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Frank core2 proto

rh1tech·frank-lab·frank_core2_proto/frank_core2_proto.kicad_pcb

Frank core2 proto PCB layout, top view — open source RP2040/RP2350 board by rh1tech

About the Frank core2 proto PCB

Frank core2 proto is an open source RP2040/RP2350 PCB design by rh1tech, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 55 × 55 mm, with 129 components from 43 distinct parts.

Its main chip is the RP2350B, from the RP2040/RP2350 family. Other key parts include the W25Q128JVPIQ, ESP-PSRAM64H, RP2350, LM358 and TDA1387T. By type, the board carries 53 capacitors, 40 resistors, 11 ICs, 9 connectors, 4 switches and 4 inductors.

From the project

FRANK Board Laboratory (work-in-progress board prototopyes)

Official page: frank.rh1.tech — hub for all FRANK boards and firmware.

Experimental and work-in-progress boards for the FRANK hardware emulation platform.

WARNING: These boards are untested and unreleased. Do NOT order PCBs from this repository. They may contain errors, incomplete routing, or unverified component footprints. Use at your own risk.

For production-ready boards, see the main frank repository.

Main components on the Frank core2 proto

W25Q128JVPIQESP-PSRAM64HRP2350BRP2350LM358TDA1387TUSBLC6-2SC6AMS1117-3.3

Frank core2 proto bill of materials (BOM)

129 components, 43 distinct parts.

QtyPartRefs
2
W25Q128JVPIQ
U1, U4
2
ESP-PSRAM64H
U2, U5
1
RP2350B
U3
1
RP2350
U6
1
LM358
U7
1
TDA1387T
U8
2
USBLC6-2SC6
U9, U11
1
AMS1117-3.3
U10
1
ASE-12MHz
Y1
1
ASE-12MHz
Y2
2
Debug
J1, J3
2
UART
J2, J4
1
DC3RX19JA2
J5
1
PJ-320D
J6
1
104031-0811
J7
2
USB4215-03-A
J8, J9
2
KMR221G LFS
RP Boot
S1, S3
2
KMR221G LFS
RP Reset
S2, S4
1
WS2812B-2020
LD1
1
Blue
LD2
Show 23 more
QtyPartRefs
1
Green
LD3
2
1N5819WS
D1, D2
1
SS34
D3
1
3.3u
L1
1
3.3u
L2
2
330R
L3, L4
35
100n
C1, C2, C3, C6, C9, C10, C11, C12 +27
8
4.7u
C4, C5, C7, C8, C23, C24, C26, C27
7
10u
C37, C38, C39, C41, C42, C44, C46
1
10u
C40
2
22u
C49, C51
4
33R
R1, R2, R6, R15
11
10K
R3, R4, R5, R12, R13, R20, R21, R22 +3
4
1K
R7, R16, R19, R36
2
0R
R8, R14
4
27R
R9, R10, R17, R18
1
330R
R11
2
47K
R26, R27
2
20K
R28, R29
2
100R
R30, R31
2
470R
R32, R33
4
5.1K
R34, R35, R37, R38
2
270R
RN1, RN2

Frank core2 proto design files

The KiCad project lives in the rh1tech/frank-lab repository on GitHub; these links point at the commit this page was built from.

Frank core2 proto: common questions

What microcontroller does the Frank core2 proto use?

The Frank core2 proto is built around the RP2350B, from the RP2040/RP2350 family.

How big is the Frank core2 proto PCB?

The Frank core2 proto measures 55 × 55 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Frank core2 proto?

129 components, from 43 distinct parts. The full bill of materials is listed on this page.

Where can I download the Frank core2 proto design files?

From the rh1tech/frank-lab repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Frank core2 proto design in my own project?

Yes, under the terms of its GPL-3.0 license, which rh1tech chose for the repository.

Can I test firmware for the Frank core2 proto 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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