Doepfer Pocket Electronic - Manual (Page 9)

User's Guide Pocket Electronic Page 9
Linear potentiometers with resistance values 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 (1 contact, open at rest) or simple toggle switches (1 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:
In both cases an additional 10k resistor is required (possible range 4k7 to 100k) to pull the
analog input to a defined state during the switch is open.
• Version 1: The resistor is soldered between GND and the control voltage input 1...16. This
way the input is pulled to GND ( =0V corresponding to Midi data 0) as long as the switch is
left open. When the switch is closed the voltage jumps to +5V corresponding to Midi data
127.
• Version 2: The resistor is soldered between +5V and the control voltage input 1...16. This
way the input is pulled to +5V (corresponding to Midi data 127) as long as the switch is left
open. When the switch is closed the voltage jumps to 0V corresponding to Midi data 0.
Sixteen 10k-resistors (range 4k7 ... 100k) are enclosed witch each PE delivery. Suitable
resistors are available in each electronic shop too (value: 10k, power: ¼ W, tolerance: 5%,
material: carbon).
Unused inputs have to be connected to GND. Avoid open inputs ! An open input will cause the
transmission of random Midi data causing undesirable side effects at the Midi receiver (e.g. Midi
overflow or random parameter fluctuations).
Connection of a momentary or
toggle switch (version 1)
Connection of a momentary or
toggle switch (version 2)