HardLabs

CM5 MINIMA

erikbeerepoot·bramble·schematics/hub-carrier-board/hub-carrier-board.kicad_pcb

CM5 MINIMA PCB layout, top view — open source Raspberry Pi board by erikbeerepoot

About the CM5 MINIMA PCB

CM5 MINIMA is an open source Raspberry Pi PCB design by erikbeerepoot, published on GitHub. It is a 4-layer board measuring 68 × 64.3 mm, with 49 components from 31 distinct parts.

Its main chip is the COMPUTEMODULE5-CM5, from the Raspberry Pi family. Other key parts include the SN74LVC1G14DBVR, AP22653W6, AP3441SHE-7B and ASEK-32.768KHZ-L-R-T. By type, the board carries 15 capacitors, 13 resistors, 9 connectors, 5 diodes, 4 ICs and 2 switches.

It belongs with the rf & radio, sensors and dev boards & breakouts designs in this gallery.

From the project

Bramble: Precision Agriculture Mesh

LoRa sensor and actuator network for farm monitoring, built on RP2040.

Hub-and-spoke architecture: a central hub manages the network while nodes collect sensor data (temperature, humidity) and control actuators (irrigation valves). LoRa provides long-range wireless with reliable delivery guarantees.

- Adafruit Feather RP2040 LoRa (SX1276, 915 MHz) - MT25QL01GBBB 128MB external flash for sensor data storage - STM32L010 PMU for power management and sleep

Main components on the CM5 MINIMA

SN74LVC1G14DBVRAP22653W6AP3441SHE-7BASEK-32.768KHZ-L-R-T

CM5 MINIMA bill of materials (BOM)

49 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SN74LVC1G14DBVR
U602
1
AP22653W6
U701
1
AP3441SHE-7B
U702
1
ASEK-32.768KHZ-L-R-T
U703
1
C160402
SM02B-SRSS-TB (LF)(SN)
CN1
1
GPIO1
J1
1
PWR
J2
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J5
1
COMPUTEMODULE5-CM5
ComputeModule5-CM5
J101
1
COMPUTEMODULE5-CM5
ComputeModule5-CM5
J102
1
I2C
J502
1
C265443
SPI
J503
1
BUS_M.2_SOCKET_M
Bus_M.2_Socket_M
J701
1
MK-11C04-G013
SW101
1
TS-1010A-B
SW501
2
RCLAMP0502BA
D502, D701
3
C2286
GREEN
D605, D606, D702
1
2.2UH
2.2uH
L701
1
470
C1
1
100NF
100nF
C2
Show 11 more
QtyPartRefs
1
4U7
4u7
C601
8
10U
10u
C701, C703, C704, C705, C708, C709, C710, C711
1
100UF
100uF
C702
2
100N
100n
C706, C712
1
4.7NF
4.7nF
C707
1
15K
15k
R3
2
5.1K
R20, R21
1
C17168
0R
R102
2
10K
10k
R104, R705
6
2K2
2k2
R501, R502, R605, R606, R706, R707
1
100K
100k
R704

CM5 MINIMA design files

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

CM5 MINIMA: common questions

What microcontroller does the CM5 MINIMA use?

The CM5 MINIMA is built around the COMPUTEMODULE5-CM5, from the Raspberry Pi family.

How big is the CM5 MINIMA PCB?

The CM5 MINIMA measures 68 × 64.3 mm, has 4 copper layers and is 2.1476 mm thick.

How many components are on the CM5 MINIMA?

49 components, from 31 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 CM5 MINIMA design files?

From the erikbeerepoot/bramble 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 CM5 MINIMA design in my own project?

The repository has no license, so all rights stay with erikbeerepoot. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the CM5 MINIMA 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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