[sdiy] Minimoog clone

[ASSI]

On Sunday 11 July 2010, David Griffith wrote:
> A keyboard is called "matrixed" because it electrically appears to
> be a grid of switches.  You know when a particular key is pressed
> when a circuit is completed when a circuit goes from the column to
> row wire.

A key matrix proper has a switch and a diode at each crosspoint, fully 
decoupling each key from all others when using a one-hot scanning 
sequence.

Some information on how the newer Fatar keybeds are wired:
http://www.doepfer.de/DIY/MKE_keyboards.htm

If you get an older one, this page may be help:
http://johnp.net/projects/lmk3+/

The Mini has a two-bus keyboard that just sends out low-note-priority 
pitch CV and trigger (trigger has to come after pitch and is really a 
gate signal on the keyboard connector), so as Paul said, you need a 
keyboard scanner that checks for the lowest key pressed and convert 
the result to a CV (1V per octave) and gate (10V).


Achim.
-- 
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Wavetables for the Terratec KOMPLEXER:
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