Thonk Eurorack DIY Kit Instructions Manual Download Page 3 | Manualshive

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December 14th 2018

www.thonk.co.uk

3

PROK DRUMS

Eurorack DIY Kit

Instructions

Version 1

PROK DRUMS BUILD INSTRUCTIONS

1.

There are two PCBs used in this
build - they are referred to as the
front  PCB  and  the  back  PCB.
They  can  be  identified  by
locating the text on each PCB as
shown.

BACK BOARD

2.

We will start with the back PCB.

All  the  parts  for  this  PCB  are
located  in  a  labelled  bag  within
the main kit bag. Empty this bag
into  a  bowl  or  container  –  all
other parts can be put to the side
for  the  moment  except  for  the
Teensy.

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Summary of Contents for Eurorack DIY Kit

Page 1: ...t 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 snip...

Page 2: ... 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 ...

Page 3: ...hey are referred to as the front PCB and the back PCB They can be identified by locating the text on each PCB as shown BACK BOARD 2 We will start with the back PCB All the parts for this PCB are located in a labelled bag within the main kit bag Empty this bag into a bowl or container all other parts can be put to the side for the moment except for the Teensy ...

Page 4: ...e 39K resistor into position R3 5 Next solder the three 56K resistor into positions R5 R6 and R7 6 Next solder the two 1N5819 diodes into position as shown NOTE Take care with the orientation of the grey stripes on the diodes these should match the black stripes 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 ...

Page 5: ...or which is packaged as shown Do not remove it from its packaging yet complete the next step first 8 Next locate the position for the SMD regulator on the PCB as shown 9 Now heat the single pad next to the text IC1 with your soldering iron and once heated add a small blob of solder just enough to cover the entire pad as shown ...

Page 6: ...is heated slide the regulator into position so that the three pins line up with the other pads see next image If you don t manage this first time round you can re flow the solder and reposition the regulator again NOTE Make sure the component is flush and perpendicular to the PCB surface as you slide it in place NOTE Do not heat this part excessively or you will damage it you should be aiming to s...

Page 7: ...he two IC sockets The notch on each socket should match the PCB silkscreen as shown Make sure these sockets are soldered flush and perpendicular to the PCB surface 14 Now take the 2x5 male header and the 2x3 male header These should be soldered on the bottom of the back PCB as shown NOTE These headers are soldered on the opposite side of all other components soldered so far 15 Next locate and sold...

Page 8: ...t The grey stripe and shorter leg signify the negative side of the capacitor the short lead of the component should go into the round hole marked minus on the PCB 17 Next solder in the single 150pF capacitor into C1 18 Now locate the Teensy this build uses a Snare Drum but the procedure is the same for all Prok modules The Teensy included comes pre programmed with the Prok Drums software ...

Page 9: ...e If you look very closely or with a magnifying glass you will see that there is a tiny trace between the two pads This is the USB power trace which we cut in the next step 20 Use a craft knife or scalpel to cut the USB power trace One pass with the blade should be sufficient After cutting the trace use a multimeter or a magnifying glass to check there is no longer any connection between the pads ...

Page 10: ...to the Teensy as shown then carefully solder the pins Make sure the pins are soldered flush and perpendicular to the PCB surface 23 Next take the three 20 pin female headers and cut them to the following lengths 1 x 14 pin length 1 x 13 pin length 1 x 2 pin length 1 x 11 pin length 1 x 7 pin length Be careful when cutting these down it s better to cut too large and then trim down rather than cut t...

Page 11: ...ll 29 pins are snugly fitted together you can then flip the PCB over and solder the female pins in place 26 Next take the TL072 and MCP6002 IC chips and place them as shown NOTE Orientation is vital for all ICs For the TL072 make sure the black circle on the top face of the IC is facing the end with the notch in the IC socket For the MCP6002 match the notch on the chip with the IC socket 27 Now pu...

Page 12: ...n the front board start by soldering in the two 470R resistors into R17 and R18 29 Next solder the single 100K resistor into R19 30 Now solder four of the five 1 5K resistors into R11 R12 R14 and R15 31 Next solder one of the two 56K resistors into R9 32 Now solder one of the three 27K resistors into R8 ...

Page 13: ... silkscreen NOTE Do not heat the diodes excessively or you will damage them you should be aiming to solder quickly and neatly 34 Next solder in the single 100n capacitor into C1 35 Next we will solder the four standing resistors starting with single remaining 1 5K resistor Bend the resistor lead as shown to prepare it to stand on the PCB then place it into the PCB at R13 with the bent lead facing ...

Page 14: ...s as shown in the picture with the bodies on opposite sides 38 Now take the remaining 56K resistor and solder it standing up into R20 as shown NOTE Be sure to solder the resistor body as shown in the picture with the lead facing the PCB edge 39 Next locate the round switch button Note that one side is flattened This needs to match the flat edge on the PCB silkscreen The real button does not have r...

Page 15: ...itch and SD card holder in place flat to the PCB surface Once everything is held securely you can then solder the parts to the PCB NOTE Do not use regular tape as it will leave a sticky residue on the panel only use masking or non stick tape to hold the parts in place NOTE The SD card holder has very fine pins be slow and patient when placing and soldering this part in 42 Now remove the front pane...

Page 16: ...der pins into the holes as shown Then solder the female header pins onto the back board 45 Now take the two PCBs apart again and locate the four square LEDS NOTE One LED leg is longer than the other Orientation is vital for this part the long positive leg must go to the round pad marked plus The negative leg goes to the black stripe on the PCB 46 Now place the LEDs minding the correct orientation ...

Page 17: ...e held nicely level with the front of the panel you can then solder them in place NOTE Do not use regular tape as it will leave a sticky residue on the panel only use masking or non stick tape to hold the parts in place 48 Now join the both the PCBs together again and place the two knobs onto the pots 49 The module is now complete Affix the power cable as shown with the red stripe facing the PCB t...

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