Oakley 5U User manual

Oakley Sound Systems
5U Oakley Modular Series
Analogue Synthesiser Voice
PCB set issue 1
Builder's Guide
V1 14
Tony Allgood
Oakley Sound Systems
CARLISLE
United Kingdom

The suggested panel design for the 5U wide MOTM format module.
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The suggested panel design for the 4MU wide MU format module.
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Introduction
This is the roject Builder's Guide for the issue 1 Analogue Synthesiser Voice (ASV) module from
Oakley Sound. This document contains a basic introduction to the board set, a full parts list for the
components needed to populate the boards and how to connect the boards together.
For the User Manual, which contains an overview of the operation of the unit and the calibration
procedure, please visit the main project webpage at:
http://www.oakleysound.com/asv.htm
For general information regarding where to get parts and suggested part numbers please see our
useful arts Guide at the project webpage or http://www.oakleysound.com/parts.pdf.
For general information on how to build our modules, including circuit board population, mounting
front panel components and making up board interconnects please see our generic Construction
Guide at the project webpage or http://www.oakleysound.com/construct.pdf.
The prototype ASV built onto a MOTM format panel with issue 1.1 main board issue 1 VCO board issue 1 socket
board and issue 1 pot/switch board. Other issue 1 PCBs will be similar.
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The original issue 1 Pot/Switch board. Other issues are built in a similar way.
The ASV was the first Oakley module to use vertically mounted pots and switches. This type of construction allows
for much shallower modules.
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arts Lists
For general information regarding where to get parts and suggested manufacturer part numbers
please see my useful arts Guide at the project webpage or http://www.oakleysound.com/parts.pdf.
The components are grouped into values, the order of the component names is of no particular
consequence.
A quick note on European part descriptions. R is shorthand for ohm. K is shorthand for kilo-ohm.
So 22R is 22 ohm, 1K5 is 1,500 ohms or 1.5 kilohms. For capacitors: 1uF = one microfarad =
1000nF = one thousand nanofarad.
To prevent loss of the small ‘.’ as the decimal point, a convention of inserting the unit in its place is
used. eg. 4R7 is a 4.7 ohm, 4K7 is a 4700 ohm resistor, 6n8 is a 6.8 nF capacitor.
ASV Main Board issue 1.1 arts List
Resistors
1% 0.25W metal film types are recommended for most values. R63, R64, R67 and R68 should be
high precision 0.1% or better.
R35 is a positive temperature coefficient resistor with a nominal value of 1K and temp. co. of
anywhere between +3000ppm/K and 3900ppm/K. Alternatively, it can be a standard 1K resistor if
you don't mind a small amount of temperature dependant drift in the centre frequency of the VCF.
lease note that some resistors are different depending on whether you a have an issue 1.1 or issue
1.2 ot Board, and if you are building your ASV in a MU or MOTM based format.
22R R79, R80
47R R109
220R R78, R74, R72, R160, R75
390R R25, R27, R31, R32, R85, R86
1K R149, R131, R139, R128, R141, R152, R130, R143, R142, R140, R159,
R153, R51, R129, R135, R137, R155, R136, R132, R146, R138, R144, R65
1K +3300ppm/K R35
2K2 R5, R16
4K7 R103, R125
6K8 R83, R88
10K R13, R126, R3, R10, R114, R113, R98, R28, R158
11K R161
12K R97, R15, R30, R33, R119, R50, R49
15K R59, R89, R127, R43, R44, R90, R107, R104, R29, R12
20K R105
22K R6, R9, R87, R8, R37, R36, R7
27K R24
30K R154, R157
33K R2, R20, R21, R52, R117
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36K R96, R106, R118, R133, R148
39K R163, R147, R156, R134, R162, R164, R150, R145
47K R1, R34, R23, R53, R54, R55, R84
68K R45, R42
75K R94, R58
100K R17, R18, R70, R66, R61, R62, R102, R111, R4, R19, R73, R69, R56, R108,
R121, R76, R60, R165, R81, R57, R95, R11
100K/0.1% R63, R64, R67, R68
120K R112, R115, R116
150K R38, R82
220K R22, R151
240K R110
300K R123
470K R124
680K R26
910K R48, R39
1M R41, R46, R77, R120, R14, R71, R122
For MOTM/Oakley format
This is to be used if you have already have older Oakley VCOs and want your ASV VCOs to
behave identically to the Key CV input. Anyone with a midiDAC issue 4 and older should also
build this version.
