Seb's Synth-DIY Pages

4xD - Parts list


Click to view printable version of this page

Here is a complete BOM for the 4xD PCB.  If you are having trouble with a particular
part, just ask () and I will add some more information here.

QTY  PART-REFS                     VALUE          
---  ---------                     -----          
Resistors
---------
16   R1,R3,R4,R37,R41,R42,R44      10K    (0805 SMT 1% 100ppm/C)
     R107,R116,R117,R118,R119,
     R120,R121,R122,R123
10   R6,R7,R16,R17,R49,R50,R55,    10K    (1% 50ppm/C)
     R56,R62,R63
4    R39,R45,R112,R113             10K    (1% 50ppm/C - only needed to add analog CV inputs)
2    R2,R43                        47K    (0805 SMT 1% 100ppm/C)
12   R5,R18,R26,R32,R38,R48,R57,   47K    (1% 50ppm/C)
     R64,R70,R78,R82,R84
8    R8,R10,R12,R14,R51,R53,R58,   634R   (1% 50ppm/C)
     R60
8    R9,R11,R13,R15,R52,R54,R59,   91R    (1% 50ppm/C)
     R61
4    R19,R27,R65,R73               4K42   (1% 50ppm/C)
4    R20,R28,R66,R74               1K33   (1% 50ppm/C)
4    R21,R29,R67,R75               2K32   (1% 50ppm/C)
4    R22,R30,R68,R76               715R   (1% 50ppm/C)
4    R23,R33,R71,R79               4K99   (1% 50ppm/C)
5    R24,R34,R72,R80,R102          1K5    (1% 50ppm/C)
4    R25,R31,R69,R77               560R   (1% 50ppm/C)
4    R35,R36,R40,R46               1K     (1% 50ppm/C)
4    R47,R81,R83,R85               36K    (1% 50ppm/C)
8    R86,R87,R88,R89,R90,R91,R92,  300R   (1% 50ppm/C)
     R93
3    R94,R95,R96                   2K2    (0805 SMT 1% 100ppm/C)
5    R97,R99,R100,R101,R103        220R   (1% 50ppm/C)
2    R98,R105                      680R   (1% 50ppm/C)
1    R104                          240R   (1% 50ppm/C)
1    R106                          39R    (1% 50ppm/C)
4    R108,R109,R114,R115           100K   (1% 50ppm/C)
2    R110,R111                     5.6R   (1% 50ppm/C)

Capacitors
----------
24   C1,C2,C3,C5,C7,C9,C38,C39,    100nF  (0805 SMT ceramic)
     C41,C43,C45,C47,C104,C105,
     C106,C107,C108,C109,C110,
     C111,C112,C113,C114,C115
13   C49,C73,C74,C75,C76,C77,C78,  100nF  (Axial multilayer ceramic)
     C82,C85,C86,C100,C116,C118
12   C4,C6,C8,C13,C36,C37,C42,C44, 1uF    (0805 SMT ceramic)         
     C46,C101,C102,C103
2    C10,C48                       47uF   (Radial electrolytic, 0.1" pitch)
2    C11,C12                       39pF   (Low K Ceramic disc)
17   C14,C22,C50,C54,C56,C59,C88,  10uF   (Radial electrolytic, 0.1" pitch)
     C89,C90,C91,C92,C93,C94,C95,
     C96,C97,C99
1    C83                           10uF   (Tantalum, 0.2" pitch)
2    C15,C119                      10nF   (Axial multilayer ceramic)
12   C16,C17,C19,C20,C26,C33,C51,  470pF  (Low K ceramic disc, 0.2" pitch)
     C52,C57,C64,C70,C98
4    C18,C23,C55,C60               2.7nF  (Polypropylene, 0.2" pitch)
4    C24,C30,C61,C67               2.2nF  (Polypropylene, 0.2" pitch)
4    C25,C31,C62,C68               6.8nF  (Polypropylene, 0.2" pitch)
4    C27,C34,C65,C71               1.5nF  (Polypropylene, 0.2" pitch)
8    C28,C29,C32,C35,C63,C66,C69,  22uF   (Radial electrolytic, 0.1" pitch)
     C72
1    C40                           2.2uF  (0805 SMT ceramic)
1    C81                           6800uF (Radial electrolytic, 16V, 0.3" pitch
                                           Depending on the AC input voltage you
                                           can get away with a smaller capacitor
                                           e.g. 2200uF or 4700uF)
2    C84,C87                       100uF  (Radial electrolytic, 0.1" pitch)

