HardLabs

RP2350

engelberd·sensor-system·hardware/Node rev.3.5/RP2350.kicad_pcb

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

About the RP2350 PCB

RP2350 is an open source RP2040/RP2350 PCB design by engelberd, published on GitHub. It is a 4-layer board measuring 51.4 × 31.4 mm, with 85 components from 54 distinct parts.

Its main chip is the OKI-78SR-5_1_5-W36-C, from the RP2040/RP2350 family. Other key parts include the LP2950CZ-3.3/NOPB, ADXL355BEZ-RL7, TPS2121RUXR, USBLC6-2SC6 and TLV75733PDBVR. By type, the board carries 30 capacitors, 20 resistors, 8 ICs, 7 diodes, 3 inductors and 1 connector.

It belongs with the sensors designs in this gallery.

From the project

Working notes for the first custom RP2350A board with ADXL355, USB-C development power/data, 12 V field input, RS485, and a power architecture biased toward a clean accelerometer supply.

Working notes for the first custom RP2350A board with ADXL355, USB-C development power/data, 12 V field input, RS485, and a power architecture biased toward a clean accelerometer supply.

- Keep firmware changes small by staying close to Raspberry Pi Pico 2/RP2350A. - Give ADXL355 the quietest practical supply and layout environment. - Allow development from USB-C without a 12 V supply. - Allow normal field operation from 12 V. - Prevent backfeeding between USB VBUS and the 12 V/buck input. - Keep the schematic easy to manufacture externally, even if components are small.

Main components on the RP2350

OKI-78SR-5_1_5-W36-CLP2950CZ-3.3/NOPBADXL355BEZ-RL7TPS2121RUXRUSBLC6-2SC6TLV75733PDBVRW25Q128JVSTPS7A2033PDBVR

RP2350 bill of materials (BOM)

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

QtyPartRefs
1
OKI-78SR-5_1_5-W36-C
RP2350A
U1
1
LP2950CZ-3.3/NOPB
THVD1450DR
Texas Instruments
U2
1
ADXL355BEZ-RL7
U3
1
TPS2121RUXR
U4
1
USBLC6-2SC6
U5
1
TLV75733PDBVR
U6
1
W25Q128JVS
Winbond(华邦)
U7
1
TPS7A2033PDBVR
U8
1
USB_C_Receptacle_USB2.0_14P
G-Switch(品赞)
J3
2
100nF
C_IN1, C_IN2
2
22uF
C_OUT1, C_USB_BULK1
1
10nF
C_SHIELD1
1
MF-R050
Polyfuse_Small
F1
1
Jumper_2_Open
JP1
2
JST-GH-5
J_IN1, J_OUT1
2
100k
R_ILM1, R_PR1_BOT1
1
324k
R_PR1_TOP1
1
1M
R_SHIELD1
1
0R DNP
R_SHIELD_0R1
1
BOOTSEL
SW1
Show 34 more
QtyPartRefs
1
TPS62175DQCR
U_BUCK1
1
P6KE15A-DIO
SS14
D1
1
SMBJ14A
D2
3
LED_RED
D3, D5, D7
1
SM712_SOT23
D4
1
LED_GREEN
D6
1
FerriteBead_S
FB1
1
10uH
cjiang(长江微电)
L2
1
3.3uH
ABRACON
L3
1
10UF
10uF
C4
1
470UF
100nF
C5
1
100NF
2.2uF
C6
2
22uF
C7, C18
1
1nF/2kV
C11
11
100nF
C13, C19, C20, C21, C22, C24, C25, C30 +3
1
10nF
C14
4
2.2uF
C15, C16, C31, C32
2
100nF
C17, C28
1
10uF
C23
1
4.7uF
C26
1
4.7uF
C27
1
1uF
C29
1
10uF
C33
1
1uF
C36
2
5.1k
R2, R3
1
523k
R4
5
100k
R5, R6, R7, R23, R24
2
27ohm
R9, R10
1
1M
R12
2
10k
R14, R27
1
33ohm
R17
4
2.2k
R20, R25, R26, R28
1
120ohm
R21
1
100k
R22

RP2350 design files

The KiCad project lives in the engelberd/sensor-system repository on GitHub; these links point at the commit this page was built from.

RP2350: common questions

What microcontroller does the RP2350 use?

The RP2350 is built around the OKI-78SR-5_1_5-W36-C, from the RP2040/RP2350 family.

How big is the RP2350 PCB?

The RP2350 measures 51.4 × 31.4 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the RP2350?

85 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 RP2350 design files?

From the engelberd/sensor-system 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 RP2350 design in my own project?

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

Can I test firmware for the RP2350 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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