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SSI2140 LPF

JordanAceto·VCF_plug_in_boards·SSI2140_LPF_plug_in_board/kicad_6_docs/SSI2140_LPF_plug_in_board.kicad_pcb

SSI2140 LPF PCB layout, top view — open source board by JordanAceto
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About the SSI2140 LPF PCB

SSI2140 LPF is an open source PCB design by JordanAceto, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 58.4 × 50.8 mm, with 55 components from 36 distinct parts.

Other key parts include the LM13700 and TL072. By type, the board carries 29 resistors, 13 capacitors, 4 connectors, 3 ICs and 3 diodes.

It belongs with the audio designs in this gallery.

From the project

Various small synthesizer Voltage Controlled Filter pcbs

Small SSI2140 based low pass filter PCB, designed to plug into a larger motherboard.

Basic datasheet implementation of the SSI2140 lowpass filter with "Output Gain" Q Compensation.

-Audio in: dry audio input to be filtered.

-Frequency CV in: 0 volts to +2.048 volts, higher voltage = higher sweep.

-Feedback CV in: 0 volts to +2.048 volts, higher voltage = more feedback.

SSI2140 LPF, from the project README
From the project README

Main components on the SSI2140 LPF

LM13700TL072

SSI2140 LPF bill of materials (BOM)

55 components, 36 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM13700
SSI2140
U1
2
TL072
U2, U3
1
signal_input
J1
1
signal_output
J2
1
cutoff_CV_input
J3
1
feedback_CV_and_PS
J4
3
10k
RV1, RV2, RV3
1
1N4148W
3z3
D1
2
1N4148W
D2, D3
2
220p
C1, C2
1
470N
220p
C3
1
100P
220p
C4
1
100p
C5
2
10u
C6, C7
1
4N7
100n
C8
2
10U
100n
C9, C10
3
100N
100n
C11, C12, C13
4
10K
10k
R1, R3, R6, R7
1
220
200
R2
3
220
10k
R4, R9, R12
Show 16 more
QtyPartRefs
3
10K
200
R5, R8, R11
2
1K8
10k
R10, R26
1
10K
8k2
R13
1
10K
1k
R14
1
150K
10k
R15
2
15K
10k
R16, R19
2
4K7
10k
R17, R23
1
270
10k
R18
1
270K
10k
R20
1
270
6k8
R21
1
51K
56k
R22
1
10K
33k
R24
1
150K
200k
R25
1
470K
200k
R27
1
4K7
1k
R28
1
10k
R29

SSI2140 LPF design files

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

SSI2140 LPF: common questions

How big is the SSI2140 LPF PCB?

The SSI2140 LPF measures 58.4 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SSI2140 LPF?

55 components, from 36 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 SSI2140 LPF design files?

From the JordanAceto/VCF_plug_in_boards 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 SSI2140 LPF design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which JordanAceto chose for the repository.

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