HardLabs

Berryboard

curtisgalloway·berryboard

Berryboard PCB layout, top view — open source RP2040/RP2350 board by curtisgalloway

About the Berryboard PCB

Berryboard is an open source RP2040/RP2350 PCB design by curtisgalloway, published on GitHub. It is a 2-layer board measuring 56 × 65 mm, with 58 components from 41 distinct parts.

Its main chip is the RP2350B, from the RP2040/RP2350 family. Other key parts include the TPS2121, AP2112K-3.3, ICM-42688-P, MMC5983MA and 24LC32. By type, the board carries 16 connectors, 15 capacitors, 12 resistors, 7 ICs, 2 diodes and 1 crystal.

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

From the project

Custom ROV control HAT for Raspberry Pi 4/5 with RP2350B MCU

A Raspberry Pi HAT+ for ROV (remotely operated vehicle) control, with an RP2350B co-processor for hard real-time servo and sensor management.

Berryboard sits on top of a Raspberry Pi 4 or 5 and handles the latency-sensitive workload that the Linux kernel can't guarantee: PWM servo output, sensor polling, and leak detection. The RPi handles high-level control logic over UART; the RP2350B handles everything that needs deterministic timing.

Main components on the Berryboard

TPS2121AP2112K-3.3ICM-42688-PMMC5983MA24LC32RP2350BW25Q16JVSS

Berryboard bill of materials (BOM)

58 components, 41 distinct parts.

QtyPartRefs
1
TPS2121
U1
1
AP2112K-3.3
U2
1
ICM-42688-P
U3
1
MMC5983MA
U4
1
24LC32
U5
1
RP2350B
U6
1
W25Q16JVSS
U7
1
ABM8-272-T3
Y1
1
XT30_SERVO_PWR
J1
1
RPi_GPIO_40P
J2
1
USB_C_RP2350
J3
1
SERVO_SIG
J4
1
SERVO_PWR
J5
1
SERVO_GND
J6
1
QWIIC_RPI_1
J12
1
QWIIC_RPI_2
J13
1
QWIIC_RPI_3
J14
1
QWIIC_MCU_1
J15
1
QWIIC_MCU_2
J16
1
QWIIC_MCU_3
J17
Show 21 more
QtyPartRefs
1
LEAK_1
J18
1
LEAK_2
J19
1
HAT_5V_IN
J20
1
SWD
J21
4
MountingHole_2.75mm
MH1, MH2, MH3, MH4
1
WS2812B
D1
1
SMBJ7.5A
D2
1
AOTA-B201610S3R3-101-T
L1
6
100nF
C1, C5, C6, C7, C8, C9
3
4.7uF
C2, C4, C15
2
10uF
C3, C10
1
47uF
C11
1
100uF
C12
2
15pF
C13, C14
2
5.1k
R1, R2
4
4.7k
R3, R4, R5, R6
1
220k
R7
1
100k
R8
2
27
R9, R10
1
1k
R11
1
33
R12

Berryboard design files

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

Berryboard: common questions

What microcontroller does the Berryboard use?

The Berryboard is built around the RP2350B, from the RP2040/RP2350 family.

How big is the Berryboard PCB?

The Berryboard measures 56 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Berryboard?

58 components, from 41 distinct parts. The full bill of materials is listed on this page.

Where can I download the Berryboard design files?

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

Can I use the Berryboard design in my own project?

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

Can I test firmware for the Berryboard without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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