Doepfer MKE Universal Midi Keyboard Electronics Kit - Manual (Page 9)

User's guide V2 page 9 MKE
(4) Keyboard connectors
These two female connectors (AMP Micromatch, 16 resp. 20 pin) are used to
connect the keyboard. They are compatible to the connectors used by the keyboard
manufacturer Fatar/Italy in their 2, 3, 4 and 5 octave keyboards. To connect MKE and
the keyboard ribbon cables with 16 or 20 pins and a suitable male connector on each
end are used. The male connectors are equipped with code pins that have to fit into
the corresponding holes in the pc boards of MKE and the keyboards. If the
connectors are put on in the wrong way the MKE/keyboard combination will not work
but it is not possible to damage the electronics or the keyboard.
For the different types of keyboards these connectors are used:
keyboard type connectors used Offset
2 octaves (25 keys) ST1B (one 20 pin connector) 12
3 octaves (37 keys) ST1B (one 20 pin connector) 0
4 octaves (49 keys) ST1A und ST2 (two 16 pin connectors) 12
5 octaves (61 keys) ST1A und ST2 (two 16 pin connectors) 0
The offset value indicates if the contact matrix of the manufacturer (Fatar) starts with
contact number zero or if the first 12 contactes (i.e. the lowest octave) are skipped in
the contact matrix. The table shows that for the 2 and 4 octave keyboards the lowest
octave of the contact matrix is not used. This has effect only on the transposition of
the keyboard in question and causes no problems as any desired transposition can
be chosen (0, 12, 24, 36, 48 ..., see below) for the MKE. One simply selects the
desired transposition to have the keyboard in the desired Midi note range.
If a keyboard with 2 or 3 octaves is used ST2 remains unconnected. If a keyboard
with 4 or 5 octaves is used ST1A leads to the lower and ST2 to the upper half of the
keyboard.
If you have ordered the MKE without keyboard and need some information about the
type of contacts and diode matrix please look at our web site. The schematics for
keyboards with 2, 3, 4 and 5 octaves are available as pictures from the MKE
information page:
www.doepfer.com → → → → PRODUCTS → → → → MKE → → → → connecting keyboards (link).
(5, 6, 7, 8) Connectors for pitch bend, modulation, volumen and sustain / after
touch
These connections are available as pin headers with three or four terminals. Version
1 of MKE is equipped with three pin headers with three pins (ST3, ST4, ST5) and
one pin header with four pins (ST6). Version 2 of MKE is equipped with four pin
headers with three pins (ST3, ST4, ST5, ST6).
The three-pin connectors (ST3, ST4, ST5, and ST6 for version 2) have these pins
available:
• left (pin# 1) GND (= potentiometer ccw terminal)
• middle (pin# 2) measured voltage (= potentiometer wiper terminal)
• right (pin# 3) +5V (= potentiometer cw terminal)
Standard three-pin female connectors with crimped wires can be used to establish a
detachable connection (available even as spare parts from Doepfer). As the