Eobard

primevivian·eobard·eobard-kicad/eobard.kicad_pcb

About the Eobard PCB

Eobard is an open source RP2040/RP2350 PCB design by primevivian, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 123.5 × 110.3 mm, with 20 components from 4 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. By type, the board carries 17 switches, 2 connectors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A split ortholinear 34 key keyboard based on the Raspberry Pi Pico.

The columns are spaced out vertically so as to provide the most comfortable typing experience for my hand size. It is designed to be cheap to manufacture and simple to assemble. The single PCB is dual sided, only having to be flipped around for assembly of the other side.

- [x] Update files to KiCad 10.0. - [x] Update footprints to comply with more standard libraries and parts. - [x] Simplify design as much as possible. - [ ] Build diodeless prototype. - [ ] Write Firmware in C. - [ ] Release First Version.

Eobard, from the project README — From the project README

Main components on the Eobard

Pico

Eobard bill of materials (BOM)

20 components, 4 distinct parts.

Qty	Part	Footprint	Refs
1	Pico	RPi_Pico_SMD_TH	U1
1	UART JACK LEFT	PJ-320A	J1
1	UART Jack Right	PJ-320A	J3
17	SW_SPST	SW_MX_reversible	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +9

Eobard design files

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

Layouteobard-kicad/eobard.kicad_pcb
Schematiceobard-kicad/eobard.kicad_sch

Eobard: common questions

What microcontroller does the Eobard use?

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

How big is the Eobard PCB?

The Eobard measures 123.5 × 110.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Eobard?

20 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the Eobard design files?

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

Can I use the Eobard design in my own project?

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

Can I test firmware for the Eobard 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.