150K R40, R47
For MU/Synthesisers com format
This is to be used if you have a predominantly MU system and/or have an issue 5 Oakley midiDAC.
220K R40, R47
For use with an issue 1 1 Pot Board
100K R91, R92, R100, R101
180K R93, R99
For use with an issue 1 2 Pot Board
22K R93, R99
47K R91, R101
Do not fit R92 and R100. Leave these two spaces empty.
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Capacitors
100nF axial multi-layer ceramic C43, C23, C42, C19, C9, C66, C24, C27, C18, C28, C22, C40,
C53, C33, C1, C34, C59, C12, C52, C11, C69, C17, C38, C44,
C25, C14, C67, C2, C56, C46, C21, C30, C4, C50, C41, C39,
C49, C26, C54, C45, C48, C68
10pF C0G ceramic 2.5mm C13
33pF C0G ceramic 2.5mm C6, C29, C31
220pF C0G ceramic 2.5mm C36, C37, Cx*
470pF C0G ceramic 2.5mm C5, C8, C47, C55, C57
10nF polyester film C62
22nF polyester film C64, C65
39nF polyester film C61, C63
330nF polyester film C7
220nF polyester film C51
680nF polyester film C15
1uF, 63V electrolytic C60
2u2, 63V electrolytic C3, C10, C16, C20
10uF, 35V electrolytic C58
47uF, 25V electrolytic C32, C35
* Cx is only fitted to the underside of the board between pins 1 and 2 of U16 if you are using the
main board with an issue 1.1 ot Board. It is not needed with issue 1.2 ot Boards. See later for
details.
Trimmers
10K multiturn trimmer SCL1, SCL2
100K multiturn trimmer TUN1, TUN2
200K multiturn trimmer OCT1, OCT2
10K 6mm trimmer F_SCL
50K 6mm trimmer A_LVL
100K 6mm trimmer F_OFF1, F_OFF2, A_OFF, F_FREQ, LFO_RNG
Discrete Semiconductors
1N4148 silicon signal diode D1, D2, D3, D4, D5, D6, D7, D8, D11, D12, D13, D14, D16,
D17
BAT42 Schottky signal diode D15, D18
1N5819 Schottky power diode D9, D10
BC550 N N transistor Q3, Q7, Q8
BC560 N transistor Q1, Q2, Q4, Q9, Q10
J201 FET Q5, Q6
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Integrated Circuits
CD4013 dual D-type flip-flop U26
CD4093 quad NAND gate U21
4558 dual op-amp U10
AS3310 envelope generator U24, U25
LM13700 dual OTA U8, U14, U15
LM4040-10 10V reference U2
LT1013 dual op-amp U3, U11, U19
O A2134 dual audio op-amp U12
TL072CN dual op-amp U22, U6, U16, U17, U13, U20
TL072AC dual op-amp U4, U18
78L12 100mA +12V regulator U1, U7
79L05 100mA -5V regulator U23
79L12 100mA -12V regulator U5, U9
Miscellaneous
Ferrite bead L1, L2, L3, L4
MTA100 3 way BUS
MTA100 2 way OUT
MTA100 6 way WR1, WR2
MTA156 4 way SU1, SU2
2 x 8 way 0.1” boxed header * HDR1, HDR2, HDR3
10-way SIL 0.1” socket ** CN1, CN2, CN3, CN4, CN5, CN6, CN7, CN8
10-way SIL 0.1” header OSC1, OSC2, OSC3
* If you have bought polarised headers for HDR1, HDR2 and HDR3, then they must be aligned
correctly. in 1 lines up with the square pad on the CB. in 1 is normally depicted by a small
triangle on the body of the header.
** CN1 to CN8 mounted on the underside of the board, facing down, and soldered from the top.
IC sockets are optional but recommended for DIY projects. There are thirteen 8-pin, two 14-pin and
five 16-pin DIL sockets used on the main board.
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The two sets of transistor pairs Q3 and Q4 and Q9 and Q10 can be tied together with a cable tie to help keep
both devices at a similar temperature. This reduces the amount of drift in the filter's and LFO's operating
frequencies.
These boxed IDC headers are polarised as they have a notch taken out of the side to ensure an inserted socket is
fitted the correct way around. They are fitted to the topside on the main board and on the underside of the socket
board.
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