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ResFFB

benregnier·resffb·KiCAD/ResFFB.kicad_pcb

ResFFB PCB layout, top view — open source board by benregnier
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About the ResFFB PCB

ResFFB is an open source PCB design by benregnier, published on GitHub. It is a 2-layer board measuring 40.1 × 108 mm, with 111 components from 53 distinct parts.

Other key parts include the TL074. By type, the board carries 57 resistors, 30 capacitors, 19 connectors and 4 ICs.

It belongs with the audio designs in this gallery.

From the project

4hp eurorack resonant filterbank based on Serge ResEQ

This is a compact fixed filter bank using the same frequencies as the lower 10 bands of the Serge Resonant EQ. It also features comb outs at the bottom, and a secondary input for feedback.

The kicad directory contains the schematic and PCB layout as a KiCad 6 project.

Please note this design does not include reverse polarity protection, and keyed headers don't fit within the width - please be careful to make sure that your power cable's polarity is correct!

ResFFB, from the project README
From the project README

Main components on the ResFFB

TL074

ResFFB bill of materials (BOM)

111 components, 53 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
TL074
U1, U2, U3, U4
1
IN 2
J1
1
IN 1
J2
1
COMB R
J3
1
COMB L
J4
1
5.2K
5.2k
J5
1
2.8K
2.8k
J6
1
1.5K
1.5k
J7
1
777
J8
1
411
J9
1
218
J10
1
115
J11
1
61
J12
1
CONN_02X05_ODD_EVEN
Conn_02x05_Odd_Even
J13
2
CONN_01X07_SOCKET
Conn_01x07_Socket
J14, J15
2
CONN_01X07_PIN
Conn_01x07_Pin
J16, J17
1
CONN_01X02_PIN
Conn_01x02_Pin
J18
1
CONN_01X02_SOCKET
Conn_01x02_Socket
J19
1
100K
100k
RV2
1
47PF
47pF
C1
Show 33 more
QtyPartRefs
2
22N
22n
C3, C4
2
10N
10n
C5, C6
4
4N7
4n7
C7, C8, C9, C10
3
2N2
2n2
C11, C12, C21
2
1n
C13, C14
2
680PF
680pF
C15, C16
2
220PF
220pF
C17, C18
2
4U7
4u7
C19, C20
8
0.1U
0.1u
C30, C31, C32, C33, C34, C35, C36, C37
2
EEEFN1C220R
22u
C44, C46
11
330R
R1, R2, R10, R11, R12, R13, R48, R49 +3
3
100K
R3, R4, R9
1
51K
51k
R5
1
680K
680k
R6
1
30K
30k
R7
16
47K
47k
R8, R17, R24, R25, R28, R32, R33, R44 +8
1
62K
62k
R14
2
36K
36k
R15, R20
1
820K
820k
R16
1
68K
68k
R18
2
43K
43k
R19, R26
2
22K
22k
R21, R43
1
910K
910k
R22
1
510K
510k
R23
1
24K
24k
R27
1
27K
27k
R29
1
560K
560k
R30
1
620K
620k
R31
2
82K
82k
R34, R38
2
16K5
16k5
R35, R41
1
33K
33k
R36
2
10K
10k
R37, R42
2
130K
130k
R39, R40

ResFFB design files

The KiCad project lives in the benregnier/resffb repository on GitHub; these links point at the commit this page was built from.

ResFFB: common questions

How big is the ResFFB PCB?

The ResFFB measures 40.1 × 108 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ResFFB?

111 components, from 53 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ResFFB design files?

From the benregnier/resffb repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the ResFFB design in my own project?

The repository has no license, so all rights stay with benregnier. Use it as a reference, and ask the author before reusing the design.

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