4 layers31.8 × 15.3 mm
Tracker PCB
NicholasKorth/Slim-Sleep-Tracker
A low-profile wrist wearable that measures motion, optical heart rate and SpO2 and streams them over Bluetooth LE to a PC visualizer.
64 parts
4 layers15 × 29.2 mm
Fuimini V2
Zipra1/Fuimini-V23nRF flavoured SlimeVR-compatible trackers. Now with higher volume production in mind!
- Size
- 15 × 29.2 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 62
- Nets
- 61
- Pads
- 301
- Tracks, vias
- 960, 94
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Jun 2025
- Updated
- 10 Feb 2026
Overview
Fuimini V2 is an open-source printed circuit board by Zipra1, from the Zipra1/Fuimini-V2 repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 4-layer board of 15 × 29.2 mm with 62 parts on 61 nets, routed with 960 tracks and 94 vias.
It is built around the NRF52833-QDAA-R, EA8103T5R and ANT162442ST-1000AM1, with the ICM-45686, LGS4056HDA and SSP7615-33DFR among its other parts. Its parts include 27 capacitors, 13 resistors, 7 ICs, 3 inductors and 2 switches. It belongs with the nRF52 and nRF5x boards of this library.
Main components
12
NRF52833-QDAA-R
QFN-40-EP(5x5)QFN-40-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSNordic SemiconMicrocontrollers (MCU/MPU/SOC)
EA8103T5R
SOT-23-5-40℃~+85℃ 1 1.13V 1.2A 1.35MHz 1uA 2.6V~6V Adjustable Buck Buck Built-in Yes SOT-23-5 DC-DC Converters ROHSEveranalog IC designDC-DC ConvertersANT162442ST-1000AM1
SMD-6P,1.6x0.8mm-40℃~+85℃ 0.4mm 0.8mm 1.6dBi 1.6mm 2.442GHz 3 50Ω 800mW 84MHz Patch Antenna SMD-6P,1.6x0.8mm Antennas ROHSTDKAntennas
ICM-45686
LGA-14(3x2.5)-40℃~+85℃ 1.71V~3.6V 16bit 2.2uA 8KB IMU (accelerometer + gyroscope) Motion event detection SPI、I2C X,Y,Z X,Y,Z ±32g ±4000dps LGA-14(3x2.5) Accelerometers ROHSTDK InvenSenseAccelerometers
LGS4056HDA
DFN-8(2x2)-40℃~+85℃ 1 1A 4.2V 40uA 4V~6V Charging IC Support Support DFN-8(2x2) Battery Management ROHSLegend-SiBattery Management
SSP7615-33DFR
DFN-4(1x1)-40℃~+125℃@(Tj) 1 3.3V 400mA 400mV@(200mA) 450nA 60dB@(1kHz) 8V Fixed Over Current Protection、Enable、Short Circuit Protection Positive DFN-4(1x1) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSShanghai Siproin MicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1TS026A-1100-0550-CT
SMD-4P,2.6x1.6mm-40℃~+90℃ 0.55mm 1.1N 1.6mm 12V 2.6mm 200,000 Cycles 50mA Black IP68 No Round Button SMD(SMT) Tab SPST Surface Mount,Vertical Without Bracket SMD-4P,2.6x1.6mm Tactile Switches ROHSHYPTactile Switches
LQM18FN1R0M00D
0603120MHz 150mA 150mA 1uH 260mΩ ±20% 0603 Inductors (SMD) ROHSMurataInductors (SMD)
MHPA0808RGBDT
SMD,0.8x0.8mm-40℃~+85℃ 0.6mm 0.8mm 0.8mm 120° Black frosted lens Common Anode R:1.7V~2.3V、G:2.5V~3.5V、B:2.5V~3.5V R:16.5mcd~27.8mcd、G:27.7mcd~46.8mcd、B:7.5mcd~12.6mcd R:2000V、G:1000V、B:1000V R:20mA、G:20mA、B:20mA R:50mW、G:60mW、B:60mW R:619.5nm~624.5nm、G:529.5nm~533.5nm、B:463.5nm~467.5nm SMD,0.8x0.8mm RGB LEDs ROHSMEIHUARGB LEDs
SX2M32.768KM20F30TNN
SMD2520-4P-40℃~+85℃ 1.62V~3.63V 32.768kHz 90uA CMOS ±20ppm ±30ppm SMD2520-4P Crystal Oscillators ROHSShenzhen SCTF ElecCrystal OscillatorsTPD3E001DRYR-TP
SON-6(1x1.5)-55℃~+150℃ 1.5pF 100nA 15V 5.5V 8V ESD IEC 61000-4-2、IEC 61000-4-4 SON-6(1x1.5) ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
XL4EL89CKI-111YLC-32M
SMD1612-4P-40℃~+85℃ 150Ω 32MHz 8pF Crystal Oscillator ±10ppm ±20ppm SMD1612-4P Crystals ROHSYXCCrystals
README
README.mdFuimini V2
For sale now at https://www.macroplastics.ca !
nRF52833-based smol SlimeVR tracker LSM6DSV and ICM-45686 variants available
Design is optimized for manufacturability at medium scales & comfort
If making yourself:
Boards bought from macroplastics.ca come pre-flashed with bootloader and firmware. Please solder the battery before plugging in! Otherwise, it will appear faulty.
