4 layers28.7 × 27 mm
Neurband c
jlcjak/neurband
Open, minimal sEMG wristband like the Meta Neural Band: 8-ch ADS1298 + nRF52832 BLE, dry gold electrodes on a flex, 3D-printed band. KiCad, FreeCAD, Zephyr, Python, simulations.
70 parts46
2 layers50 × 30 mm
BleTemp
MrMarble/ble-sensor1A work in progress ble temperature sensor
- Size
- 50 × 30 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 48
- Pads
- 112
- Tracks, vias
- 161, 30
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Aug 2025
- Updated
- 4 Sep 2025
Overview
BleTemp is an open-source printed circuit board by MrMarble, from the MrMarble/ble-sensor repository on GitHub. It is a 2-layer board of 50 × 30 mm with 28 parts on 48 nets, routed with 161 tracks and 30 vias.
It is built around the NRF52832-QFAA-R, HDC1080DMBR and BS-02-A1AJ010, with the SDCL1005C3N9STDF and TS-1088-AR02016 among its other parts. Its parts include 13 capacitors, 2 resistors, 2 crystals, 1 IC and 1 switch. It belongs with the radio and wireless and home automation and IoT boards and the nRF52 and nRF5x boards of this library.
Main components
5
NRF52832-QFAA-R
QFN-48-EP(6x6)-40℃~+85℃ -96dBm 1.7V~3.6V 2.4GHz 2Mbps 4dBm 5.3mA 5.4mA Bluetooth SPI、UART、I2C transceiver QFN-48-EP(6x6) RF Transceiver ICs ROHSNORDICRF Transceiver ICs
HDC1080DMBR
WSON-6(3x3)-40℃~+125℃ 0%RH~100%RH 1.3uA 14bit 2.7V~5.5V I2C ±0.2℃ ±2%RH WSON-6(3x3) Temperature and Humidity Sensor ROHSTexas InstrumentsTemperature And Humidity SensorBS-02-A1AJ010
--25~85℃ Battery base CR2032 Nickel plated Phosphor bronze - ROHSMYOUNGButton And Strip Battery Connector
SDCL1005C3N9STDF
0402200mΩ 3.9nH 300mA 4GHz 8@100MHz Multilayer inductor 0402 Inductors (SMD) ROHSSunlordInductors (SMD)
TS-1088-AR02016
SMD,4x3mm-30℃~+80℃ 1.6N 100,000 cycles 12V 2mm 3.9mm 3mm 50mA Black Round Button SMD(SMT) Tab SPST Surface Mount,Vertical Without Bracket SMD,4x3mm Tactile Switches ROHSXUNPUTactile Switches
README
README.mdBLE Temperature and humidity sensor
⚠️ Work in Progress
I'm still playing around with the layout, it might not work, don't try to use it yet but if you know about electronics feel free to review 😄
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 0u1F | easyeda2kicad:C0402 | C5, C6, C7, C8, C9, C10, C11, C12 |
| 2 | 10k | easyeda2kicad:R0603 | R1, R2 |
| 2 | 12uF | easyeda2kicad:C0402 | C1, C2 |
| 2 | 15pF | easyeda2kicad:C0402 | C3, C4 |
| 1 | 32.768KHz | easyeda2kicad:FC-135R_L3.2-W1.5 | X2 |
| 1 | 32MHz | easyeda2kicad:CRYSTAL-SMD_4P-L3.2-W2.5-BL | X1 |
| 1 | Antenna_Chip | wch-antenna:ANT-F-1-2.4G-1.6MM-FR4-WCH | ANT |
| 1 | BS-02-A1AJ010 | easyeda2kicad:BAT-TH_BS-02-A1AJ010 | B1 |
| 1 | GJM1555C1HR80BB01D | easyeda2kicad:C0402 | C13 |
| 1 | HDC1080DMBR | easyeda2kicad:SENSOR-SMD_HDC1080DMBR | S1 |
| 1 | NRF52832-QFAA-R | easyeda2kicad:QFN-48_L6.0-W6.0-P0.40-BL-EP3.8 | U1 |
| 1 | PZ254V-11-04P_C2691448 | easyeda2kicad:HDR-TH_4P-P2.54-V-M | H1 |
| 1 | SDCL1005C3N9STDF | easyeda2kicad:L0402 | L1 |
| 1 | TS-1088-AR02016 | easyeda2kicad:SW-SMD_L3.9-W3.0-P4.45 | RST |
The 24 most common of 28 parts.
Questions
How big is the BleTemp PCB?
It measures 50 × 30 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BleTemp use?
28 parts, built around the NRF52832-QFAA-R, HDC1080DMBR, BS-02-A1AJ010 and SDCL1005C3N9STDF. 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 BleTemp KiCad files?
From the MrMarble/ble-sensor repository on GitHub, at the commit this page was made from: the board is BleTemp.kicad_pcb and its schematic BleTemp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BleTemp design in my own project?
Its repository states no licence, so its author keeps all rights: ask MrMarble before reusing the design.
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