2 layers26.6 × 35 mm
2 layers85.6 × 54 mm
Nrf card
dossalab/random-pcbsRandom PCBs I have at my disposal
- Size
- 85.6 × 54 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 64
- Nets
- 78
- Pads
- 305
- Tracks, vias
- 738, 173
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 26 Sep 2024
- Updated
- 26 Jul 2025
Overview
Nrf card is an open-source printed circuit board by dossalab, from the dossalab/random-pcbs repository on GitHub. It is a 2-layer board of 85.6 × 54 mm with 64 parts on 78 nets, routed with 738 tracks and 173 vias.
It is built around the NPM1100-EK, MPU-9250 and PCF85263ATT/AJ, with the BAT54C among its other parts. Its parts include 19 capacitors, 18 resistors, 6 connectors, 4 ICs and 4 diodes. It belongs with the nRF52 and nRF5x boards of this library.
Main components
4NPM1100-EK
-Power Management Sleep wake-up function、Overcurrent Protection、Thermal Protection、Undervoltage Protection、Short-Circuit Protection - Power Management - Specialized ROHSNordic SemiconModules
MPU-9250
QFN-24-EP(3x3)-40℃~+85℃ 2.4V~3.6V 8uA IMU (accelerometer + gyroscope) Motion event detection SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(3x3) Accelerometers ROHSTDK InvenSenseAccelerometers
PCF85263ATT/AJ
TSSOP-8-3.0mm-40℃~+85℃ 0.28uA 280nA 900mV~5.5V Built-in I2C Watchdog timer、Backup power management and battery charging、Timestamp function、Programmable clock output、Alarm function、Periodic interrupt output Yes TSSOP-8-3.0mm Real Time Clocks ROHSNXP SemiconductorsReal Time Clocks
BAT54C
SOT-231 Pair Common Cathode 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-23 Schottky Diodes ROHSNexperiaSchottky Diodes
README
README.mdMy collection of random PCBs (printed-circuit-boards)
These things are too minor to create separate repositories for them.
What's included
| Name | Description | Notes |
|---|---|---|
| ips-display-breakout | Breakout for ST7789-based 240x240 IPS display from Aliexpress | |
| library | Directory containing common footprints & libraries | |
| nrf-card | Development board in a size of a credit card containing NRF52832, SD card breakout, ST7789-based display and more | This was done before I discovered that NRF52 consumes 32 uA of current, so it has external RTC and unnecessary powerup logic. |
| sd-card-debug | SD/MMC card breakout board intended for JTAG debugging on Rockchip / Alwinner boards | Codename "dildo" - never ordered |
Parts
64| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100n | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C6, C8, C9, C10, C13, C18, C19 |
| 4 | 10K | Resistor_SMD:R_0603_1608Metric | R10, R11, R15, R18 |
| 4 | Mounting hole | MountingHole:MountingHole_3.2mm_M3_ISO7380 | H1, H2, H3, H4 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2, C7, C15 |
| 3 | 1K | Resistor_SMD:R_0603_1608Metric | R1, R4, R9 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric | R2, R6 |
| 2 | 100K | Resistor_SMD:R_0603_1608Metric | R3, R5 |
| 2 | 12pf | Capacitor_SMD:C_0603_1608Metric | C16, C17 |
| 2 | 1M | Resistor_SMD:R_0603_1608Metric | R13, R14 |
| 2 | 4.7K | Resistor_SMD:R_0603_1608Metric | R16, R17 |
| 2 | 4k7 | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 1 | .... | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | 0.8pF | Capacitor_SMD:C_0603_1608Metric | C14 |
| 1 | 100pF | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 2.2uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 3.9nH | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | 32768 Hz | Crystal:Crystal_SMD_SeikoEpson_MC146-4Pin_6.7x1.5mm | Y2 |
| 1 | 32MHz | Crystal:Crystal_SMD_EuroQuartz_X22-4Pin_2.5x2.0mm | Y1 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | BAT54C | Package_TO_SOT_SMD:SOT-23 | D4 |
| 1 | Battery | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
| 1 | Boot / Switch | Button_Switch_SMD:SW_SPST_PTS645 | SW1 |
| 1 | Charge | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | Charge error | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | Conn_Coaxial | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J3 |
| 1 | Extension | Connector_PinHeader_2.54mm:PinHeader_1x27_P2.54mm_Vertical | J4 |
| 1 | Input | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | MPU-9250 | Sensor_Motion:InvenSense_QFN-24_3x3mm_P0.4mm | U2 |
| 1 | Micro SD | Connector_Card:microSD_HC_Molex_104031-0811 | J5 |
| 1 | PCF85263ATT | Package_SO:TSSOP-8_3x3mm_P0.65mm | U3 |
| 1 | Q_PMOS_GSD | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ST7789_ALI | st7789-ali:ST7789_ALI | DS1 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J6 |
| 1 | Thumbstick | mini-thumbstick:mini-thumbstick | RV1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Wuerth_629105150521 | J1 |
| 1 | nPM1100 | Package_CSP:ST_WLCSP-25_Die444 | U1 |
| 1 | nRF52832-QFxx | Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.6x4.6mm | U4 |
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Questions
How big is the Nrf card PCB?
It measures 85.6 × 54 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Nrf card use?
64 parts, built around the NPM1100-EK, MPU-9250, PCF85263ATT/AJ and BAT54C. 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 Nrf card KiCad files?
From the dossalab/random-pcbs repository on GitHub, at the commit this page was made from: the board is nrf-card/nrf-card.kicad_pcb and its schematic ips-display-breakout/display-breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Nrf card design in my own project?
Its repository states no licence, so its author keeps all rights: ask dossalab before reusing the design.