Thonk TouellSkouarn Strakal Brulu User manual

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October 25th 2013 www.thonk.co.uk 1
TouellSkouarn
Strakal Brulu Module
Eurorack DIY Kit
Instructions
Version 1.0
OVERVIEW
For the most recent version of this
document please visit
http://www.thonk.co.uk/documents/strakal
For all technical support please visit
http://bit.ly/1h4aVPk on Muffwiggler.
The Strakal Brulu manual is here
http://www.thonk.co.uk/documents/strakal/
StrakalBrulu_ReGrenvEo.pdf
All Thonk kits are sold under our standard Terms and Conditions -
http://www.thonk.co.uk/faq/
DIY INSTRUCTIONS
This document gives detailed instructions that assume you have purchased a
complete kit from www.thonk.co.uk. It also assumes no previous knowledge
of electronics. To learn to solder try http://youtu.be/I_NU2ruzyc4 and the
Adafruit guide to excellent soldering – http://bit.ly/1l77tF4!
Watch and understand that whole YouTube video! If you’re not achieving the
results shown in the video then you need to buy new tools or seek advice.
You will not end up with a working module otherwise.
TOOLS REQUIRED
Soldering iron, snipe nose pliers, wire strippers, small flat head screwdriver
and diagonal cutters AKA snips AKA side-cutters. A Digital Multimeter is
necessary for calibrating this module accurately but you can do it by ear to
taste. Thonk sell a range of inexpensive tools here - http://bit.ly/1jxqF3n
IF YOUR KIT IS DATED 2016
CLOSE THIS DOCUMENT AND
DOWNLOAD THE V1.3.1 MANUAL
INSTEAD:
thonk.co.uk/documents/strakal/

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October 25th 2013 www.thonk.co.uk 2
TouellSkouarn
Strakal Brulu Module
Eurorack DIY Kit
Instructions
Version 1.0
SOLDER JOINTS
Your solder joints should look like those shown as ‘OK’ below, they should
have that neat conical shape on BOTH sides of the PCB. If they don’t look
the same on both sides then stop! Work out why from the soldering guides
linked and don’t continue until you are getting those results.
This isn’t just OCD talking, you are very likely to end up with a destroyed,
damaged or defective unit if you’re not hitting that standard.
This photo is from the Adafruit guide to excellent soldering -
http://bit.ly/1jxqF3n and is reproduced under an Attribution-Sharealike
creative commons license - http://creativecommons.org/licenses/by-sa/3.0/

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October 25th 2013 www.thonk.co.uk 3
TouellSkouarn
Strakal Brulu Module
Eurorack DIY Kit
Instructions
Version 1.0
STRAKAL BRULU BUILD INSTRUCTIONS
1.
Start by emptying BAG A into a bowl
or container. This makes it much
easier to pick parts as you need
them and you’re less likely to lose
anything.
2.
The first job is to solder all the
resistors.
3.
Start by soldering the single 1K
resistors in position R18.
4.
Solder the two 100R resistors in
positions L1 and L2.
5.
Solder the two 100K resistors in
positions R4 and R13.

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October 25th 2013 www.thonk.co.uk 4
TouellSkouarn
Strakal Brulu Module
Eurorack DIY Kit
Instructions
Version 1.0
6.
Solder the two 1M resistors in
positions R7 and R8.
7.
Solder the single 220R resistor in
position R9.
8.
Solder the single 390R resistor in
position R17.
9.
Solder the single 470R resistor in
position R1.
10.
Solder the single 12K resistor in
position R16.
11.
Solder the single 15K resistor in
position R15.

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October 25th 2013 www.thonk.co.uk 5
TouellSkouarn
Strakal Brulu Module
Eurorack DIY Kit
Instructions
Version 1.0
12.
Solder the single 33K resistor in
position R2.
13.
Solder the five 47K resistors in
positions R5, R10, R11, R12, R14
14.
Solder the three 4.7K (4K7) resistors
in positions R6, R19, R20. You
should now have no resistors left.
15.
Solder the two 8 pin IC sockets.
Ensure the notches in the sockets
match the silkscreen.
16.
Solder the Vactrol.
Note the orientation of the text on
the Vactrol.
The plus symbol on the PCB should
be closest to the yellow dot on the
Vactrol body.
Note also that on one side of the
Vactrol the leads are further apart,
this end of the vactrol is positioned
closer to the edge of the PCB.
NOTE! – The orientation is vital.