Beast-Tek Instruments MICROBE v1.2 User manual

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MICROBE v1.2
BUILD GUIDE
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Microbe Main (CPU) Board BOM
IC1 MCP602/MCP6022 High precision op-amp 1
IC2 ATMEGA328P-PU 1
IC3 7805 5v 1A Voltage Regulator 7805 1
IC4 79L05 -5v 0.1A Voltage Regulator 79L05 1
D1, D2 IN4004 Power Diode IN4004 2
T1, T2, T3 2N3904 Transistor 2N3904 3
C2, C10 100uf Electrolytic LOW ESR Capacitor 100uf 2
C3 22uf Electrolytic LOW ESR Capacitor 22uf 1
C1, C4, C5, C6 , C7, C11 100nf Blue Monolithic Capacitor 104 6
C8, C9 22pf Ceramic Capacitor 22 2
Q1 20mhz Crystal 1
R1 100uH Inductor R.F. Choke 1
R4 1K Ohm Resistor 1% Brown-Black-Black-Brown-Brown 1
R2, R6 ,R11, R12 10K Ohm Resistor 1% Brown-Black-Black-Red-Brown 4
R3, R7, R10, R14, R16 100K Ohm Resistor 1% Brown-Black-Black-Orange-Brown 5
R13,R15,R17,R18 200K Ohm Resistor 1% Red-Black-Black-Orange-Brown 4
R5, R8, R9 1M Ohm Resistor 1% Brown-Black-Black-Yellow-Brown 3
JP1, JP2 8 Way Pin Header Single Row FEMALE 2
EXPAND 4 Way pin header dual Row MALE 1
ICSP ICSP - do not populate
POWER Shrouded 10pin (2x5) IDC Header (Eurorack Power) 1
Microbe IO Board BOM
R5, R6, R7, R8, R9, R10, R11, R12 1K Ohm Resistor 1%
Brown-Brown-Black-Black-
Brown 8
R13, R14, R15, R16, R17, R18, R19, R20,
R21 1K2 Ohm Resistor 1% 9
C1, C2 100nf Blue Monolithic Capacitor 104 2
IC1, IC2 74HC595 2
LED9 10mm High Brightness White Led 1
LED1-LED8 3mm High Brightness White Led 8
R1, R2, R4 9mm Round shaft 10KB Potentiometer 3
R3 9mm T18 shaft 10KB Potentiometer 1
JP1, JP2 8 Way Pin Header Single Row MALE 2
PJ301BM "Erthenvar" 3.5mm Mono
Jack 13

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1. Install and solder 10K resistors R2, R6, R11 and R12
2. Install and solder 100K resistors R3, R7, R10, R14, R16

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3. Install and solder 200K resistors R13, R15, R17, R18
4. Install and solder 1M resistors R5, R8 and R9

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5. Install and solder 1K resistor R4
6.Install and solder the inductor R1

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7. Install and solder power diodes and IC sockets (cut sockets from machine pin strips using a sharp craft
knife or side cutters)
8. Install and solder 20 mhz crystal Q1

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9. Install and solder 100nf capacitors C1, C4, C5, C6, C7, C11
10. Cut 2 x 4 pins from the male pin header strip and solder into the expand header

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11. Install and solder 22pf capacitors C8, C9
12. Install and solder 10 pin IDC header (Eurorack power)

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13. Install and solder IC4 79L05 and the 3 x 2n3904 transistors. IMPORTANT – make sure you sort the
79L05 from the transistors before installation and soldering!!!!
14. Install and solder IC2 7805 voltage regulator

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15. Install and solder 100uf capacitors C2 and C10
16. Install and solder 22uf capacitor C3. Cut 2 x 8 pin sections from the MALE header pin strip and solder
in place on reverse side of board.

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17. Insert the ATMEGA328p and the MCP602 .. be careful to make sure they are installed in the correct
direction!!
18. Install and solder the 1K resistors R5, R6, R7, R8, R9, R10, R11 and R12

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19. Install and solder the 1.2K resistors R13, R14, R15, R16, R17, R18, R19, R20, R21
IMPORTANT!!! – Resistors R19, R20 and R21 are positioned extremely close to some of the jacks. To
prevent short circuit from these resistors to the metal body of the jacks make sure you solder R19, R20
and R21 from the TOP of the board, so the entire leg can be clipped off on the bottom
20. Install and solder the IC sockets (cut from machine pin strips)

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21. Install the two 100nf capacitors C1 and C2. Cut two 8 pin strips from the FEMALE header pin strip
and solder into place.

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22. Install the potentiometers being careful to place the T18 knurled shaft to the correct location.
IMPORTANT!!!! – DO NOT SOLDER THE POTS they will sit happily in place for now.
23. Install the thirteen jacks. DO NOT SOLDER YET!!!

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24. Place the clear acrylic panel over the top of the pots and jacks and wiggle it around so that the jacks
and pots sit neatly. CAREFULLY flip together then solder ONLY THE GROUND PIN of the jacks to hold
them in place!! DO NOT solder the other jack pins AND DO NOT solder and of the pots YET!
25. Once one pin of the jacks has been soldered, they will stay in place. Remove the clear acrylic panel
and install two of the 6mm M3 screws and attach the 11mm brass stand offs on the other side. Install
the two remaining IC’s.

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26. Install the nine leds. The eight 3mm leds are all oriented the same direction. Orientation is shown in
the diagram below. Remember the shorter lead is negative and the longer lead is positive.
27. Peel the protective coating from the clear acrylic sheet. Place the front panel on top of the clear
acrylic panel. Now place over the jacks and pots and wiggle things into place so the panel sits nicely.
DON’T put any nuts on the jacks or pots yet. First push the big 10mm LED via its leads through the panel.
Next work through the eight 3mm leds pushing them through one by one so they are flush with the
panel. If you put any nuts on the jacks or pots, you will need to remove them so that the LEDs can be
pushed through the panel without issue. Once all LEDs and pushed through and sitting nicely in the
panel, install one jack nut and finger tighten it to hold the panel loosely in place.

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28. With the jack nut holding the front panel in place, give everything a wiggle around so that everything
is sitting nicely. Take time and inspect that all the jacks and pots are sitting nicely. Now install washers
and nuts on the four potentiometers and tighten (but don’t over tighten, the pots aren’t soldered and if
you tighten them too much the pot leads will bend).
Now install the remaining nuts on all of the jacks, giving each one a wiggle as tightening up so that they
all sit flush. Give everything a final wiggle and make sure everything is seated well. The panel and
sockets are still reasonable flexible until everything is soldered in.
Once you are happy that everything is seated correctly and flush, flip the panel over and solder all of the
remaining jack pins and the pots and LEDs into place.
29. Take time to check both boards for missing solder joints or sloppy solder joints. If everything looks
okay, its time to join them together. Join the two boards together via the pin headers and use two 6mm
M3 screws to secure them together (via the brass stand offs).

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30. Double check and make sure everything is correct and looks right. Once you are happy its time to
power on and test!

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