4 layers50 × 50 mm
Fiddlesticks
kushurox/fiddlesticks_pcb
This project is open for learning purposes. Check the LICENSE file for details.
103 partsMIT
4 layers19 × 9.5 mm
Smart Watch
centaurids-hub/Smart-Watch-DesignBaby, I'm back
- Size
- 19 × 9.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 74
- Pads
- 288
- Tracks, vias
- 721, 70
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 May 2026
- Updated
- 27 May 2026
Overview
Smart Watch is an open-source printed circuit board by centaurids-hub, from the centaurids-hub/Smart-Watch-Design repository on GitHub. It is a 4-layer board of 19 × 9.5 mm with 53 parts on 74 nets, routed with 721 tracks and 70 vias.
It is built around the ESP32-S3-MINI-1-N8, TPS63001DRC and BQ24090DGQR, with the DS3231MZ/V+, AO3400A and ICM-42670-P among its other parts. Its parts include 18 capacitors, 14 resistors, 6 diodes, 4 ICs and 4 connectors. It belongs with the wearables boards and the ESP32 boards of this library.
Main components
7
ESP32-S3-MINI-1-N8
SMD-104.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 330mA 3V~3.6V 97mA Bluetooth5.0 ESP32-S3FN8 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD WiFi Modules ROHSEspressif SystemsWiFi Modules
TPS63001DRC
VSON-10-EP(3x3)-40℃~+85℃@(TA) 1 1.5MHz 1.8V~5.5V 3.3V 50uA Buck-Boost Buck-Boost Built-in Fixed Yes VSON-10-EP(3x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BQ24090DGQR
MSOP-10-EP0℃~+125℃ 1 1A 1mA 4.2V 4.45V~6.45V Charging IC Lithium Battery Support Support MSOP-10-EP Battery Management ROHSTexas InstrumentsBattery Management
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
AO3400A
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
ICM-42670-P
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2.25KB 3.5uA IMU (accelerometer + gyroscope) Motion event detection SPI、I2C、I3C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSTDK InvenSenseAccelerometers
PMEG2010AEH
SOD-123F1 Independent 1A 200uA@20V 20V 430mV@1A 9A SOD-123F Schottky Diodes ROHSNexperiaSchottky Diodes
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C5, C11, C13, C14, C15, C17 |
| 5 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2, C4, C6, C7, C8 |
| 4 | 1uF | Capacitor_SMD:C_0603_1608Metric | C3, C9, C10, C12 |
| 3 | 100K | Resistor_SMD:R_0603_1608Metric | R1, R11, R12 |
| 3 | 10K | Resistor_SMD:R_0603_1608Metric | R7, R13, R14 |
| 3 | D_TVS_Filled | Diode_SMD:D_0603_1608Metric | D2, D3, D4 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | BOOT, RST |
| 1 | 0.01uF | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 1K | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 1N5819 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C18 |
| 1 | 2.2uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 220K | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 330 | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 470K | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BQ24090DGQR | Library:IC_XTR111AIDGQR | U3 |
| 1 | CHGLED | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | Conn_01x02_Socket | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J3 |
| 1 | Conn_01x04_Socket | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Conn_01x13_Socket | Connector_FFC-FPC:Hirose_FH12-13S-0.5SH_1x13-1MP_P0.50mm_Horizontal | J1 |
| 1 | DS3231MZ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | ESP32-S3-MINI-1 | RF_Module:ESP32-S2-MINI-1 | U1 |
| 1 | ICM-42670-P | Library:XDCR_ICM-42670-P | MT1 |
| 1 | Motor_DC | Motors:Vybronics_VZ30C1T8219732L | M1 |
| 1 | NTC10K | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | PMEG2010AEH | Diode_SMD:D_SOD-123F | D6 |
| 1 | SW_Push_Dual | Motors:Vybronics_VZ30C1T8219732L | SW3 |
| 1 | TPS63001 | Package_SON:Texas_DRC0010J_ThermalVias | U2 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_Palconn_UTC16-G | J2 |
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Questions
How big is the Smart Watch PCB?
It measures 19 × 9.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Smart Watch use?
53 parts, built around the ESP32-S3-MINI-1-N8, TPS63001DRC, BQ24090DGQR and DS3231MZ/V+. 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 Smart Watch KiCad files?
From the centaurids-hub/Smart-Watch-Design repository on GitHub, at the commit this page was made from: the board is Smart Watch.kicad_pcb and its schematic CONN1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Smart Watch design in my own project?
Its repository states no licence, so its author keeps all rights: ask centaurids-hub before reusing the design.