HardLabs

CEM3340 VCO

JordanAceto·angelo_modular·pcb_docs/CEM3340_VCO/kicad_docs/CEM3340_VCO.kicad_pcb

CEM3340 VCO PCB layout, top view — open source STM32 board by JordanAceto
Simulate this board

About the CEM3340 VCO PCB

CEM3340 VCO 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 55.9 × 78.7 mm, with 92 components from 54 distinct parts.

Its main chip is the STM32F405RGT6, from the STM32 family. Other key parts include the AMS1117-3.3, REF02AU, CEM3340 and TL072. By type, the board carries 44 resistors, 25 capacitors, 7 ICs, 7 connectors, 2 test points and 1 transistor.

It belongs with the audio designs in this gallery.

From the project

modular analog synthesizer for a.p.

CEM3340 VCO, from the project README
From the project README

Main components on the CEM3340 VCO

AMS1117-3.3STM32F405RGT6REF02AUCEM3340TL072

CEM3340 VCO bill of materials (BOM)

92 components, 54 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AMS1117-3.3
L78L10_SOT89
U1
1
STM32F405RGT6
MC7905
U2
1
REF02AU
U3
1
CEM3340
U4
3
TL072
U5, U6, U7
1
MMDT3904
Q1
1
tuning controls
J1
1
1 v/oct inputs
J2
1
linear FM input
J3
1
sync input
J4
1
PWM inputs
J5
1
power input
J6
1
waveform outputs
j7
1
20k
RV1
1
5k
RV2
3
50k
RV3, RV5, RV6
1
500
RV4
2
TestPoint
TP1, TP2
3
10UF
100nF
C1, C4, C8
2
100NF
10uF
C2, C3
Show 34 more
QtyPartRefs
1
10NF
100nF
C5
4
100NF
100nF
C6, C7, C9, C12
3
100NF
1nF
C10, C13, C14
1
100NF
10nF
C11
1
2.2UF
10nF
C15
1
2.2UF
100nF
C16
2
12PF
100nF
C17, C18
5
100nF
C19, C21, C22, C23, C24
1
560pF
C20
1
10pF
C25
2
2K2
100k
R1, R3
1
10K
100k
R2
1
10K
1M
R4
1
100
100k
R5
1
110k
R6
6
100k
R7, R29, R31, R33, R37, R38
2
1M
R8, R11
2
5k6
R9, R10
2
51k
R12, R13
5
10k
R14, R18, R24, R27, R34
2
18k
R15, R26
1
82k
R16
2
470
R17, R20
1
680k
R19
1
1k62
R21
1
27k
R22
2
2k2
R23, R28
1
390
R25
1
34k
R30
1
68k
R32
2
15k
R35, R36
1
10M
R39
2
2k
R40, R44
3
1k
R41, R42, R43

CEM3340 VCO 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.

CEM3340 VCO: common questions

What microcontroller does the CEM3340 VCO use?

The CEM3340 VCO is built around the STM32F405RGT6, from the STM32 family.

How big is the CEM3340 VCO PCB?

The CEM3340 VCO measures 55.9 × 78.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CEM3340 VCO?

92 components, from 54 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 CEM3340 VCO 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 CEM3340 VCO 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 CEM3340 VCO 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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