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CEM3320 LPF plug in board

JordanAceto·angelo_modular·pcb_docs/CEM3320_LPF_plug_in_board/kicad_docs/CEM3320_LPF_plug_in_board.kicad_pcb

CEM3320 LPF plug in board layout, top view — open source STM32 board by JordanAceto
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About the CEM3320 LPF plug in board

CEM3320 LPF plug in board is an open source STM32 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 42 components from 26 distinct parts.

Its main chip is the STM32F405RGT6, from the STM32 family. Other key parts include the AMS1117-3.3. By type, the board carries 21 resistors, 12 capacitors, 4 connectors and 2 ICs.

It belongs with the audio designs in this gallery.

From the project

modular analog synthesizer for a.p.

Small CEM3320 based low pass filter PCB, designed to plug into a larger motherboard.

CEM3320 based LPF with Q compensation. This PCB includes the audio path and CV inputs for frequency and feedback, but does not include any modulation sources.

The intended use for this board is to plug in to a larger motherboard which contains slots for one or more of these plug-in boards, as well as modulation sources, panel controls, and input/output routing.

CEM3320 LPF plug in board, from the project README
From the project README

Main components on the CEM3320 LPF plug in board

AMS1117-3.3STM32F405RGT6

CEM3320 LPF plug in board bill of materials (BOM)

42 components, 26 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AMS1117-3.3
CEM3320
U1
1
STM32F405RGT6
TL072
U2
1
signal_in
J1
1
cutoff_CV_in
J2
1
signal_out
J3
1
feedback_CV_in_and_PS
J4
1
10k
RV1
2
100k
RV2, RV3
2
10UF
220pF
C1, C4
2
100NF
220pF
C2, C3
1
10NF
470nF
C5
1
100NF
100pF
C6
1
100NF
470nF
C7
1
10UF
100pF
C8
4
100NF
100nF
C9, C10, C11, C12
1
2K2
91k
R1
2
10K
100k
R2, R4
1
2K2
330k
R3
1
100
10k
R5
3
91k
R6, R10, R15
Show 6 more
QtyPartRefs
1
1k2
R7
3
180k
R8, R11, R16
6
100k
R9, R12, R17, R18, R19, R21
1
18k
R13
1
51k
R14
1
150k
R20

CEM3320 LPF plug in board design files

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

CEM3320 LPF plug in board: common questions

What microcontroller does the CEM3320 LPF plug in board use?

The CEM3320 LPF plug in board is built around the STM32F405RGT6, from the STM32 family.

How big is the CEM3320 LPF plug in board?

The CEM3320 LPF plug in board measures 58.4 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CEM3320 LPF plug in board?

42 components, from 26 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 CEM3320 LPF plug in board design files?

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

Can I use the CEM3320 LPF plug in board design in my own project?

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

Can I test firmware for the CEM3320 LPF plug in board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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