HardLabs

CompactPi

loganrf·compactPi·Design Files/compactPi.kicad_pcb

CompactPi PCB layout, top view — open source Raspberry Pi board by loganrf

About the CompactPi PCB

CompactPi is an open source Raspberry Pi PCB design by loganrf, published on GitHub under the CERN-OHL-S-2.0 license. It is a 6-layer board measuring 47 × 105 mm, with 147 components from 54 distinct parts.

Its main chip is the ComputeModule5-CM5, from the Raspberry Pi family. Other key parts include the RT9742GGJ5, AT24CS64-MAHM, LM74700QDBVRQ1, CSD18511Q5A and BMI270. By type, the board carries 68 capacitors, 28 resistors, 24 ICs, 19 connectors, 4 diodes and 1 crystal.

It belongs with the sensors designs in this gallery.

From the project

compactPi is a project to develop a compact Raspberry Pi Compute Module carrier suitable for ArduPilot applications. It's primarily targeted at marine applications (ArduSub/ArduRover).

compactPi is a project to develop a compact Raspberry Pi Compute Module carrier suitable for ArduPilot applications. It's primarily targeted at marine applications (ArduSub/ArduRover).

As of June 2026, these milestones are way out of date due to personal circumstances. As I get back up to speed there will be substantial updates to this timeline!

CompactPi, from the project README
From the project README

Main components on the CompactPi

RT9742GGJ5AT24CS64-MAHMLM74700QDBVRQ1CSD18511Q5ABMI27074LVC2T45DCTLVM13630RDHRAK09918CRT9742SNGVPCA9685PWMMC5983MAMCP25625x-x-MLWE-TVS-82400102TCA9517ADGKBMP390

CompactPi bill of materials (BOM)

147 components, 54 distinct parts.

QtyPartRefs
1
RT9742GGJ5
U1
1
AT24CS64-MAHM
U2
1
~
U3
3
LM74700QDBVRQ1
U4, U7, U9
3
CSD18511Q5A
U5, U6, U8
1
BMI270
U10
3
74LVC2T45DC
U11, U12, U16
2
TLVM13630RDHR
U13, U14
1
AK09918C
U15
1
RT9742SNGV
U17
1
PCA9685PW
U18
1
MMC5983MA
U20
1
MCP25625x-x-ML
U21
2
WE-TVS-82400102
U22, U23
1
TCA9517ADGK
U24
1
BMP390
U25
1
Crystal_GND24_Small
Y1
1
1053101208
J1
1
HDMI_A_1.4
J2
7
Conn_01x04_MountingPin
J3, J5, J6, J7, J8, J9, J11
Show 34 more
QtyPartRefs
2
Conn_01x06_MountingPin
J4, J10
2
Conn_01x02_MountingPin
J12, J13
1
Micro_SD_Card_Det
J14
1
USB_C_Receptacle_USB2.0
J15
4
Conn_01x06_MountingPin
J16, J17, J18, J19
1
Choke_CommonMode_FerriteCore_1234
FL1
1
ComputeModule5-CM5
Module1
1
TG110-E050N5xx
TR1
2
SMAJ26A
D1, D2
1
LED Red
D4
1
SZNUP2105L
D5
12
6.8uF
C1, C2, C42, C43, C44, C45, C46, C47 +4
1
10u
C3
5
47uF
C4, C11, C14, C20, C22
9
4.7uF
C5, C12, C15, C17, C18, C28, C30, C31 +1
14
100nF
C6, C7, C8, C9, C10, C13, C16, C19 +6
2
1uF
C29, C32
16
100nF
C34, C35, C36, C37, C38, C39, C54, C55 +8
2
100n
C40, C41
2
22pF
C52, C53
1
1000pF
C56
1
10uF
C63
2
10u
C66, C67
1
47pF
C68
2
R_US
R1, R2
1
10K 1%
R4
3
2.2K 1%
R5, R6, R12
2
25.5k
R7, R9
10
10k
R8, R11, R14, R15, R16, R17, R22, R23 +2
2
53.6k
R10, R13
1
1k
R19
2
75
R20, R21
1
120
R25
4
R_Pack04
RN1, RN2, RN3, RN4

CompactPi design files

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

CompactPi: common questions

What microcontroller does the CompactPi use?

The CompactPi is built around the ComputeModule5-CM5, from the Raspberry Pi family.

How big is the CompactPi PCB?

The CompactPi measures 47 × 105 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the CompactPi?

147 components, from 54 distinct parts. The full bill of materials is listed on this page.

Where can I download the CompactPi design files?

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

Can I use the CompactPi design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which loganrf chose for the repository.

Can I test firmware for the CompactPi without the hardware?

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

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