Osu mania-4k keyboard

abieprGithub·osu-mania-4k-keyboard·PCB/osu-mania-4k.kicad_pcb

About the Osu mania-4k keyboard PCB

Osu mania-4k keyboard is an open source RP2040/RP2350 PCB design by abieprGithub, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 42 mm, with 24 components from 7 distinct parts.

Its main chip is the Module_XIAO-RP2040, from the RP2040/RP2350 family. Other key parts include the ER_OLEDM0.91_1x-I2C. By type, the board carries 10 resistors, 4 switches, 4 diodes, 4 capacitors, 1 IC and 1 module.

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

From the project

A custom-made 4-key keyboard designed for 4K osu!mania

As the name suggest, this is a hackpad that is tuned for osu!mania (the keyboard rhythm game), and only has four keys!

Note: following image is still just the PCB, will update soon once the CAD is complete.

For some background, this is technically not my first hackclub project. I've circled the idea of following the Hackpad mission for some time now, and at the same time, I started playing the game osu!mania competitively, while using my laptop's keyboard. After one million taps on a single set of four keys, I finally decided to make one. Additionally, while my ThinkPad's keyboard is…

Osu mania-4k keyboard, from the project README — From the project README

Main components on the Osu mania-4k keyboard

ER_OLEDM0.91_1x-I2C

Osu mania-4k keyboard bill of materials (BOM)

24 components, 7 distinct parts.

Qty	Part	Footprint	Refs
1	ER_OLEDM0.91_1x-I2C	ER_OLEDM0.91_1x-I2C	U1
1	Module_XIAO-RP2040	SeeedStudio_XIAO_RP2040	M1
4	SW_Push	SW_Cherry_MX_PCB_1.00u	SW1, SW2, SW3, SW4
4	SK6812MINI-E	LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount	D1, D2, D3, D4
4	100nF	C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C2, C3, C4
9	10K	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R1, R2, R3, R4, R6, R7, R8, R9 +1
1	220	R_0805_2012Metric_Pad1.15x1.40mm_HandSolder	R5

Osu mania-4k keyboard design files

The KiCad project lives in the abieprGithub/osu-mania-4k-keyboard repository on GitHub; these links point at the commit this page was built from.

LayoutPCB/osu-mania-4k.kicad_pcb
SchematicPCB/osu-mania-4k.kicad_sch

Osu mania-4k keyboard: common questions

What microcontroller does the Osu mania-4k keyboard use?

The Osu mania-4k keyboard is built around the Module_XIAO-RP2040, from the RP2040/RP2350 family.

How big is the Osu mania-4k keyboard PCB?

The Osu mania-4k keyboard measures 100 × 42 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Osu mania-4k keyboard?

24 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Osu mania-4k keyboard design files?

From the abieprGithub/osu-mania-4k-keyboard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Osu mania-4k keyboard design in my own project?

Yes, under the terms of its MIT license, which abieprGithub chose for the repository.

Can I test firmware for the Osu mania-4k keyboard 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.