UHBadge

About the UHBadge PCB

UHBadge is an open source RP2040/RP2350 PCB design by gianluca-rainis, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 70 × 119.5 mm, with 82 components from 41 distinct parts.

Its main chip is the RP2350A, from the RP2040/RP2350 family. Other key parts include the MCP73871, W25Q128JVS, SRV05-4, Conn and ST25DV64K-JFR6D3. By type, the board carries 34 capacitors, 19 resistors, 7 ICs, 7 switches, 7 diodes and 3 connectors.

It belongs with the wearables designs in this gallery.

From the project

Universal Hacker Badge - The ultimate badge for hackers.

AI tools were used as writing assistants for parts of the firmware, to help write technical drivers and low-level functions. All content has been reviewed, verified, and edited by the author.

You'll find the UHBadge.uf2 file in the firmware/build directory.

Main components on the UHBadge

RP2350A MCP73871 W25Q128JVS SRV05-4 Conn ST25DV64K-JFR6D3 Radio Module 2

UHBadge bill of materials (BOM)

82 components, 41 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2350A	QFN-60-1EP_7x7mm_P0.4mm_EP3.4x3.4mm	U1
1	MCP73871	QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm	U2
1	W25Q128JVS	SOIC-8_5.3x5.3mm_P1.27mm	U3
1	SRV05-4	SOT-23-6	U4
1	Conn	Jushuo_AFC07-S24FCA-00_1x24-1MP_P0.50_Horizontal	U5
1	ST25DV64K-JFR6D3	ST_UFDFPN-12-1EP_3x3mm_P0.5mm_EP1.4x2.55mm	U6
1	Radio Module 2	rpi_rmc20452t	U7
1	SI1308EDL Si1308EDL	SOT-323_SC-70	Q1
1	ABM8-272-T3	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	LEMO2	Molex_CLIK-Mate_502494-0270_1x02-1MP_P2.00mm_Horizontal	J3
1	Micro_SD_Card	microSD_HC_Hirose_DM3AT-SF-PEJM5	J4
1	USB_C_PLUG_USB2.0 USB_C_Plug_USB2.0	USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	P1
1	Boot	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW1
1	Run	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW2
1	Up	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW3
1	Down	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW4
1	Left	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW5
1	Right	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW6
1	Confirm	SW_SPST_EVQP2_MiddlePushTravel_H2.5mm	SW7
4	LED	LED_0805_2012Metric	D1, D2, D3, D4

Show 21 more

Qty	Part	Footprint	Refs
3	MBR0530	D_SOD-123	D5, D6, D7
1	3.3U 3.3u	Inductor	L1
1	NFC Antenna	NFC_Antenna	L2
1	47uH 500mA	L_APV_ANR4018	L3
7	4.7UF 4.7uF	C_0402_1005Metric	C1, C2, C3, C16, C17, C34, C35
11	100NF 100nF	C_0402_1005Metric	C4, C5, C6, C7, C8, C9, C10, C11 +3
2	10UF 10uF	C_0402_1005Metric	C18, C36
2	15PF 15pF	C_0402_1005Metric	C20, C21
1	33PF 33pF	C_0402_1005Metric	C22
1	0.1UF 0.1uF	C_0402_1005Metric	C23
10	1UF 1uF	C_0402_1005Metric	C24, C25, C26, C27, C28, C29, C30, C31 +2
1	33Ω	R_0402_1005Metric	R1
2	27Ω	R_0402_1005Metric	R2, R3
1	5.1kΩ	R_0402_1005Metric	R4
4	470Ω	R_0402_1005Metric	R5, R6, R7, R18
1	0Ω	R_0402_1005Metric	R8
3	1kΩ	R_0402_1005Metric	R9, R10, R11
4	10kΩ	R_0402_1005Metric	R12, R13, R14, R19
1	47Ω	R_0402_1005Metric	R15
1	1MΩ	R_0402_1005Metric	R16
1	2.2Ω	R_0402_1005Metric	R17

UHBadge design files

The KiCad project lives in the gianluca-rainis/UHBadge repository on GitHub; these links point at the commit this page was built from.

UHBadge: common questions

What microcontroller does the UHBadge use?

The UHBadge is built around the RP2350A, from the RP2040/RP2350 family.

How big is the UHBadge PCB?

The UHBadge measures 70 × 119.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the UHBadge?

82 components, from 41 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 UHBadge design files?

From the gianluca-rainis/UHBadge repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the UHBadge design in my own project?

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

Can I test firmware for the UHBadge 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.