HardLabs

Keystone

sahilchess·keystone

Keystone PCB layout, top view — open source RP2040/RP2350 board by sahilchess

About the Keystone PCB

Keystone is an open source RP2040/RP2350 PCB design by sahilchess, published on GitHub. It is a 2-layer board measuring 497.9 × 131.1 mm, with 199 components from 9 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. Other key parts include the ER_OLEDM0.91_1x-I2C. By type, the board carries 94 switches, 90 diodes, 6 inductors, 6 capacitors, 1 IC and 1 module.

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

From the project

a custom mechanical keyboard: cherry mx switches, rp2040?, oled, rgbs and more????

Main components on the Keystone

ER_OLEDM0.91_1x-I2CRaspberryPi_Pico

Keystone bill of materials (BOM)

199 components, 9 distinct parts.

QtyPartRefs
1
ER_OLEDM0.91_1x-I2C
U1
1
RaspberryPi_Pico
A1
3
MX_stab
S1, S2, S3
1
space
S4
90
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +82
90
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +82
6
WS2812B
L1, L2, L3, L4, L5, L6
6
100nf
C1, C2, C3, C4, C5, C6
1
330
R1

Keystone design files

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

Keystone: common questions

What microcontroller does the Keystone use?

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

How big is the Keystone PCB?

The Keystone measures 497.9 × 131.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keystone?

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

Where can I download the Keystone design files?

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

Can I use the Keystone design in my own project?

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

Can I test firmware for the Keystone 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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