2 layers32 × 38 mm
2 layers31.5 × 42 mm
NRF52
edatki/QuectowatchA WIP minimal smartwatch based on the ESP32-C3
- Size
- 31.5 × 42 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 66
- Nets
- 84
- Pads
- 295
- Tracks, vias
- 440, 107
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 17 Dec 2023
- Updated
- 6 Oct 2024
Overview
NRF52 is an open-source printed circuit board by edatki, from the edatki/Quectowatch repository on GitHub. It is a 2-layer board of 31.5 × 42 mm with 66 parts on 84 nets, routed with 440 tracks and 107 vias.
It is built around the W25Q128JVSIQ, DS3231MZ/V+ and LSM6DS3, with the TP4054, AO3401A and 1N5819WS among its other parts. Its parts include 27 capacitors, 13 resistors, 7 ICs, 5 connectors and 3 transistors. It belongs with the wearables and radio and wireless boards and the ESP32, nRF52 and nRF5x and RISC-V boards of this library.
Main components
7
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
DS3231MZ/V+
SOIC-8-40℃~+85℃ 2.3V~5.5V Built-in I2C Temperature compensation、Backup power management and battery charging、Alarm function、Locking and tamper-proof、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
LSM6DS3
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 8KB Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
TP4054
SOT-23-5L-40℃~+85℃ 1 25uA 4.2V 4.2V~6.5V 500mA Charging IC Lithium Battery Not supported 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 SOT-23-5L Battery Management ROHSUMWBattery Management
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 SemiconductorMOSFETs
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky DiodesAO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
Parts
66| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1u | Capacitor_SMD:C_0402_1005Metric | C1, C12, C21, C22, C31, C34, C35, C36, C37 |
| 7 | 10K | Resistor_SMD:R_0402_1005Metric | R3, R4, R6, R7, R8, R14, R15 |
| 5 | 100n | Capacitor_SMD:C_0402_1005Metric | C8, C14, C15, C18, C19 |
| 3 | 100K | Resistor_SMD:R_0402_1005Metric | R5, R10, R11 |
| 3 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C10, C11, C13 |
| 3 | SW_Push | Button_Switch_SMD:Panasonic_EVQPUL_EVQPUC | SW1, SW2, SW3 |
| 2 | 100p | Capacitor_SMD:C_0402_1005Metric | C7, C20 |
| 2 | 12p | Capacitor_SMD:C_0402_1005Metric | C2, C3 |
| 2 | 5K1 | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 6p8 | Capacitor_SMD:C_0402_1005Metric | C16, C17 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1, Q4 |
| 1 | 0p5 | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 0p8 | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 15u | Inductor_SMD:L_0603_1608Metric | L3 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-323 | D1 |
| 1 | 2K2 | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 32.768kHz 6pF ±20ppm | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 32MHz 8pF ±10ppm | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | 47n | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 4n7 | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 820p | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Antenna_PCB | local:Texas_SWRA117D_2.4GHz_Left | AE1 |
| 1 | BAT | local:Battery Pads | J4 |
| 1 | DS3231MZ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | LCD | Connector_FFC-FPC:Molex_54548-1071_1x10-1MP_P0.5mm_Horizontal | J2 |
| 1 | LCD_REFRESH | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | LSM6DS3 | Package_LGA:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U5 |
| 1 | MAX17048 | Package_DFN_QFN:TDFN-8-1EP_2x2mm_P0.5mm_EP0.8x1.2mm | U3 |
| 1 | MOTOR | local:Battery Pads | J5 |
| 1 | PROG | local:Program_Pads | J3 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | TP4054 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J1 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U7 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U4 |
| 1 | nRF52840 | Package_DFN_QFN:Nordic_AQFN-73-1EP_7x7mm_P0.5mm | U1 |
Questions
How big is the NRF52 PCB?
It measures 31.5 × 42 mm and has 2 copper layers, 1.6 mm thick.
What parts does the NRF52 use?
66 parts, built around the W25Q128JVSIQ, DS3231MZ/V+, LSM6DS3 and TP4054. 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 NRF52 KiCad files?
From the edatki/Quectowatch repository on GitHub, at the commit this page was made from: the board is NRF52/Hardware/Hardware.kicad_pcb and its schematic ESP32/Hardware/Hardware.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the NRF52 design in my own project?
Its repository states no licence, so its author keeps all rights: ask edatki before reusing the design.
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