4 layers85.4 × 106.8 mm
BioSense
KrystianRuszczak/BioSense
The hardware design files in this directory are licensed under CERN-OHL-P-2.0. See LICENSE.
92 partsMIT
2 layers21 × 51 mm
Nyx is a RP2040 based dev board with a built in li-ion battery charger and the same pinout and board size as a normal pico also comes with few extra GPIO!
- Size
- 21 × 51 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 61
- Pads
- 225
- Tracks, vias
- 541, 60
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 25 Jul 2026
- Updated
- 3 Aug 2026
Overview
Nyx is an open-source printed circuit board by Shadow220108, from the Shadow220108/Nyx repository on GitHub. It is a 2-layer board of 21 × 51 mm with 52 parts on 61 nets, routed with 541 tracks and 60 vias.
It is built around the RP2040, W25Q128JVSIQ and BQ21040DBV, with the AO3401A among its other parts. Its parts include 19 capacitors, 12 resistors, 5 connectors, 4 ICs and 2 diodes. It belongs with the power and microcontroller boards boards and the RP2040 boards of this library.
Main components
4
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
BQ21040DBV
SOT-23-60℃~+125℃ 1 125uA 3.5V~28V 4.2V 800mA Charging IC Support SOT-23-6 Battery Management ROHSTexas InstrumentsBattery Management
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
README.md
Nyx
Nyx is a RP2040 based dev board with a built in li-ion battery charger and the same pinout and board size as a normal pico also comes with few extra GPIO!
Features
- RP2040 MCU - Dual ARM Cortex-M0+ @ 133MHz MCU.
- Very compact, RPI PICO inspired formfactor.
- 5V and 3.3V power pins.
- LiPo Battery support and charging circuit
- USB C - for programming and power.
PCB Design
 |
|---|
The PCB is 2 layers with dimensions 21x51mm, made to be easily replacable to any Xiao board.
All the PCB files are here
Schematics
Here are the schematic designs,
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|---|
Why was it made?
Everybody has used a Raspberry Pi pico, that was my go to for most of the simple projects as well, one thing that always bugged me was the battery which I had always had to charge after a couple of days of using my project, thats why I am planning to build a custom devboard with on board battery charging system
How you can get one for yourself?
That is pretty easy, you have all the files you will need in the production folder, order the development
board from any PCB fab ( I chose JLC cause its cheap and has good quality ) and BINGO! You will have it
to use for any purpose you want!
How do you use it?
You can use it as any normal RP2040 Devboard, enter the boootloader mode
by holding the BOOT buttom while connecting to your device, flash it with
firmware and you are good to go!
BOM
| Name | Purpose | Quantity | Total Cost (USD) | Link | Distributor |
|---|---|---|---|---|---|
| PCBA | Development Board | 2 | 53.02 | https://jlcpcb.com/ | JLCPCB |
| Total | 53.02 |
LCSC BOM for the components on board is here
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C3, C4, C5, C6, C7, C8, C9, C11, C12, C17 |
| 6 | LOGO | LOGO | G***, G***, G***, G***, G***, G*** |
| 4 | 1K | Resistor_SMD:R_0402_1005Metric | R5, R6, R9, R11 |
| 4 | 1uF | Capacitor_SMD:C_0402_1005Metric | C1, C10, C18, C19 |
| 2 | 10K | Resistor_SMD:R_0402_1005Metric | R7, R10 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4, J5 |
| 2 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J2, J3 |
| 1 | 1.5K | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 3.2K | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BQ21040DBV | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | D_Schottky | Diode_SMD:D_0402_1005Metric | D1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | MCP1700x-330xxTT | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | W25Q128JVS | Package_SON:Winbond_USON-8-1EP_3x2mm_P0.5mm_EP0.2x1.6mm | U3 |
Questions
How big is the Nyx PCB?
It measures 21 × 51 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Nyx use?
52 parts, built around the RP2040, W25Q128JVSIQ, BQ21040DBV and AO3401A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Nyx KiCad files?
From the Shadow220108/Nyx repository on GitHub, at the commit this page was made from: the board is PCB/nyx.kicad_pcb and its schematic PCB/nyx.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Nyx design in my own project?
Its repository states no licence, so its author keeps all rights: ask Shadow220108 before reusing the design.
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