0xB2

plut0nium·0xB2·pcb/0xB2.kicad_pcb

About the 0xB2 PCB

0xB2 is an open source RP2040/RP2350 PCB design by plut0nium, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 17.8 × 33 mm, with 36 components from 18 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the GD25Q80CEIGR and XC6210B332MR-G. By type, the board carries 14 capacitors, 11 resistors, 3 ICs, 2 switches, 2 diodes and 1 crystal.

From the project

Pro-Micro/Elite-C replacement with RP2040 and USB-C

Designed for use in custom mechanical (split) keyboards, but many other uses are possible.

Pro-micro / Sparkfun RP2040 compatible footprint, with 5 extra pins at bottom (Elite-C style) Raspberry Pi RP2040 MCU Up to 16MB flash memory (depending on component selection and availability) User LED & USB VBUS detect Low profile USB-C mid-mount connector Designed to be manufactured and assembled by all common PCBA services (including JLCPCB)

0xB2, from the project README — From the project README

Main components on the 0xB2

RP2040 GD25Q80CEIGR XC6210B332MR-G

0xB2 bill of materials (BOM)

36 components, 18 distinct parts.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	GD25Q80CEIGR	USON-8-1EP_3x2mm_P0.5mm_EP0.25x1.65mm	U2
1	XC6210B332MR-G	SOT-23-5	U3
1	Crystal_GND24	Crystal_SMD_2520-4Pin_2.5x2.0mm	Y1
1	USB_C_Receptacle_USB2.0	USB_C_Receptacle_HRO_TYPE-C-31-M-13B	J1
1	Polyfuse	Fuse_0603_1608Metric	F1
2	SW_Push	SW_SPST_CK_KXT3	SW1, SW2
1	LED	LED_0402_1005Metric	D1
1	B5817	D_SOD-323	D2
1	FerriteBead_Small	L_0603_1608Metric	FB1
2	1µ	C_0603_1608Metric	C1, C2
2	15p	C_0402_1005Metric	C3, C4
2	1µ	C_0402_1005Metric	C5, C6
8	100n	C_0402_1005Metric	C7, C8, C9, C10, C11, C12, C13, C14
3	1k	R_0402_1005Metric	R1, R3, R8
3	10k	R_0402_1005Metric	R2, R9, R11
3	5.1k	R_0402_1005Metric	R4, R5, R10
2	27	R_0402_1005Metric	R6, R7

0xB2 design files

The KiCad project lives in the plut0nium/0xB2 repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/0xB2.kicad_pcb
Schematicpcb/0xB2.kicad_sch

0xB2: common questions

What microcontroller does the 0xB2 use?

The 0xB2 is built around the RP2040, from the RP2040/RP2350 family.

How big is the 0xB2 PCB?

The 0xB2 measures 17.8 × 33 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the 0xB2?

36 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the 0xB2 design files?

From the plut0nium/0xB2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 0xB2 design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which plut0nium chose for the repository.

Can I test firmware for the 0xB2 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.