HardLabs

Single panel

qubixal·qbMX

Single panel PCB layout, top view — open source RP2040/RP2350 board by qubixal
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About the Single panel PCB

Single panel is an open source RP2040/RP2350 PCB design by qubixal, published on GitHub. It is a 2-layer board measuring 22.1 × 52 mm, with 203 components from 8 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 85 switches, 85 diodes, 15 inductors, 15 capacitors, 1 IC and 1 module.

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

From the project

Keyboard for Hack Club KEEB

qbMX is a fully custom mechanical keyboard designed in KiCad and Fusion. It features:

- 85-key (79+6) layout with a rotary encoder, modelled after Apple's Magic Keyboard. - Cherry MX Low-Profile Red switches, and on-plate stabalisers (instead of on-pcb) - Uses the RP2040 microcontroller (Orpheus Pico) - A 0.91" 128x32 OLED display - 15 mini-LEDs at the top of the keyboard - Custom PCB, ordered and assembled by me

Single panel, from the project README
From the project README

Main components on the Single panel

ER_OLEDM0.91_1x-I2CRaspberryPi_Pico

Single panel bill of materials (BOM)

203 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ER_OLEDM0.91_1x-I2C
U1
1
RaspberryPi_Pico
A1
1
1N4148W
RED1
9
Push
SW1, SW28, SW30, SW45, SW57, SW59, SW70, SW76 +1
76
Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +68
85
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +77
15
SK6812MINI-E
L1, L2, L3, L4, L5, L6, L7, L8 +7
15
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +7

Single panel design files

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

Single panel: common questions

What microcontroller does the Single panel use?

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

How big is the Single panel PCB?

The Single panel measures 22.1 × 52 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Single panel?

203 components, from 8 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 Single panel design files?

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

Can I use the Single panel design in my own project?

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

Can I test firmware for the Single panel 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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