Erica Synths DIY MODULATOR Manual de usuario
GUIDE TO ASSEMBLY OF ERICA SYNTHS DIY MODULATOR
If you are reading this, most probably, you are about to build Erica
Synths DIY Modulator. This module is 35mm deep, skiff friendly,
has solid mechanical construction and doesn’t require wiring.
The Modulator essentially is LFO with simultaneous triangle and
square wave outputs, clockable S&H with external CV input and
noise source. A kit comes with two versions of noise generator –
simple, transistor-based and more complex Zener diode-based one.
Latest provides perfect, full spectrum white noise.
The DIY Envelope kit comes in three versions:
1) 3 PCBs + S&H chip + connectors,
2) 3 PCBs+ S&H chip + connectors + panel,
3) Full kit.
FEATURES:
LFO with triangle and pulse wave outputs
Choice of transistor-based or Zener diode-based noise generator
for massive, full spectrum white noise
S&H circuit based on rare, high quality S&H chip
S&H CV and clock inputs
SPECIFICATIONS:
•LFO output amplitude -5V…+5V
•LFO frequency range 0,1…20Hz (configurable)
•Noise output level 10Vptp
•S&H CV input level up to 20Vptp
•Panel width 8HP
•Module depth 35mm
•Power consumption 27mA@+12V, 22mA@-12V
1
34
2
5
1
2
3
4
5
Set desired LFO frequency! LED gives visual
feedback on LFO pulse wave output.
This is white noise output
This is S&H circuit input. Apply here and turn
them into stepped CVs on the S&H output. If
no external clock is applied, S&H frequency is
defined by FREQUENCY knob setting.
This is external S&H clock input. If nothing is
patched here, it’s normaled to the LFO.
These are LFO and S&H outputs.
Take precautions with regard to electrostatic discharge (ESD) safety. Handling components should be done in
electrostatically safe environment. Use personal and workplace grounding. Any discharge (even a minor one) from
body to a component may permanently damage it.
Our PCBs have silkscreened both component values and designators nevertheless we highly recommend you to print
out files with component placement before you start assembly of the module. And, please, at least take a look on this
manual!
Some components are marked as NU (not used) –leave those unpopulated! Some components are market as OPTION
(those are for optional modifications) –leave those unpopulated for now.
ASSEMBLY
1Solder horizontally placed resistors and diodes! Pay
attention on orientation of diodes! Also solder DIP14
socket! Few resistors are placed vertically; solder
those too!
2
GUIDE TO ASSEMBLY OF ERICA SYNTHS DIY MODULATOR
3Solder transistors, S&H chip in metallic can (align a key
with a silkscreen for correct orientation). Also solder
jacks and potentiometer –they are installed on
component side.
4Turn the PCB around and solder PSU connector,
resettable fuses (you may replace them with wire
jumpers on your own risk), noise source
connectors and electrolytic capacitors!
This is negative
lug of the
electrolytic
capacitor
Solder capacitors, ferrite beads and reverse PSU
protection diodes!
GUIDE TO ASSEMBLY OF ERICA SYNTHS DIY MODULATOR
5Insert the LED (mind the polarity and don’t solder it
yet)! Install the front panel, fix it with jack and
potentiometer nuts! Insert the LED in the relevant hole
and solder it.
6Install a potentiometer knob! Now it’s time
to assembly noise boards!
7
You have a choice to build transistor-based or zener
diode-based noise generator module. The last generates
better, full spectrum white noise, while transistor based
noise generator is simpler, but it may require noise
transistor selection. We’ll start with the transistor one.
Solder all resistors and DIP8 socket on it!
8Solder capacitors, electrolytic capacitors and a
trimpot! Also solder ferrite beads (you may replace
them with 10ohm resistors or wire jumpers). Solder
a transistor. You may need to hand select better
noise transistor later. Also solder 1x4 male
connectors on the opposite side of the PCB!
9For Zener diode-based noise module solder all diodes,
resistors (they are placed vertically; you may want to
replace them with 0805 smt resistors) and DIP socket!
10 Solder capacitors, electrolytic capacitors (there are
few non polarized – don’t mix them up with
polarized ones) and a trimpot! Also solder 1x4 male
connectors on the opposite side of the PCB!
GUIDE TO ASSEMBLY OF ERICA SYNTHS DIY MODULATOR
11 Install the noise generator board! We recommend to
use some drop of glue to fix the connectors together. 12
8
Congratulations! You have completed the
assembly of Erica Synths DIY Modulator. If
assembly is done correctly, the module
should work straight away.
Calibration is easy –use oscilloscope to
observe signal amplitude on the noise
output. Adjust the trimpot to get -+5V
amplitude! If you do not have access to the
oscilloscope, you can calibrate it on ear –just
get desired volume of noise.
ENJOY!
Otros manuales de Modulador de Erica Synths
