Seb's Synth-DIY Pages

JoyKontrol - User manual


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Physical connections


Power connection

An external +/-12V power supply is required.  Although there is some power supply isolation and de-coupling, if the power rails (particularly the negative rail) are noisy there may be some coupling into the analog CV outputs.  The power is connected to J1 with pins as follows:

Pin 1 +12V (90mA)
Pin 2 Analog Ground
Pin 3 Digital Ground
Pin 4 -12V (10mA)

The 2 grounds should be taken back to the power supply ground with separate wires.



MIDI connections

MIDI In - This is used for learning MIDI messages and minimum/maximum values
MIDI Thru - This is an exact copy of what is received to the MIDI In
MIDI Out - MIDI messages resulting from controller movements are transmitted here.  There is always a pause of 1ms after each MIDI message, thus ensuring that the maximum data rate will never exceed 50% of the bandwidth of a single MIDI connection.



Analog CV outputs

There are 6 analog CV outputs: 1 for each axis of each joystick.  There is no analog output for the DATA knob.  The output voltage range is from approximately -5.23V to 5.23V.  The centre point of each joystick axis is adjusted to 0V with the following trimmers:

X1 - RV6
Y1 - RV4
Z1 - RV2
X2 - RV5
Y2 - RV3
Z2 - RV1




Configuration of the MIDI output


Calibrating the joystick centre points

Before the JoyKontrol is first used, and periodically if necessary, the centre points should be calibrated.  This is done simply by holding the EDIT button for 5 seconds while not in edit mode.  Do not touch the joysticks during this time.  The display will show 'CAL' when the procedure is complete.



Setting the MIDI output channel



Viewing/selecting/loading the settings memory location

The joystick centre points and MIDI channel are global settings.  All the rest of the settings are stored per memory location.  There are 5 memory locations.



Entering hardware test mode

To enter hardware test mode, press and hold the MEM button and turn the DATA knob beyond the memory location number 5 to display X1, Y1, Z1, X2, Y2, Z2 or DAT.  When the MEM button is released the raw values of the selected controller will be displayed.  To exit hardware test mode select and load a normal memory location from 1 to 5.



Assigning MIDI messages to each controller


Pressing the MEM button at any point during the edit procedure will cause the edit to be cancelled - all changes will be discarded and edit mode will be exited.





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