Doepfer Pocket Electronic Bedienungsanleitung PDF herunterladen (Seite 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)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 31 32

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Doepfer Pocket Electronic Bedienungsanleitung Seite 9