Integrated Circuits
-------------------
2    U1,U2                         dsPIC30F6012A-30I/PF  (TQFP64, 0.8mm pitch)
2    U3,U10                        IS62C1024AL-35QLI     (SOP32, 0.05" pitch, 0.45" wide body)
2    U4,U11                        CS4272-CZZ            (TSSOP28, 0.65mm pitch)
8    U5,U6,U7,U14,U15,U16,U20,U21  OPA2340PA(Z)          (DIP8, 0.1" pitch)
2    U8,U12                        OPA2340PA(Z)          (U8 and U12 only needed to add analog CV inputs)
1    U9                            PIC16F877A-I/PT       (TQFP44, 0.8mm pitch)
1    U22                           6N139                 (DIP8, 0.1" pitch)
1    U23                           LM317T                (TO220)
1    U24                           7805                  (TO220)

Transistors
-----------
3    Q1,Q2,Q3                      MMBT3904       (or any general purpose SOT-23 NPN
                                                   e.g. PMBT3904, SMBT3904, BSR17A)

Diodes
------
6    D1,D2,D3,D4,D15,D16           1N4002         (Rectifier diode)
2    D5,D6                         1N4148         (Signal diode)
4    CLIP-1,CLIP-2,CLIP-3,CLIP-4   CLIP LEDs      (3mm red)

Miscellaneous
-------------
1    7.5VAC                        7.5V AC
2    AN I/O 1,AN I/O 2             Analog CV Input
2    DIG I/O 1,DIG I/O 2           Digital I/O
3    DSPIC1,DSPIC2,UI PIC          ICSP/ICD
1    ENC1                          DELAY TIME 1   (Spectrol 110E series
1    ENC2                          DELAY TIME 2    rotary encoder 2 bit,
1    ENC3                          DELAY TIME 3    9 cycle, 36 detent,
1    ENC4                          DELAY TIME 4    horizontal mount
1    ENC5                          LFO RATE        P/N 110E1A48F209PC
1    ENC6                          LFO DEPTH       Farnell 3282284 or 1144742
1    ENC7                          LFO PHASE O/S   Vishay Spectrol Datasheet)
4    FB-1,FB-2,FB-3,FB-4           50K Log *      (Spectrol 248 series, Rapid 68-1294)
                                   * I have a feeling a Lin pot may work better -
                                   my experience using mine, which is built with Log
                                   feedback pots, is that the useful feedback range
                                   tends to be bunched up the top end of the pot
                                   position.
8    FB-RTN-1,FB-RTN-2,FB-RTN-3,   These sockets all connected
     FB-RTN-4,FB-SEND-1,FB-SEND-2, at the panel - not wired to
     FB-SEND-3,FB-SEND-4           PCB headers.
9    IN-1,IN-2,IN-3,IN-4, MIDI IN, 2-way PCB headers
     OUT-1,OUT-2,OUT-3,OUT-4
2    MIDI OUT,MIDI THRU            3-way PCB headers
1    LED1                          Kingbright Triple 7-segment LED display
                                   (Green, Common Anode, P/N BA56-12GWA, Rapid 57-0246)
1    FB1                           FERRITE BEAD   (Rapid 26-4865)
4    L1,L2,L3,L4                   3WAY-LINK
1    L9                            LINK
4    P1,P2,P3,P4                   PAD
1    SW1                           LFO SELECT     
1    SW2                           LFO WAVEFORM   
2    SW3,SW4                       PROG/DEBUG     (ALPS SSSS2 series, DPDT, PCB mount
                                                   Farnell 733581 or 1123870)
1    SW5                           ICD EN         (ALPS SSSS2 series, SPDT, PCB mount
                                                   Farnell 733568 or 1123869)
1    X1                            25.000 MHz     (20pF fundamental mode parallel resonant)
(All PCB headers are 0.1" pitch Molex KK or
 cheaper equivalent like JYK P2500-xx/H2500-xx)

More ..