Nanosplit

cveldy·nanosplit·src/kicad/nanosplit/nanosplit.kicad_pcb

About the Nanosplit PCB

Nanosplit is an open source RP2040/RP2350 PCB design by cveldy, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 300 × 120 mm, with 46 components from 14 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the TLV73333PDBV and W25Q128JVS. By type, the board carries 18 switches, 16 capacitors, 7 resistors, 3 ICs and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

Leverless (Hitbox-style) fighting game controller with a split-hand design using Cherry MX Ultra Low Profile (ULP) switches.

Fully assembled, dimensions are 304 x 124 x 9.8mm (including bolts and non-slip pads, 8.6mm without).

Powering this device is OpenStick's excellent GP2040-CE gamepad firmware. Please see that repository for information about configuration, console compatibility, and all the rest.

Nanosplit, from the project README — From the project README

Main components on the Nanosplit

TLV73333PDBV W25Q128JVS RP2040

Nanosplit bill of materials (BOM)

46 components, 14 distinct parts.

Qty	Part	Footprint	Refs
1	TLV73333PDBV	SOT-23-5	U1
1	W25Q128JVS	SOIC-8_5.23x5.23mm_P1.27mm	U2
1	RP2040	RP2040-QFN-56	U3
1	Crystal_GND24	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
16	SW_Push	Cherry_ULP_TH	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +8
2	SW_Push	SW_SPST_Omron_B3FS-100xP	SW19, SW20
1	HRO-TYPE-C-31-M-12	HRO-TYPE-C-31-M-12-Assembly	USB1
4	1u	C_0402_1005Metric	C1, C4, C8, C10
2	30p	C_0402_1005Metric	C2, C3
10	100n	C_0402_1005Metric	C5, C6, C7, C9, C11, C12, C13, C14 +2
2	1k	R_0402_1005Metric	R1, R5
1	10k	R_0402_1005Metric	R2
2	27	R_0402_1005Metric	R3, R4
2	5.1k	R_0402_1005Metric	R6, R7

Nanosplit design files

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

Layoutsrc/kicad/nanosplit/nanosplit.kicad_pcb
Schematicsrc/kicad/nanosplit/nanosplit.kicad_sch

Nanosplit: common questions

What microcontroller does the Nanosplit use?

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

How big is the Nanosplit PCB?

The Nanosplit measures 300 × 120 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Nanosplit?

46 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the Nanosplit design files?

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

Can I use the Nanosplit design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which cveldy chose for the repository.

Can I test firmware for the Nanosplit 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.