Erica Synths WOGGLEBUG Manuel utilisateur

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

-C14

100n

SMD 1206

100n

Ceramic, 2,5mm spacing

C15

10n

Film, 5mm spacing

C18

Ceramic, 5mm spacing

C23

- C25

47n

Film, 5mm spacing

C19, C20

1µ

Electrolytic >25V, 2,5mm spacing

C21

2.2µ

Electrolytic >25V, 2,5mm spacing

C22

3,3µ

Non polarized Electrolytic >25V, 2,5mm spacing

C16, C17

47µ

Electrolytic >25V, 2,5mm spacing

RESISTORS

R01, R05

3k3

820ohm

R02

150k

2k2

R3, R4, R5, R04, R41

68k

R03, R6, R7, R9, R10

100k

R8, R40

300k

R11, R13

-R16,

10k

R12

8k2

R17

10M

R18

120k

R19

15k

R21

-R27

R29

-R31

R31, R32

20k

R33

220k

R34

4k7

R35

470ohm

R36

49K99

R37

-R39

33k

SEMICONDUCTORS

2N3906

-T4

2N3904

U1, U2

CD4046

DIL case

LF398

DIL case

LM555N

DIL case

U5, U6

TL072

DIL case

TL074

DIL case

-D4

1N4148

D5, D6

1N4007

Vactrol

VTL5C3

Farnell VTL5C3

Vactrol

VTL5C3/2

Farnell VTL5C3/2

LED

3mm

Color of your choice

POTENTIOMETERS

-V4

B1M

Thonk

V1, V5, V6

B100k

Thonk

OTHER

L5, L6

Ferrite bead

Can be replaced by 20ohm resistor

Power connector

2x5 pin

Jacks

Tnonkiconn

IC sockets

16 pin

IC sockets

14 pin

IC sockets

8 pin

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!

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

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.

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