Beast-Tek Instruments Mutagen V1.5 User manual

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Mutagen V1.5
BUILD GUIDE
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Mutagen IO Board BOM
IC1 74HC595 1
R1, R2 9mm Round shaft 10KB Potentiometer 2
R3 9mm Trimmer Potentiometer 10KB to 25KB 1
R17, R18, R19, R20, R21 220 Ohm Resistor 1% Red-Red-Black-Black-Brown 5
R4, R5, R6, R7, R8, R9,
R14 1K Ohm Resistor 1% Brown-Black-Black-Brown-Brown 7
R10, R11, R12, R13,
R15, R16 100K Ohm Resistor 1% Brown-Black-Black-Orange-Brown 6
L1, L2, L3 3mm Red LED 3
L4, L5 3mm Bi-colour LED (2 pin) 2
C1 100nf Blue Monolithic Capacitor 104 1
JP1, JP4 4 Way Pin Header Single Row MALE 2
JP2 8 Way Pin Header Single Row MALE 1
JP3 7 Way Pin Header Single Row MALE 1
PJ301BM "Erthenvar" 3.5mm Mono Jack 19

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Mutagen Main (CPU) Board BOM
IC1
74HC595
1
IC3 ATMEGA328P-PU 1
IC2, IC6, IC7, IC8, IC9, IC10,
IC11 MCP602/MCP6022 High precision op-amp 7
IC4 7805 5v 1A Voltage Regulator 7805 1
IC5
79L05
-
5v 0.1A Voltage Regulator
79L05
1
Q1
20mhz Crystal
1
R24
100uH Inductor R.F. Choke
1
C8, C9
22pf Ceramic Capacitor
22
2
D1, D2
IN4004 Power Diode
IN4004
2
C1, C2, C4, C5, C7, C10, C12,
C13, C14, C15, C16, C17, C18 100nf Blue Monolithic Capacitor 104 13
C3,
C6,
C11
100uf Electrolytic Capacitor
100uf
3
R12,
R13, R23
10K Ohm Resistor 1%
Brown
-
Black
-
Black
-
Red
-
Brown
3
R7, R8, R35, R37, R38, R39 100K Ohm Resistor 1% Brown-Black-Black-Orange-Brown 6
R1, R2, R3, R4, R5, R6, R9,
R10, R11 1M Ohm Resistor 1% Brown-Black-Black-Yellow-Brown 9
JP1, JP4
4 Way Pin
Header Single Row FEMALE
2
JP2
8 Way Pin Header Single Row FEMALE
1
JP3
7 Way Pin Header Single Row FEMALE
1
ICSP
ICSP
-
do not populate
CFG-A, CFG-B 2 Way Pin Header Single Row MALE 2
POWER
Shrouded 10pin (2x5) IDC Header (Eurorack Power)
1

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IO Board – Step 1
Install and solder the six 100K resistors R10, R11, R12, R13, R15 and R16

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IO Board – Step 2
Install and solder the seven 1K resistors R4, R5, R6, R7, R8, R9 and R14

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IO Board – Step 3
Install and solder the five 220R resistors R17, R18, R19, R20 and R21

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IO Board – Step 4
Cut two 8 pin pieces from the IC socket strip and solder and install into IC1

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IO Board – Step 5
Install and solder 100nf capacitor C1

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IO Board – Step 6
Cut two 4 pin, one 8 pin and one 7 pin pieces from the male pin header strip. Install and solder
into JP1, JP4, JP2 and JP3

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IO Board – Step 7
Using a 6mm M3 screw, attach the 11mm brass stand-off
IO Board – Step 8
The trimmer pot needs its mounting supports trimmed in half so that they will fit into the PCB
footprint. Use side cutters, go slow and be gentle.

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IO Board – Step 9
Install the three potentiometers into place – DO NOT SOLDER THEM YET

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IO Board – Step 10
Install the 74HC595 integrated circuit into IC1

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IO Board – Step 11
Seat the jacks (DO NOT SOLDER) and install the three red LEDs into L1, L2 and L3 along with the
two bi-color LEDs L4 and L5. Again do not solder them yet. You may need to gently ben the pins
on the LEDS to allow the board to rest on the desk unless you are using something to hold the
PCB off the desk.
Note: the longer pin on the LED is the positive pin which is marked with a + on the silkscreen.

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IO Board – Step 12
Carefully slide the panel over all of the seated components.

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IO Board – Step 13
Install a few of the knurled nuts (I did 6) firmly and install washers and nuts onto the two
bushed potentiometers – FINGER TIGHTEN only otherwise if you overtighten the
potentiometers will lift off the PCBS and/or twist. This was enough tension to allow me to flip
the board over to solder everything without it falling apart. Carefully test it out – you may need
to install knurled nuts onto more jacks to get more tension.

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IO Board – Step 14
Flip the board over and solder one pin of each jack and potentiometer to hold it into place. If
you bent the LED pins to sit it against the desk, bend them straight again. Direct the LEDs into
their holes and push them in firmly. Turn the board on its side and inspect the LEDs are seated
correctly and that everything is seated nicely. When you are happy that everything is seated
well, solder the rest of the remaining jack, pots and LEDs.

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IO Board – Step 15
Install the remaining knurled jack nuts. Now that the potentiometers are soldered in tight, you
can tighten the nuts but don’t go overboard.
Lastly install the two knobs and then move onto the Main board assembly.

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Main Board – Step 1
Install and solder the six 100K resistors R7, R8, R35, R37, R38 and R39

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Main Board – Step 2
Install and solder the three 10K resistors R12, R13 and R23

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Main Board – Step 3
Install and solder the nine 1M resistors R1, R2, R3, R4, R5, R6, R9, R10 and R11