2 layers116.8 × 116.8 mm
Bentoboard
torbers/bentoboard
as many ready-to-use electronics as i could fit on a 4"x4" PCB.
381 parts
4 layers64 × 30 mm
Luluu rounded
fu5ha/luluu9A cute and smart arm warmer sleeve ^_^
- Size
- 64 × 30 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 71
- Nets
- 75
- Pads
- 313
- Tracks, vias
- 729, 150
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 11 Oct 2023
- Updated
- 28 Nov 2023
Overview
Luluu rounded is an open-source printed circuit board by fu5ha, from the fu5ha/luluu repository on GitHub. It is a 4-layer board of 64 × 30 mm with 71 parts on 75 nets, routed with 729 tracks and 150 vias.
It is built around the RP2040, LIS3DH and RT9080-33GJ5, with the AO3401A, BSS138 and SS34 among its other parts. Its parts include 22 capacitors, 20 resistors, 8 connectors, 5 ICs and 3 switches. It belongs with the RP2040 boards of this library.
Main components
7
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
LIS3DH
LGA-16(3x3)-40℃~+85℃ 1.71V~3.6V 16bit 500nA Accelerometer Motion event detection SPI、I2C X,Y,Z ±16g LGA-16(3x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
RT9080-33GJ5
TSOT-23-5-40℃~+125℃@(Tj) 1 2uA 3.3V 360mV@(600mA) 42uVrms 5.5V 600mA 75dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive TSOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSRichtek TechVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
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 SemiconductorMOSFETsBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
SS34
SMA(DO-214AC)-55℃~+125℃ 3A 40V 500uA@40V 550mV@3A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
X322512MSB4SI
SMD3225-4P-40℃~+85℃ 12MHz 20pF 80Ω Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
README
hardware/README.mdHardware
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.
Online Schematic and Board View
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
Order and assembly
The board is specifically designed to be economic and easy to order with JLCPCB's "economic" PCB assembly service. Boards received from JLC will be mostly-assembled but still require a few pieces of hand assembly: installing the battery connector, power switch, display connection cable, (optionally) debug connectors, and (optionally) STEMMAqt connector.
TODO: document BOM, assembly process, etc more
Front Panel
The front panel part was designed in OnShape. The exported files (printed at JLCPCB in my case but could be printed on
any 3d printer really) can be found in the FrontPanel/ folder. The original OnShape document can be viewed and
remixed here:
Parts
71| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100nf | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C10, C11, C13, C14, C15, C16, C17, C18, C19, C23 |
| 10 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R7, R9, R13, R14, R15, R17, R20 |
| 7 | 10uf | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C5, C6, C7, C8, C20, C22 |
| 5 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R10, R11, R18, R19 |
| 3 | MH | luluu:MountingHole_1.3mm_M1.2_Pad | H1, H2, H3 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R16 |
| 2 | 1uf | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C9, C12 |
| 2 | 27 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R6 |
| 2 | 30pf | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C3, C4 |
| 2 | MH | luluu:MountingHole_1.3mm_M1.2 | H4, H5 |
| 1 | 10 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Accel Addr LSB | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP3 |
| 1 | BATT_CON | Connector_JST:JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J1 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | CHRG | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | DISP_LCD_ST7789 | luluu:FPC_24_JUSHUO_AFC04-S24XCA-00 | J7 |
| 1 | GPIO0 | luluu:PinHeader_1x06_P2.54mm_Vertical | J5 |
| 1 | GPIO1 | luluu:PinHeader_1x07_P2.54mm_Vertical | J8 |
| 1 | LIS3DH | Package_LGA:LGA-16_3x3mm_P0.5mm_LayoutBorder3x5y | U5 |
| 1 | Micro_SD_Card | Connector_Card:microSD_HC_Molex_104031-0811 | J4 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U3 |
| 1 | RPi SWD | Connector_JST:JST_SH_BM03B-SRSS-TB_1x03-1MP_P1.00mm_Vertical | J2 |
| 1 | RT9080-33GJ5 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | SS34 | Diode_SMD:D_SMA_Handsoldering | D1 |
| 1 | STEMMA_{QT} I_{2}C | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J3 |
| 1 | SW_A | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW2 |
| 1 | SW_A_JMPER | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP1 |
| 1 | SW_B | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | SW_B_JMPER | Jumper:SolderJumper-3_P1.3mm_Bridged12_RoundedPad1.0x1.5mm | JP2 |
| 1 | SW_POWER | luluu:SW_SPDT_PCM12 | SW3 |
| 1 | TP4054-42 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J6 |
| 1 | W25Q128JVSS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U1 |
| 1 | X322512MSB4SI | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
Questions
How big is the Luluu rounded PCB?
It measures 64 × 30 mm and has 4 copper layers, 1 mm thick.
What parts does the Luluu rounded use?
71 parts, built around the RP2040, LIS3DH, RT9080-33GJ5 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 Luluu rounded KiCad files?
From the fu5ha/luluu repository on GitHub, at the commit this page was made from: the board is hardware/luluu-rounded.kicad_pcb and its schematic hardware/luluu.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Luluu rounded design in my own project?
Its repository states no licence, so its author keeps all rights: ask fu5ha before reusing the design.
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