Cases intended for 301525 batteries, exact dimensions 13x27x3mm
The case labelled "small battery" is actually the regular size of battery. The other variant is because sometimes when ordering batteries the size can be a bit off.
Since I have yet to make proper instructions, feel free to contact me for help with assembly: @fui__ on Discord.
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10uF | beaLib:C_0402_JLC | C1n1, C1n2, C1n3, C1n5 |
| 4 | 1uF | beaLib:C_0201_JLC | C3r1, C3r2, C12, C13 |
| 4 | 4.7uF | beaLib:C_0201_JLC | C6, C15, C18, C19 |
| 3 | 100nF | beaLib:C_0201_JLC | C5, C7, C11 |
| 3 | 5.1k | beaLib:R_0201_JLC | R1, R1C3, R2 |
| 2 | 0.8pF +-5% | beaLib:C_0201_JLC | C8, C9 |
| 2 | 100nf | beaLib:C_0201_JLC | C1i1, C2i1 |
| 2 | 100r | beaLib:R_0201_JLC | R2C1, R2C4 |
| 2 | 12pF | beaLib:C_0201_JLC | C1, C2 |
| 2 | 20k | beaLib:R_0201_JLC | R1C1, R1R2 |
| 2 | 3.3M | beaLib:R_0201_JLC | R2D1, R2D2 |
| 2 | 300r | beaLib:R_0201_JLC | R2C2, R2C3 |
| 2 | 5.6M | beaLib:R_0201_JLC | R1D1, R1D2 |
| 1 | 1.2pF +-5% | beaLib:C_0201_JLC | C4 |
| 1 | 100pF | beaLib:C_0201_JLC | C10 |
| 1 | 10nf | beaLib:C_0201_JLC | C2R2 |
| 1 | 1TS026A-1100-0550-CT | easyeda2kicad:SW-SMD_4P-L2.6-W1.6-P0.75-LS3.0 | SW1 |
| 1 | 1pF +-5% NP0 | beaLib:C_0201_JLC | C3 |
| 1 | 2.2nH +-5% HF | easyeda2kicad:L0201-RD | L2 |
| 1 | 4.7nH +-5% HF | easyeda2kicad:L0201-RD | L1 |
| 1 | 47pF | beaLib:C_0201_JLC | C1n4 |
| 1 | 6.8pF +-5% | beaLib:C_0201_JLC | C14 |
| 1 | ANT162442ST-1000AM1 | Ezeda2kicad:ANT-SMD_6P-L1.6-W0.8-L | U1 |
| 1 | B+ | justPads_custom:2_3-1.5_2.5_1_1 | B+1 |
| 1 | B- | justPads_custom:2_3-1.5_2.5_1_1 | B-1 |
| 1 | EA8103 | easyeda2kicad:DFN-6_L1.5-W1.5-P0.50-BL-EP1.0 | U7 |
| 1 | GT-TC020B-H035-L05 | easyeda2kicad:SW-SMD_GT-TC020B-H035-L05 | S1 |
| 1 | ICM-45686 | imu_custom:IMU | U3 |
| 1 | IST8306 | mag_custom:IST8306 | U4 |
| 1 | LGS4056HDA | easyeda2kicad:DFN-8_L2.0-W2.0-P0.50-TL-EP1.6 | U6 |
| 1 | LOGO | LOGO | G*** |
| 1 | LQM18FN1R0M00D | easyeda2kicad:L0603 | L3 |
| 1 | MHPA0808RGBDT | easyeda2kicad:LED-ARRAY-SMD_4P-L0.80-W0.80-BR | T1 |
| 1 | NRF52833-QDAA-R | ezeda2kicad:QFN-40_L5.0-W5.0-P0.40-TL-EP3.6 | U2 |
| 1 | SSP7615-33DFR | easyeda2kicad:DFN-4_L1.0-W1.0-P0.65-BL-EP | U5 |
| 1 | SX2M32.768KM20F30TNN | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | X2 |
| 1 | TPD3E001DRYR-TP | easyeda2kicad:SON-6_L1.5-W1.0-P0.50-BL_SN74LVC1G19DRYR | D1 |
| 1 | TYPE-C 16P CB0.8 073 | easyeda2kicad:USB-C-SMD_TYPE-C-16P-CB0.8-073 | USB1 |
| 1 | XL4EL89CKI-111YLC-32M | Ezeda2kicad:CRYSTAL-SMD_4P-L1.6-W1.2-BL | X1 |
| 1 | ~ | beaLib:Paw-Connect_RevB_TC2030-IDC-NL_2x03_P1.27mm_Vertical | TP1 |
The 61 most common of 62 parts.
Questions
How big is the Fuimini V2 PCB?
It measures 15 × 29.2 mm and has 4 copper layers, 1 mm thick.
What parts does the Fuimini V2 use?
62 parts, built around the NRF52833-QDAA-R, EA8103T5R, ANT162442ST-1000AM1 and ICM-45686. 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 Fuimini V2 KiCad files?
From the Zipra1/Fuimini-V2 repository on GitHub, at the commit this page was made from: the board is KiCad/Fuimini-V2.kicad_pcb and its schematic KiCad - LSM6DSV/Fuimini-V2-LSM6DSV.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fuimini V2 design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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