Thonk Loose Fruit Manuel utilisateur

Jan 9th 2019 www.thonk.co.uk 1

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

OVERVIEW

For the most recent version of this

document please visit

https://www.thonk.co.uk/documents/gbox

This document has hi-res images. ZOOM

IN for a closer look

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

always helpful for checking for bad solder joints and continuity. Thonk sell a

range of inexpensive tools here - http://bit.ly/1jxqF3n

Jan 9th 2019 www.thonk.co.uk 2

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

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/

Jan 9th 2019 www.thonk.co.uk 3

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

LOOSE FRUIT BUILD INSTRUCTIONS

There are two PCBs used in this

build - they are referred to as the

top board and the bottom board.

They can be identified by locating

the text on each PCB as shown.

The bottom board has a diagonal

corner cut off.

Start off by soldering in all the resistors to both the top and bottom boards -

it’s recommended to do this gradually – one value at a time.

Jan 9th 2019 www.thonk.co.uk 4

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

Next solder in the six 1N4148

diodes. These are labelled on the

PCB as: ’48

Do not confuse these with the

zener diodes which are also

coloured orange and black.

NOTE: Take care with the

orientation of the black stripes on

the diodes – these should match

the thick white lines on the PCB

silkscreen.

NOTE: Do not heat the diodes

excessively or you will damage

them, you should be aiming to

solder quickly and neatly.

Next solder in the three 5.1 Zener

diodes. These are labelled on the

PCB as 5.1

NOTE: Take care with the

orientation of the black stripes on

the diodes – these should match

the thick white lines on the PCB

silkscreen.

Next solder in the two 1N4001

diodes. These are black with a

silver stripe.

NOTE: Take care with the

orientation of the silver stripes

which should match the thick white

lines on the PCB silkscreen.

Jan 9th 2019 www.thonk.co.uk 5

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

Now take the top board and solder

the two 150pF ceramic capacitors.

Now move to the bottom board

and solder the three 22pF ceramic

capacitors.

Next solder the four 470pF

ceramic capacitors.

Now solder the crystal oscillator.

Orientation does not matter for this

part.

Jan 9th 2019 www.thonk.co.uk 6

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

10.

Next solder in the IC sockets on

both PCBs. Make sure these

sockets are soldered flush and

perpendicular to the PCB surface.

The notch on each socket should

match the PCB silkscreen as

shown in the pictures.

11.

Next solder the three 1n ceramic

capacitors on the top board

12.

Now solder the twenty-two

100n ceramic capacitors.

Jan 9th 2019 www.thonk.co.uk 7

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

13.

Next solder in the double standing

ferrite bead. Orientation does not

matter for this part.

14.

Next take one of the 2x5 male

headers and one of the 2x3 male

headers. These should be soldered

on the back of the bottom board as

shown.

NOTE! Make sure these headers

are soldered on the opposite side

of all other components on the

bottom board as shown in the

picture.

Bottom Board

15.

Now solder in the two 10uF

Electrolytic Capacitors located on

the top board.

NOTE! Orientation is vital on this

part. The grey stripe and shorter

leg signify the negative side of the

capacitor, the longer lead of the

component should go into the hole

marked + on the PCB.

Jan 9th 2019 www.thonk.co.uk 8

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

16.

Next solder the four 22uF

Electrolytic Capacitors - there are

two on each PCB.

NOTE! Orientation is vital on this

part. The grey stripe and shorter

leg signify the negative side of the

capacitor, the longer lead of the

component should go into the hole

marked + on the PCB.

17.

Next solder the single LM78L05 on

the bottom board as shown.

NOTE! Orientation matters – be

sure to match the curve of the

body to the PCB silkscreen.

Do not heat these 3-legged parts

excessively or you will damage them,

you should be aiming to solder quickly

and neatly.

18.

Now solder in the six 2N3904

transistors on the bottom board.

NOTE! Orientation matters – be

sure to match the curve of the

body to the PCB silkscreen.

19.

Now solder the two 2N3906

transistors on to the top board.

NOTE! Orientation matters – be

sure to match the curve of the

body to the PCB silkscreen.

Jan 9th 2019 www.thonk.co.uk 9

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

20.

Now solder the two J105 JFETs as

shown.

NOTE! Orientation matters – be

sure to match the curve of the

body to the PCB silkscreen.

21.

Next place and solder the

remaining male headers on the

bottom PCB - these are placed on

the same side as the resistors and

capacitors as shown.

These should be soldered flush

and perpendicular to the PCB

surface.

Bottom Board

NOTE! Don’t solder these headers to

the other side of the board like the

power header you already soldered!

22.

Now switch to the other PCB and

place but DO NOT SOLDER the

female headers on the top board.

The female headers sit on the

opposite side to all other

components as shown.

Before soldering these headers –

connect them to the male headers

you just soldered on the other

board. Once you have the PCBs

connected nicely with the headers

sitting flush you can then solder

them in place.

Now is also a good time to screw

the hex spacers onto the top PCB.

SWITCH TO OTHER PCB!

Top Board

Jan 9th 2019 www.thonk.co.uk 10

God’s Box – Loose Fruit

Eurorack DIY Kit

Instructions

Version 1.1

23.

Now disconnect the PCBs and fit

all the ICs into their sockets as

shown.

NOTE! Orientation is vital for all ICs

For the TL052 and TL072 ICs make

sure the black circle on the top

face of the IC is facing the end with

the notch in the IC socket as

pictured.

For all other chips make sure the

notch in the chip is at the side with

the notch in the IC socket.

24.

Next locate the two LEDs.

When viewing the LED bulb from

above or below, you should notice

that one side of the bulb has a

flattened edge.

The flat edge of the bulb must

match the flat edge on the PCB

silkscreen. Taking care of the

orientation - you can place the

LEDs – DO NOT solder them in yet!

TL072

TL074

TL052

TL072

TL052

TL072

Firmware

V2164D

TL072

LED Flat

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