Doepfer USB64 Universal Midi and USB Controller Electronics Kit - Manual (Page 9)

USB64 User's Guide V1.3 Page 9
The right part of the sketch shows the pin out of the pin headers. Normally 10 pin female
connectors with ribbon cables are plugged to the pin headers JP1 – JP8. Eight female
connectors with ribbon cables are included with the USB64. The controls (e.g. potentiometers
or switches) are soldered to the open ends of the ribbon cable. The left part of the sketch
shows the pinout of the 10 wires of the ribbon cables. We strictly recommend this type of wiring
but not to solder the wires directly to the pin headers JP1 – JP8. Usage of the ribbon cables
with female connectors allows to disconnect the controls from the electronics very easily.
Rotary or slider potentiometers are connected in this way:
•
lower resp. left end terminal to GND
•
wiper / middle terminal to one of the analog inputs 1 ... 64
•
upper resp. right end terminal to +5V
Potentiometers with resistance values in the range 4k7 ... 100k can be used. We recommend
10k (linear).
Momentary or toggle switches can be used in two different ways:
state of rest aktive state
Midi data voltage Midi data voltage
version 1 0 0V 127 +5V
version 2 127 +5V 0 0V
Simple momentary switches (one contact, open at rest) or simple toggle switches (one contact
on/off) are required. According to the desired behaviour (version 1 or 2 in the above table) the
switch has to be wired correspondingly:
Connection of a
rotary potentiometer
Connection of a
slider potentiometer