HardLabs

Faux pi zero

DLehenbauer·faux-pi-zero·hw/faux-pi-0.kicad_pcb

Faux pi zero PCB layout, top view — open source RP2040/RP2350 board by DLehenbauer

About the Faux pi zero PCB

Faux pi zero is an open source RP2040/RP2350 PCB design by DLehenbauer, published on GitHub. It is a 4-layer board measuring 65 × 30 mm, with 59 components from 31 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the AMS1117-3.3 and W25Q128JVS. By type, the board carries 22 resistors, 17 capacitors, 7 connectors, 5 jumpers, 3 ICs and 2 switches.

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

From the project

RP2040 dev board in a Raspberry Pi Zero compatible form factor. Includes DVI and SD Card.

Open hardware RP2040 dev board in a Raspberry Pi Zero compatible form factor. Includes Mini HDMI (via bitbanged DVI) and microSD.

This board aids with migrating a project from the Pi Zero to the RP2040 while retaining the option of moving back to the Pi Zero in the future. It has the same footprint as the Pi Zero and a partially compatible pinout, making it convenient to support both the RP2040 and Pi Zero in the same design.

Faux pi zero, from the project README
From the project README

Main components on the Faux pi zero

RP2040AMS1117-3.3W25Q128JVS

Faux pi zero bill of materials (BOM)

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

QtyPartRefs
1
RP2040
U1
1
AMS1117-3.3
U2
1
W25Q128JVS
U3
1
C9002
12 MHz
Y1
1
C77238
PWR_IN
J1
1
DEBUG
J2
1
RUN
J3
1
HDMI_C_1.4
J6
1
GPIO
J8
1
C585350
Micro_SD_Card_Det
J9
1
C77238
USB
J10
1
SPI0_PICO
JP1
1
SPI0_POCI
JP2
1
SPI0_POCI
DVI_CEC
JP3
1
DVI_SCL
JP4
1
DVI_SDA
JP5
1
RESET
SW1
1
BOOTSEL
SW2
1
C2286
SD_RED
D1
1
C72043
STS_GRN
D2
Show 11 more
QtyPartRefs
2
30P
30p
C1, C2
2
22U
22u
C4, C5
10
100N
100n
C7, C8, C9, C10, C11, C12, C15, C16 +2
2
2.2U
2.2u
C13, C19
1
10U
10u
C14
4
10K
10k
R1, R2, R10, R19
2
27
R3, R4
2
1k
R5, R20
10
270
R6, R7, R8, R9, R11, R12, R13, R14 +2
1
470
R17
3
2K2
2k2
R18, R21, R22

Faux pi zero design files

The KiCad project lives in the DLehenbauer/faux-pi-zero repository on GitHub; these links point at the commit this page was built from.

Faux pi zero: common questions

What microcontroller does the Faux pi zero use?

The Faux pi zero is built around the RP2040, from the RP2040/RP2350 family.

How big is the Faux pi zero PCB?

The Faux pi zero measures 65 × 30 mm, has 4 copper layers and is 1.6458 mm thick.

How many components are on the Faux pi zero?

59 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 Faux pi zero design files?

From the DLehenbauer/faux-pi-zero 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 Faux pi zero design in my own project?

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

Can I test firmware for the Faux pi zero 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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