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Jamboard rounded

jamdotjar·jam56s·pcb/jamboard-rounded.kicad_pcb

Jamboard rounded PCB layout, top view — open source RP2040/RP2350 board by jamdotjar
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About the Jamboard rounded PCB

Jamboard rounded is an open source RP2040/RP2350 PCB design by jamdotjar, published on GitHub. It is a 2-layer board measuring 140.5 × 117 mm, with 86 components from 7 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the TRRS. By type, the board carries 56 diodes, 28 switches and 2 ICs.

It belongs with the keyboards designs in this gallery.

From the project

A fully custom 56-key column-staggered hotswap split keyboard

I'll replace this with a proper photo once it's built, but for now heres a quick render

This is my first custom keyboard design, and my second hardware project. It was designed with a few goals in mind: 1. to be functional ( not broken, hard to break ) 2. to be mine ( my own design, for my use case ) 3. to be simple ( simple to use, simple to build ) 4. to be something I'll actually use.

Jamboard rounded, from the project README
From the project README

Main components on the Jamboard rounded

PicoTRRS

Jamboard rounded bill of materials (BOM)

86 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Pico
U1
1
TRRS
U2
16
SW_PUSH_45DEG
SW_Push_45deg
S1, S2, S3, S4, S9, S10, S11, S12 +8
12
SW_Push_45deg
S5, S6, S7, S8, S13, S14, S15, S16 +4
28
D
D1, D2, D3, D4, D5, D6, D7, D8 +20
27
SK6812MINI
D28, D29, D30, D31, D32, D33, D34, D35 +19
1
SK6812MINI
D56

Jamboard rounded design files

The KiCad project lives in the jamdotjar/jam56s repository on GitHub; these links point at the commit this page was built from.

Jamboard rounded: common questions

What microcontroller does the Jamboard rounded use?

The Jamboard rounded is built around the Pico, from the RP2040/RP2350 family.

How big is the Jamboard rounded PCB?

The Jamboard rounded measures 140.5 × 117 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Jamboard rounded?

86 components, from 7 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 Jamboard rounded design files?

From the jamdotjar/jam56s repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Jamboard rounded design in my own project?

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

Can I test firmware for the Jamboard rounded 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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