If I understand the diagram correctly, "11" is the data line for the lowest note in each select group, and "18" is the data line for the highest note in each select group.

No harm if you were to hook it up as you described, but the MIDI note response would be jumbled.

Hope this helps...let me know how things work out.
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Old 07-01-2011, 08:43 AM
nealbeard nealbeard is offline
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Heh heh i did wonder that...



Thanks
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