HardLabs

Luluu

fu5ha·luluu·hardware/luluu.kicad_pcb

Luluu PCB layout, top view — open source RP2040/RP2350 board by fu5ha

About the Luluu PCB

Luluu is an open source RP2040/RP2350 PCB design by fu5ha, published on GitHub. It is a 4-layer board measuring 64 × 30 mm, with 57 components from 24 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q128JVSS, RT9080-33GJ5, TP4054-42 and LIS3DH. By type, the board carries 22 capacitors, 20 resistors, 5 ICs, 3 connectors, 2 transistors and 2 switches.

From the project

A cute and smart arm warmer sleeve ^_^

The main part of this folder is the KiCad project for the main PCB. Open it with KiCad v7+. There are production files for PCB production and assembly from JLCPCB in the production/ folder. There is also a small 3d printed "front panel" part with exported STL files in the FrontPanel/ folder.

You can view an explorable online version of the schematic and board layout here: https://kicanvas.org/?github=https%3A%2F%2Fgithub.com%2Ffu5ha%2Fluluu%2Ftree%2Fmain%2Fhardware

Main components on the Luluu

W25Q128JVSSRT9080-33GJ5RP2040TP4054-42LIS3DH

Luluu bill of materials (BOM)

57 components, 24 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
W25Q128JVSS
U1
1
RT9080-33GJ5
U2
1
RP2040
U3
1
TP4054-42
U4
1
LIS3DH
U5
1
AO3401A
Q1
1
BSS138
Q2
1
X322512MSB4SI
Y1
1
C585350
Micro_SD_Card
J4
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J6
1
DISP_LCD_ST7789
J7
1
C318884
SW_B
SW1
1
C318884
SW_A
SW2
1
SS34
D1
1
C2296
CHRG
D2
11
100NF
100nf
C1, C10, C11, C13, C14, C15, C16, C17 +3
7
10UF
10uf
C2, C5, C6, C7, C8, C20, C22
2
30PF
30pf
C3, C4
2
1UF
1uf
C9, C12
10
10K
10k
R1, R2, R3, R7, R9, R13, R14, R15 +2
Show 4 more
QtyPartRefs
2
1k
R4, R16
2
27
R5, R6
5
5.1K
5.1k
R8, R10, R11, R18, R19
1
10
R12

Luluu design files

The KiCad project lives in the fu5ha/luluu repository on GitHub; these links point at the commit this page was built from.

Luluu: common questions

What microcontroller does the Luluu use?

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

How big is the Luluu PCB?

The Luluu measures 64 × 30 mm, has 4 copper layers and is 1 mm thick.

How many components are on the Luluu?

57 components, from 24 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 Luluu design files?

From the fu5ha/luluu 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 Luluu design in my own project?

The repository has no license, so all rights stay with fu5ha. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Luluu 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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