Erica Synths WOGGLEBUG User manual

If you are reading this, most probably, you are about to build Erica Synths Wogglebug. A Wogglebug has nostalgic
value for us, because in the beginning of 2014 a Wogglebug panel with a bug design was the first Erica Synths
project we offered for DIY community and it actually started a company. On August 2015 Scott Deyo from
Brideschamber dropped us a mail asking, if we plan to make another run of Wogglebug panels, as we took it
serious.
The Wogglebug features 3 random audio outputs –Woggle tone, Tone, and Ring, a ringmodulated version of both
above , 3 random CV outputs with a wide range of randomness control, as well as Rate CV input, External Clock
input to sync a module to the external clock, and Clock Output to use a Wogglebug as a clock source.
We adapted Wogglebug for eurorack standard –recalculated component values to make it work properly from
12V PSU, added clock rate and stepped CV indicator LEDs, developed skiff friendly PCB and squeezed all parts on
a single PCB and made a new panel. The module doesn’t need wiring and calibration, and it’s comparably easy to
build –almost as easy as to draw an owl.
GUIDE TO ASSEMBLY OF ERICA SYNTHS WOGGLEBUG
Technical characteristics
Audio output amplitude…………………8V ptp
CV output amplitude…………………….15V ptp
Power consumption…………….30mA@+12V
……………..18mA@-12V
Module width…………………………………..14HP
Module depth…………………………………25mm

BOM
Links are from Farnell.lv, but you can use the part number for local Farnell
CAPACITORS
C2
-C14
100n
13
SMD 1206
C1
100n
1
Ceramic, 2,5mm spacing
C15
10n
1
Film, 5mm spacing
C18
1n
1
Ceramic, 5mm spacing
C23
- C25
47n
3
Film, 5mm spacing
C19, C20
1µ
2
Electrolytic >25V, 2,5mm spacing
C21
2.2µ
1
Electrolytic >25V, 2,5mm spacing
C22
3,3µ
1
Non polarized Electrolytic >25V, 2,5mm spacing
C16, C17
47µ
Electrolytic >25V, 2,5mm spacing
RESISTORS
R01, R05
3k3
2
5%
R1
820ohm
1
5%
R02
150k
1
5%
R2
2k2
1
5%
R3, R4, R5, R04, R41
68k
5
5%
R03, R6, R7, R9, R10
100k
5
5%
R8, R40
300k
2
5%
R11, R13
-R16,
10k
5
5%
R12
8k2
1
5%
R17
10M
1
5%
R18
120k
1
5%
R19
15k
1
5%
R21
-R27
1k
8
5%
R29
-R31
1M
3
5%
R31, R32
20k
2
5%
R33
220k
1
5%
R34
4k7
1
5%
R35
470ohm
1
5%
R36
49K99
1
1%
R37
-R39
33k
3
5%
SEMICONDUCTORS
T1
2N3906
1
T2
-T4
2N3904
3
U1, U2
CD4046
2
DIL case
U3
LF398
1
DIL case
U4
LM555N
1
DIL case
U5, U6
TL072
2
DIL case
U7
TL074
1
DIL case
D1
-D4
1N4148
4
D5, D6
1N4007
2
Vactrol
VTL5C3
1
Farnell VTL5C3
Vactrol
VTL5C3/2
1
Farnell VTL5C3/2
LED
3mm
2
Color of your choice
POTENTIOMETERS
V2
-V4
B1M
3
Thonk
V1, V5, V6
B100k
1
Thonk
OTHER
L5, L6
Ferrite bead
2
Can be replaced by 20ohm resistor
Power connector
2x5 pin
Jacks
9
Tnonkiconn
IC sockets
16 pin
2
IC sockets
14 pin
1
IC sockets
8 pin
4
GUIDE TO ASSEMBLY OF ERICA SYNTHS WOGGLEBUG

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. Then follow the instructions below!
ASSEMBLY
1Let’s start with drawing an owl!
2First solder SMD decoupling capacitors!
3Erica Synths Wogglebug PCB V2 has some errors on silkscreen –resistor values have to be changed according
to the BOM! Start populating the PCB with these resistors!
4
GUIDE TO ASSEMBLY OF ERICA SYNTHS WOGGLEBUG
Use 150k
resistor here!
R38-R39
should be 33k
Swap these!
R03=68k, R04=100k

4Step by step solder all passive components!
5Solder IC sockets and active components!
GUIDE TO ASSEMBLY OF ERICA SYNTHS WOGGLEBUG
6Take tongs and cut off positioning lugs of the
potentiometers!

7Turn the PCB around and solder potentiometers!
9Put the front panel on, and position jacks in
relevant places! Now you can solder them.
GUIDE TO ASSEMBLY OF ERICA SYNTHS WOGGLEBUG
10
Same goes with LEDs –insert them in relevant
holes (mind the polarity), position them in holes
on the front panel and then solder them on PCB!
8Insert Jacks, but do not solder then yet!

11 And now it’s time to put the front panel on and fix it
with nuts of jacks and potentiometers! Use pot
knobs of your choice!
GUIDE TO ASSEMBLY OF ERICA SYNTHS WOGGLEBUG
12 Check, if you get fluctuating frequency audio on
bottom row jacks and CV and Clock signals on
relevant outputs!
The Wogglebug should work straight away. Use the module for unpredictable, random patches, sonic
experiments, as a clock source and as a great decoration in your modular setup!
Erica Synths Wogglebug demo on Youtube.