BLACK NOISE EG-LFO II User manual

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Thank you for purchasing EG LFO II module.
As its name implie, EG LFO is composed of an Envelope Generator and an LFO.
The envelope generator offer control over Rise time, the Hold and the Fall time. Two range of envelope are
available, slow and fast. You can also modify the speed off the fast mode using the speed expander on the back
of the module.
On outputs you will find the envelope output and a inverted copy of the envelope.
EG LFO II also feature a LFO mode, speed can be control using rise and fall control. Two speed mode are
available, LFO range in slow mode and audio range in fast mode. You can modify the speed off the fast mode
using the speed expander on the back of the module.
On output you will find the LFO output and a inverted copy of the LFO.
Thank you
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EG-LFO II
Introduction 01
Summary
Introduction
01
Installation & power safety
02
Overview - Envelope Mode
03
Overview - LFO Mode
04
Overview - Backplate
05

General Specifications
Power Consumption
+12V : 22mA
-12V : 17mA
+5V : 0mA
Panel Width
4HP
Module Depth
20mm - skiff friendly
BLACK NOISE warrants is products to be free of
defects in materials or workmanship and to be
conform with the specifications at the time of
shipment for a period of two years from the date
of purchase.
During that period any malfunctionning or
damaged units will be repaired, service and
calibrated into your workshop. This warranty does
not cover any problems resulting from damages
during shipping, incorrect installation or power
supply, abusive treatement, or any other obvious
user-inflicted fault.
If your product warranty is passed, it still can be
serviced as long as parts are available in our
workshop. We reserve the right to charge for labor,
parts and transit expenses where applicable.
Before sending your product to our workshop
please contact us for RMA and details. Any
unsolicited parcel will be rejected and or returned.
The postage to our workshop is on the customer.
The return of your module is on us. BLACK NOISE
can not take any responsability for damages
caused during transport.
Warranty
1
NO
YES
Unplug you rack power from the main.
1
As shown on the sketch on the right, align the red
line from the power ribbon cable with the line draw
next to the power connector.
2
Check twice the alignment of the ribbon cable.
3
Set to LFO mode
Set the speed to HIGH
Set Rise knob to 0
Set Fall knob to 0
4
Plug you rack power to the main and power you
rack.
5
If the LEDs above the outputs light up you module
is ready, if not please contact us at :
[e-mail]
6
EG-LFO II
Installation & power safety 02

RISE
HOLD
FALL
Speed selector
Rise controls the time it takes for the envelope to reach its
maximum level.
Rise
1
1
2
4
7
Output of the envelope.
Envelope Output
7
Inverted copy of the envelope output.
Inverted envelope Output
8
Mode selector
4
The Speed selector allows you to set the speed of the
envelope. For a very fast envelope select "High speed" for
longer envelopes select the "Low speed" mode.
The duration of "High speed" mode can be modified
using the connector on the back of the module for more
information see section Overview - Backplate
5
Gate input controls the triggering of the envelope. A
trigger will trigger the Rise phase then the Fall phase. To
activate Hold mode use a gate. The envelope will
remain in Hold mode as long as the gate is high.
Gate Input
6
3
6
5
8
Low High
Envelope Mode
LFO Mode
when the module receives a gate, the envelope remains in
the hold position for the duration of the gate. Hold allows
you to adjust the level of the envelope during the hold
phase.
Hold
2
Rise Fall
Hold
Gate
Rise Fall
Hold
Gate
Rise Fall
Hold
Gate
Fall controls the time it takes for the envelope to return to
its initial level (0v) after the end of the trigger or the gate.
The Mode selector allows you to switch between Envelope
and LFO mode. When a mode is selected the mode icon is
illuminated.
Fall
3
Envelope Mode
To activate envelope mode, see step 4.
Rise Fall
Hold
Gate
EG-LFO II
Overview - Envelope Mode 03

