Thonk Spring Reverb Bedienungsanleitung

October 25th 2013 www.thonk.co.uk 1

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

OVERVIEW

For the most recent version of this

document please visit

http://thonk.co.uk/documents/springreverb/

For all technical support please visit

http://bit.ly/196uq9j on Muffwiggler.

This document must be read in conjunction

with the Music Thing Modular user manual

http://bit.ly/197HL0U

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

October 25th 2013 www.thonk.co.uk 2

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

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/

October 25th 2013 www.thonk.co.uk 3

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

SPRING REVERB BUILD INSTRUCTIONS

Start by emptying the Resistors and

Capacitors bag into one bowl or

container and the Main Bag into

another. This makes it much easier to

pick parts as you need them and

you’re less likely to lose anything.

Start with the front PCB as pictured.

The first job is to solder all the

resistors that are positioned

horizontally. These are:

•1k x1

•2.2k x3

•6.8k x2

•10k x1

•47K x1 (R7 – value not marked)

•100k x4

10K

6.8K

2.2K

47K

2.2K

6.8K

100K

October 25th 2013 www.thonk.co.uk 4

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

Next solder the four 100n capacitors.

They come in a strip of 8 parts and

are Dark Yellow in colour rather than

blue as shown in the PCB image.

Next solder the single 1nf capacitor in

the position shown.

Next solder the single 22pf capacitor

in the position shown.

Next solder the two large red 33nf

capacitors in the positions shown.

October 25th 2013 www.thonk.co.uk 5

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

Take the protective pink ESD bag

with yellow sticker out of the main

bag and find the 2N3904 transistor.

The middle lead needs to be bent

slightly towards the semi-circular face

of the transistor body, the component

should sit in a ‘tripod’ configuration

on the three leads.

NOTE! Do not solder the 78L05

voltage regulator into this position!

Apart from the text marking it looks

identical.

NOTE! Do not heat this part

excessively or you will damage it,

you should be aiming to solder

quickly and neatly.

Next take the Vactrol from the Main

Bag and solder into place as shown.

The orientation of the 4 pins is vital.

The Vactrol should be completely flat

to the top surface of the PCB and sit

within the boundary of the PCB.

NOTE! Do not heat this part

excessively or you will damage it, you

should be aiming to solder quickly

and neatly.

If you use organic solder that can be

washed with water then now is the

perfect time to do that. Make sure

you leave your PCB to dry in a warm

place for at least 30 minutes before

progressing further.

October 25th 2013 www.thonk.co.uk 6

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

10.

Next you should solder in the 8 pin

and 14 pin IC sockets. Make sure

these sockets are soldered flush and

perpendicular to the PCB surface.

__________________________________

Then solder the 4 remaining vertically

positioned resistors:

•10K x1

•47K x2

•100K x1

Solder each pair of vertical resistors

so they are in a mirrored

configuration. This removes the

chance of them hitting each other and

shorting.

11.

Now flip the board over and solder

the one of the four 10uF Electrolytic

Capacitors into place.

NOTE! Orientation is vital on this part.

The grey stripe should be positioned

as shown and the longer lead of the

component should go into the hole

marked + on the PCB.

100K

10K

47K

Notch!

October 25th 2013 www.thonk.co.uk 7

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

12.

Next solder the 5 pin female socket

into position.

13.

Next you need to make a small

modification to the 3 pots. You need

to snap, cut or file off the small metal

tag that protrudes from the top

surface of the pot body as indicated.

The easiest way is to snap off with

pliers, it comes off very easily. If you

cut or file it off be careful not to

damage the thread on the shaft.

14.

Next you need to make a small

modification to two of the four 3.5mm

jacks sockets.

You need to cut off a small section on

one side of the grounded metal

shroud that surrounds the plastic

body of the jack. Do not cut off any of

the other tabs of metal.

If you don’t have anything you can

cut these with you can also just bend

this small section away from the body

of the jack.

NOTE! This is done otherwise it is

possible (although not 100%) that a

short circuit is made with the wiring

pads that sit at the very end of the

PCB. These wiring pads are not used

in this build.

October 25th 2013 www.thonk.co.uk 8

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

15.

Next position the four jacks and three

pots and single LED in place on the

board but DO NOT SOLDER any of

them yet.

The LED is in the pink ESD bag with

yellow sticker. It won’t actually stand

upright from the PCB as shown in the

image yet, it’ll just drop down.

NOTE! Ensure the the longer lead on

the LED goes into the square hole

marked with a +

DO NOT SOLDER YET!

16.

Put the three plastic washers on the

pot shafts.

Ensure black face of

the jack faces this way

B50K

B10K

LED

Modified Jacks

(step 13)

October 25th 2013 www.thonk.co.uk 9

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

17.

You didn’t solder the pots and jacks

yet did you? Good!

Put the faceplate on (White PCB

material or Aluminium) and tighten a

few nuts on to make sure everything

is sitting true and flat.

Now solder the pots and jacks (not

the LED yet, and make sure it doesn’t

fall out in the process). There are 5

solder points per pot and 4 solder

points per jack. 31 solder joints in

total.

NOTE! It’s easy to accidentally miss a

joint at this point, so I advise double

checking the 31 joints again after

you’ve finished

18.

The LED should still be loose. Push it

up through the hole in the panel and it

should hold in place. Solder it.

Remove the front panel again. Be

careful to not bend the LED as it’s

quite exposed now.

October 25th 2013 www.thonk.co.uk 10

Music Thing Modular

Spring Reverb Module

Eurorack DIY Kit

Instructions

Version 0.9

19.

Go back to the ESD bag and take out

the TL074CN and NE5532P IC’s.

In order to fit them into the IC sockets

you need to bend the pins inward

slightly.

Do this with a pair of pliers, or If

you’re careful you can bend each row

manually on the top of table.

The pins ideally should be

perpendicular to the body of the IC.

Fit the IC’s in the positions shown.

NOTE! You will wreck the IC’s and

possibly other components if you

power up with them in backwards.

NOTE, the below image is ROTATED

compared to previous images.

You have finished with this PCB for now,

it’s time to switch to the other one.

Notch!

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