HardLabs

Zerofrank

rh1tech·frank·hardware/zerofrank/zerofrank.kicad_pcb

Zerofrank PCB layout, top view — open source RP2040/RP2350 board by rh1tech

About the Zerofrank PCB

Zerofrank 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 65 × 25 mm, with 89 components from 38 distinct parts.

Its main chip is the RP2350, from the RP2040/RP2350 family. Other key parts include the AMS1117-3.3, USBLC6-2SC6, ESP-PSRAM64H, W25Q128JVS and TDA1387T. By type, the board carries 34 resistors, 33 capacitors, 7 ICs, 7 connectors, 2 switches and 2 LEDs.

It belongs with the retro computing designs in this gallery.

From the project

RP2350 Based Hardware Emulation Platform

FRANK is a hardware emulation platform built around the Raspberry Pi RP2350 (Pico 2 modules and RP2350A QFN). RP2040 / Pico still works in FRANK's socket, but in practice only a handful of firmware (mainly the older ZX Spectrum cores) still targets RP2040. Everything modern (IBM PC, NES, SNES, Genesis, the DOOM / id Tech 1 ports, FRANK OS, and so on) is RP2350-only.

Zerofrank, from the project README
From the project README

Main components on the Zerofrank

AMS1117-3.3USBLC6-2SC6ESP-PSRAM64HW25Q128JVSRP2350TDA1387TLM358

Zerofrank bill of materials (BOM)

89 components, 38 distinct parts.

QtyPartRefs
1
AMS1117-3.3
U1
1
USBLC6-2SC6
U2
1
ESP-PSRAM64H
U3
1
W25Q128JVS
U4
1
RP2350
U5
1
TDA1387T
U6
1
LM358
U7
1
ASE-12MHz
Y1
1
UART
J1
1
DEBUG
J2
2
USB4215-03-A
J3, J4
1
DC3RX19JA2
J5
1
PJ-320D
J6
1
47571-0001
0475710001
J7
2
KMR221G LFS
RP Reset
S1, S2
1
Green
LD1
1
Blue
LD2
1
1N5819WS
D1
1
330R
L1
1
3.3u
L2
Show 18 more
QtyPartRefs
2
22u
C1, C3
19
100n
C2, C4, C5, C6, C7, C8, C11, C14 +11
4
4.7u
C9, C10, C12, C13
7
10u
C23, C25, C26, C27, C28, C30, C31
1
10u
C29
1
1.5K
R1
4
5.1K
R2, R3, R7, R8
3
1K
R4, R15, R16
4
22R
R5, R6, R9, R10
1
0R
R11
8
10K
R12, R13, R22, R23, R24, R25, R26, R27
1
33R
R14
2
27R
R17, R18
2
100R
R19, R32
2
470R
R20, R21
2
47K
R28, R29
2
20K
R30, R31
2
270R
RN1, RN2

Zerofrank design files

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

Zerofrank: common questions

What microcontroller does the Zerofrank use?

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

How big is the Zerofrank PCB?

The Zerofrank measures 65 × 25 mm, has 4 copper layers and is 1 mm thick.

How many components are on the Zerofrank?

89 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the Zerofrank design files?

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

Can I use the Zerofrank 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 Zerofrank 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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