GUIDE TO ASSEMBLY OF ERICA SYNTHS DIY MODULATOR
5
Insert 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.
6
Install 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!
8
Solder 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!
9
For 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!
