HardLabs

NexusCard

aln730·NexusCard

NexusCard PCB layout, top view — open source RP2040/RP2350 board by aln730

About the NexusCard PCB

NexusCard is an open source RP2040/RP2350 PCB design by aln730, published on GitHub. It is a 2-layer board measuring 17.7 × 15 mm, with 3 components from 3 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117-1.5_SOT223 and W25Q128JVS.

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

From the project

The next-gen business card

- USB HID functionality - Micro-OLED display - NFC tag with static UID switching - IR transmitter - Rechargeable via USB-C

- [x] Select microcontroller (RP2350) - [x] Choose OLED display (I2C) - [ ] Add NFC tag with static UID toggle - [ ] Add IR transmitter (38kHz) - [x] Include USB-C port with CC resistors - [ ] Add TP4056 for battery charging - [x] Design schematic in KiCad - [ ] Route PCB to standard card size (85mm x 54mm) - [ ] Order and assemble test PCBs

Main components on the NexusCard

NCP1117-1.5_SOT223W25Q128JVSRP2040

NexusCard bill of materials (BOM)

3 components, 3 distinct parts.

QtyPartRefs
1
NCP1117-1.5_SOT223
U1
1
W25Q128JVS
U2
1
RP2040
U3

NexusCard design files

The KiCad project lives in the aln730/NexusCard repository on GitHub; these links point at the commit this page was built from.

NexusCard: common questions

What microcontroller does the NexusCard use?

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

How big is the NexusCard PCB?

The NexusCard measures 17.7 × 15 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the NexusCard?

3 components, from 3 distinct parts. The full bill of materials is listed on this page.

Where can I download the NexusCard design files?

From the aln730/NexusCard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the NexusCard design in my own project?

The repository has no license, so all rights stay with aln730. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the NexusCard 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.

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