[sdiy] Keyboard Control

[Ray Wilson]

Here are some ideas and info about the side to put the current source to. I
agree with Harry and the design I show has the current source feeding the
top of the keyboard.

http://atlas.csd.net/~rjwsoft/keybrdcontroller.html

Ray
  -----Original Message-----
  From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Thomas Holley
  Sent: Saturday, October 18, 2003 11:23 AM
  To: synth-diy at dropmix.xs4all.nl
  Subject: [sdiy] Keyboard Control


      I have a rather fundamental question. In a keyboard controller
resistor ladder, does the high voltage side go to high pitch key or the low
pitch key. I have been tinkering with an old keyboard and soldered up a 100
ohm resistor between each key for a nice ladder when it finally dawned on me
that I had not a clue which side to put the current source on and which one
to ground. Thanks for your help

  Thomas
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