3
FallRise FallRise
Rise
1Hold 2
RISE
HOLD
FALL
Rise controls the time it takes for the LFO to reach its
maximum level.
FallRise FallRise
In LFO mode the Hold phase will not be triggered, so it has
no effect on the LFO.
FallRise FallRise
Fall controls the time it takes for the LFO to return to its
initial level after the end of the Rise phase.
1
2
4
7
Output of the LFO.
LFO Output
7
Inverted copy of the LFO output.
Inverted LFO Output
8
If a trig is sent during the LFO Fall phase, the LFO will
retrigger and a Rise phase will be triggered from the
current LFO state.
Gate Input
6
3
6
5
8
Fall
LFO Mode
To activate LFO mode, see step 4.
Speed selector
Mode selector
4
The Speed selector allows you to set the speed of the
LFO. For a audio rate LFO select "High speed" for slower
LFO select the "Low speed" mode.
The duration of "High speed" mode can be modified
using the connector on the back of the module for more
information see section Overview - Backplate
5
Low High
Envelope Mode
LFO Mode
The Mode selector allows you to switch between Envelope
and LFO mode. When a mode is selected the mode icon is
illuminated.
Trig Trig Trig
EG-LFO II
Overview - LFO Mode 04

Speed Expander
1
As shown in step 5 "Speed Selector" of the
Overview-Envelope & Overview-LFO sections, the
speed of the "High Speed" setting can be modified.
The range of the "High Speed" mode and "Low
Speed" mode are regulated by capacitors.
By modifying the capacity of these capacitors it’s
possible to speed up or slow down the LFO or the
envelope.
The connectors shown in the illustration allow you
to add one of multiples capacitors to the module to
slow down the LFO and/or the envelope.
To select the type of capacitor and its value, please
follow the following instructions.
Capacitor Type
2
There are several types of capacitors (Film, ceramic,
electrolytic etc.) but they can be divided into two
categories, polarized capacitors and non-polarized
capacitors.
The speed expander requires non-polarized
capacitors. As explained earlier to slow down your
LFO or Envelope you will need large capacitors.
The easiest large capacitors to find are electrolytic
capacitors, unfortunately they are polarized
capacitors. However there is a workaround for using
EG-LFO II with polarized capacitors.
Depending on your capacitors, consult the dedicated
section.
Un-Polarised Capacitors
3
As stated before un-polarized capacitors can be connected in either
direction. Simply connect one of the capacitor tabs to one of the
Speed Expander pins and the other tab to the other pin.
Regarding the type of capacitors we recommend ceramic capacitors
because they are easy to find and cheap. However, the tolerance on
their capacitance can be high. If you want an accurate capacitance
value we recommend using film capacitors.
To increase the capacitance without changing the value of your
components you can connect several capacitors in series, the total
capacitance will then be equivalent to the addition of the capacitors
(Ctotal = Ca + Cb +...)
Do not use capacitors lower than 16V. For total capacitance we
recommend between 10n and 10µ for best results.
Speed Expander
1
Un-Polarised Capacitors
Polarised Capacitors
4
On electrolytic capacitors the cathode (or negative side, the "-" side)
is indicated by a white band on the component. The "-" sign can also
be printed on this white band.
As shown in the diagram it is possible to use two polarized
capacitors with EG LFO II. Simply connect the anode of each
capacitor to one of the Speed Expander pins (there is no particular
orientation) and connect the cathodes of the two capacitors
together.
As the capacitors are connected in series the total capacitance
applied to the Speed expanders will be equal to the addition of the
value of the two capacitors (Ctotal = Ca + Cb).
Do not use capacitors lower than 16V. For total capacitance we
recommend between 1µ and 10µ for best results.
Electrolytic Capacitor
symbol
Wiring
Capacitance Value = CA+ CB
1µf + =1µf 2µf
Capacitor A Capacitor B
Pin A Pin B
Speed Expander Pins
1µf 1µf
Film Capacitor Ceramic Capacitor
Wiring
Capacitor A
Pin A Pin B
Speed Expander Pins
470nf
EG-LFO II
Overview - Backplate 05