HardLabs

Blu board

fajr-lilypad·blu-board·PCB Design/CustomDevBoard.kicad_pcb

Blu board layout, top view — open source RP2040/RP2350 board by fajr-lilypad

About the Blu board

Blu board is an open source RP2040/RP2350 PCB design by fajr-lilypad, published on GitHub. It is a 2-layer board measuring 21 × 51 mm, with 36 components from 18 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the MCP1700x-330xxTT and W25Q128JVS. By type, the board carries 18 capacitors, 8 resistors, 4 connectors, 3 ICs, 1 crystal and 1 switch.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

A custom devboard (my first!) Built off of a RP2040, special LED. A more advanced project so I could get used to complex routing, placement, and assembly.

Blu-Board is a custom devboard (my first!) Built off of a RP2040, this is a more advanced project so I could get used to complex routing, placement, and assembly. I started this off using a guide, which I consulted for fabrication, materials, and for when I ran into DRC errors I'm not familair with. I decided to customize it and add a special LED that will glow periodically. I made it with the intention of creating a PCB that would be my most diificult to route yet in order to challenge myself, and it definetly was! I had a goal of creating a clean and compact pcb design, one that is…

Blu board, from the project README
From the project README

Main components on the Blu board

RP2040MCP1700x-330xxTTW25Q128JVS

Blu board bill of materials (BOM)

36 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
U1
1
MCP1700x-330xxTT
U2
1
W25Q128JVS
U3
1
12 MHz
Y1
1
USB_C_Receptacle_USB2.0_14P
J1
2
Conn_01x20
J2, J3
1
Conn_01x03
J4
1
SW_Push
SW2
1
WS2812B
D1
2
1uF
C1, C10
12
0.1uF
C2, C3, C4, C5, C6, C7, C8, C9 +4
2
10uF
C13, C14
2
33pF
C15, C16
2
5.1K
R1, R2
2
27
R3, R4
2
1K
R5, R7
1
10K
R6
1
330
R8

Blu board design files

The KiCad project lives in the fajr-lilypad/blu-board repository on GitHub; these links point at the commit this page was built from.

Blu board: common questions

What microcontroller does the Blu board use?

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

How big is the Blu board?

The Blu board measures 21 × 51 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Blu board?

36 components, from 18 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 Blu board design files?

From the fajr-lilypad/blu-board 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 Blu board design in my own project?

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

Can I test firmware for the Blu board 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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