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Chocolate croissant2

namnlos-io·chocolate_croissant

Chocolate croissant2 PCB layout, top view — open source RP2040/RP2350 board by namnlos-io

About the Chocolate croissant2 PCB

Chocolate croissant2 is an open source RP2040/RP2350 PCB design by namnlos-io, published on GitHub under the MIT license. It is a 2-layer board measuring 85 × 56 mm, with 9 components from 7 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family.

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

From the project

It's a Raspberry Pi Pico on a Raspberry Pi B+

This is a breakout board for when you want to fit a Raspberry Pi [34] B hat onto a Raspberry Pi Pico or fit a Raspberry Pi Pico in something that expects a full Raspberry Pi [34] B+.

The Raspberry Pi Pico W fits too of course.

The pinout might not be what you expect since the idea is to map function to function rather than GPIO pin to pin.

By this I mean that the Pico I2C0 pins are mapped to the I2C pins of the Raspberry Pi B+, SPI0 on the Pico is mapped to the SPI of the Raspberry Pi B+ and so on.

Chocolate croissant2, from the project README
From the project README

Main components on the Chocolate croissant2

Pico

Chocolate croissant2 bill of materials (BOM)

9 components, 7 distinct parts.

QtyPartRefs
1
Pico
U1
2
QWIIC_CONNECTORJS-1MM
DEBUG1, I2C0QT1
1
Conn_01x04
I2C0
2
SolderJumper_3_Open
PI_5V_SEL1, SPI_VCC_SEL1
1
Raspberry Pi 2 or 3
Raspberry_Pi_2_3
RP1
1
Conn_01x06
SPI0_6
1
Conn_01x08
SPI0_8

Chocolate croissant2 design files

The KiCad project lives in the namnlos-io/chocolate_croissant repository on GitHub; these links point at the commit this page was built from.

Chocolate croissant2: common questions

What microcontroller does the Chocolate croissant2 use?

The Chocolate croissant2 is built around the Pico, from the RP2040/RP2350 family.

How big is the Chocolate croissant2 PCB?

The Chocolate croissant2 measures 85 × 56 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Chocolate croissant2?

9 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Chocolate croissant2 design files?

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

Can I use the Chocolate croissant2 design in my own project?

Yes, under the terms of its MIT license, which namnlos-io chose for the repository.

Can I test firmware for the Chocolate croissant2 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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