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KBD 2e - Keyboard Converter
Like most EFM modules the KBD2e is multi functional. It's primary function is to
convert a cheap plastic keyboard into a synthesizer controller. It can be built on a panel
and bolted in the rack or installed in the keyboard case.
Getting the keyboard can be a problem. The easiest to convert I have found so far are the
four octave Casio's. Once you have one you can ether build it in the case it came in or
remove the keyboard and build it a more useable new case.
Keyboard converter / interface.
Features...
1 volt per octave control
voltage
Key gate
Modulation LFO
Modulation VCA
Scaleable over 8 octaves.
+/-12 or +/- 15V
Requires one or two switch per
key keyboard with a voltage
divider of 1 resistor per key
100ohm 1%.
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Table of Contents
Related Manuals for EFM KBD 2e
Summary of Contents for EFM KBD 2e
- Page 1 1 resistor per key 100ohm 1%. Like most EFM modules the KBD2e is multi functional. It's primary function is to convert a cheap plastic keyboard into a synthesizer controller. It can be built on a panel and bolted in the rack or installed in the keyboard case.
- Page 2 The hard part is converting the keyboard..We want to turn something like this... Into something like this... Remove the screws from the case and then cut, carve, pry, unscrew, and pull the existing electronics from the case. Be careful not to break or damage the PC-boards on the keyboard itself.
- Page 3 keyboard circuit can be scaled. Remove the diode matrix form a switch buss using the switches and built a 47 resistor chain of 100 ohm 1% resistors. After all of the resistors are in place bridge the solder pads on the edge of the board to make a common point for all the switch pads to connect. Solder the connection wires to the ends of the chain and the common point before you screw it back to the keyboard.
- Page 4 PARTS LIST Small Kit C1,C2,C9 .001 C4-6...
- Page 5 R1,R2,R4,R6,R8,R9,R16,R21,R22,R24,R28 100K R3,R5,R12,R13,R14 R15,R17 390K R18,R27 2.2K R20,R23 D1-D3 1N914 2N3819 2N3904 2N3906 U1,U2,U4 TLO72 LM13600 Full Kit 100K...
- Page 6 Connections for +12V 3819 J112 keyboard wiring harness 0.1uF Keyboard Joystick TLO72 E B C S G D Q1 - 2N3918 2N3904 LM13600 Mod P.Bend or J112 2N3906 0.1uF KBD2E Keyboard -12V Interface/Converter 11/15/99 - 1/5/2001 -12V +12V Copyright 1999-2001 EFM...
- Page 7 2N3906 P1 1M Glide Mod Init 2N3819 1.0uF 2N3906 Glide Gate VCA Init +12V 3819 KBD2E to RXCV 0.1uF Expander Modifications E B C S G D TLO72 11/15/99 - 1/5/2001 2N3918 2N3904 0.1uF LM13600 Copyright 1999-2001 EFM 2N3906 -12V...
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