Seb's Synth-DIY Pages

Fat Controller - Parts list


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Here is a complete BOM for the Fat Controller PCB.  Where people have had trouble finding
parts I have added links to suppliers, and in some cases alternative parts.  If you are having
trouble with a particular part, please just ask () and I will add some more
information here.

QTY  PART-REFS                     VALUE          
---  ---------                     -----          
Resistors
---------
1    R1                            4K99   (01% 15ppm/C)
1    R2                            29K4   (01% 15ppm/C)
2    R3,R11                        10K    (R3 01% 15ppm/C, R11 1% 50ppm/C)
1    R4                            23K2   (01% 15ppm/C)
1    R5                            23K7   (01% 15ppm/C)
3    R6,R9,R10                     220    (1% 50ppm/C)
1    R7                            680    (1% 50ppm/C)
1    R8                            1.5K   (1% 50ppm/C)
15   R12,R14,R17,R19,R21,R23,R25,  1K     (1% 50ppm/C)
     R27,R29,R31,R33,R35,R37,R39,
     R41
19   R13,R16,R18,R20,R22,R24,R26,  100    (1% 50ppm/C)
     R28,R30,R32,R34,R36,R38,R40,
     R42,R49,R50,R51,R52
1    R15                           51     (1% 50ppm/C)
3    R43,R45,R47                   4K3    (1% 50ppm/C)
3    R44,R46,R48                   2K     (1% 50ppm/C)

Capacitors
----------
4    C1,C2,C23,C28                 22uF   (Radial electrolytic)
12   C3,C5,C6,C24,C25,C46,C47,C48, 100nF  (Axial multilayer ceramic)
     C49,C50,C51,C57
1    C4                            10uF   (Radial electrolytic)
1    C7                            2.7pF  (Ceramic disc)
16   C8,C9,C10,C11,C12,C13,C14,    10nF   (LCR box-type radial polystyrene
     C15,C16,C17,C18,C19,C20,C21,          Farnell 3358951 or 9520830
     C22,C45                               Except for C45 which is ceramic
                                           disc or 0.2" pitch polyester)
2    C26,C27                       22pF   (Ceramic disc)
15   C29,C30,C31,C32,C33,C34,C35,  330pF  (Ceramic disc)
     C36,C37,C38,C39,C40,C41,C42,
     C43

Integrated Circuits
-------------------
1    U1                            78L05          
1    U2                            MAX6225        
1    U3                            6N139          
1    U4                            PIC16F877  (Can also use PIC16F877A)
1    U5                            AD744J         
4    U6,U7,U8,U9                   MXL1014    (Can also use LT1014)
1    U10                           MAX306         
1    U11                           MAX544         
1    U12                           AD711J         

Transistors
-----------
3    Q1,Q2,Q3                      2N3904         

Diodes
------
2    D1,D2                         1N4148         

Miscellaneous
-------------
3    FB1,FB2,FB3                   Radial Ferrite Bead (Rapid 26-4865)
1    J1                            POWER      (4 pin 0.1" pitch Molex KK PCB header
                                               or cheaper equivalent like JYK P2500-xx/H2500-xx)
3    J2,J3,J4                                 (7 pin 0.1" pitch Molex KK PCB header)
1    J5                            MIDI In    (2 pin 0.1" pitch Molex KK PCB header)
1    J6                            MIDI Thru  (3 pin 0.1" pitch Molex KK PCB header)
1    J7                            Buttons    (5 pin 0.1" pitch Molex KK PCB header
                                               Farnell 176989 and 176444)
1    LCD1                          PC0802-A   (Connector is 14 pin 2mm pitch PCB header, or you
                                               can solder the wires directly.
                                               The LCD is a Powertip PC0802-A 8x2 alphanumeric
                                               display.  If you want a larger display, then get
                                               the PC0802-L.
                                               Available from RS Components 214-3288 & 214-3480
                                               The interface is quite standard, so probably
                                               another 8x2 alphanumeric display would also work
                                               - check the datasheet for the PC0802-A for the
                                               full specifications.)
2    RV1,RV2                       1K      (0.2" x 0.1" pitch multiturn precision trimmer
                                            e.g.
                                            Bourns 3260W 1/4" 11 turn wirewound 70ppm/C
                                            Bourns 3262W 1/4" 12 turn cermet 100ppm/C
                                            Bourns 3266W 1/4" 12 turn cermet 100ppm/C with PCB standoffs to allow washing
                                            Bourns 3296Y 3/8" 25 turn cermet 100ppm/C
                                            I used Bourns 3266W.  The 25 turn Bourns 3296Y
                                            will make adjusting easier and should fit the
                                            PCB - but the clearance between RV2 and U11 will
                                            be tight: looks to be just about ok from the
                                            measurements, but I didn't actually try it myself.)
1    RV3                           10K     (0.2" x 0.4" pitch standard cheap trimmer)
1    X1                            20MHz   (0.2" pitch low profile parallel cut crystal)

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