HardLabs

Loongcat40

ChrisChrisLoLo·loongcat40·pcb/loongcat40/loongcat40.kicad_pcb

Loongcat40 PCB layout, top view — open source RP2040/RP2350 board by ChrisChrisLoLo
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About the Loongcat40 PCB

Loongcat40 is an open source RP2040/RP2350 PCB design by ChrisChrisLoLo, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 219.1 × 76.2 mm, with 86 components from 6 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 42 switches, 40 diodes, 2 ICs, 1 module and 1 jumper.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

loongcat is loooooong

Get PCBs here if you're in the EU!: https://keycapsss.com/Loongcat40-PCB/KC10265

Thank you to NextPCB and all of my Github Sponsors for sponsoring and supporting this project!

Big thank you to @suhga for the fantastic artwork used and displayed on this keyboard! Please check her out at https://twitter.com/suhga!

Loongcat40, from the project README
From the project README

Main components on the Loongcat40

RaspberryPi_Pico

Loongcat40 bill of materials (BOM)

86 components, 6 distinct parts.

QtyPartRefs
1
~
U1
1
~
U2
1
RaspberryPi_Pico
A2
1
Jumper_2_Small_Open
JP1
42
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +34
40
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +32

Loongcat40 design files

The KiCad project lives in the ChrisChrisLoLo/loongcat40 repository on GitHub; these links point at the commit this page was built from.

Loongcat40: common questions

What microcontroller does the Loongcat40 use?

The Loongcat40 is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Loongcat40 PCB?

The Loongcat40 measures 219.1 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Loongcat40?

86 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the Loongcat40 design files?

From the ChrisChrisLoLo/loongcat40 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Loongcat40 design in my own project?

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

Can I test firmware for the Loongcat40 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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