HardLabs

Cheep4

emeb·Cheep4·Hardware/cheep4/cheep4.kicad_pcb

Cheep4 PCB layout, top view — open source STM32 board by emeb

About the Cheep4 PCB

Cheep4 is an open source STM32 PCB design by emeb, published on GitHub under the MIT license. It is a 4-layer board measuring 38.1 × 100 mm, with 115 components from 45 distinct parts.

Its main chip is the STM32C542CC, from the STM32 family. Other key parts include the MCP6004-I/ST, LM1117-5.0, XC6222B331MR-G, LM4040C50FTA and PCM5100A. By type, the board carries 40 capacitors, 36 resistors, 12 connectors, 8 ICs, 3 switches and 3 inductors.

It belongs with the audio designs in this gallery.

From the project

Yet another Eurorack digital oscillator

This directory contains the KiCAD design files for the Cheep4 module, including both the passive front panel and the electrical rear panel.

Main components on the Cheep4

MCP6004-I/STLM1117-5.0STM32C542CCXC6222B331MR-GLM4040C50FTAPCM5100ATL072CDTAPS6404L-3SQR-SN

Cheep4 bill of materials (BOM)

115 components, 45 distinct parts.

QtyPartRefs
1
MCP6004-I/ST
U1
1
LM1117-5.0
U2
1
STM32C542CC
U3
1
XC6222B331MR-G
U4
1
LM4040C50FTA
U5
1
PCM5100A
U6
1
TL072CDT
U7
1
APS6404L-3SQR-SN
U8
1
~
A1
1
MMBT3904
Q1
1
SX32Y024000BK1T
Y1
1
Conn_02x08_Odd_Even
J1
8
AudioJack2_SwitchT
J2, J3, J4, J7, J8, J9, J10, J11
1
STDC14
J5
1
JST SH-4 (Qwiic)
J6
1
USB_C_Receptacle_USB2.0
J12
6
10k
RV1, RV2, RV3, RV4, RV6, RV7
1
1k
RV5
2
SW_Push
SW1, SW2
1
SW_Push
SW3
Show 25 more
QtyPartRefs
1
LTST-C19HE1WT
LED1
2
SS14
D1, D2
2
GZ2012D601TF
FB1, FB2
1
GZ1608D222TF
FB3
2
27pf
C1, C2
4
330pf
C3, C4, C18, C20
3
1uf
C5, C6, C14
18
0.1uf
C7, C8, C9, C10, C11, C12, C17, C19 +10
8
10uf
C13, C15, C21, C24, C27, C28, C31, C37
3
2.2uf
C16, C32, C33
2
68pf
C41, C42
8
100k
R1, R3, R5, R12, R14, R21, R32, R33
1
1.2M
R2
4
49.9k
R4, R6, R13, R15
1
32.4k
R7
3
33k
R8, R16, R17
4
180
R9, R10, R18, R19
1
10k
R11
3
1k
R20, R23, R24
1
1.8k
R22
1
10k
R25
4
5k1
R26, R27, R36, R37
2
62k
R28, R29
2
100
R34, R35
1
1M
R38

Cheep4 design files

The KiCad project lives in the emeb/Cheep4 repository on GitHub; these links point at the commit this page was built from.

Cheep4: common questions

What microcontroller does the Cheep4 use?

The Cheep4 is built around the STM32C542CC, from the STM32 family.

How big is the Cheep4 PCB?

The Cheep4 measures 38.1 × 100 mm, has 4 copper layers and is 1.5313 mm thick.

How many components are on the Cheep4?

115 components, from 45 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cheep4 design files?

From the emeb/Cheep4 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Cheep4 design in my own project?

Yes, under the terms of its MIT license, which emeb chose for the repository.

Can I test firmware for the Cheep4 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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