4 layers6.8 × 6.8 mm
4 layers
SmartWatch
SimonBrenninger/smartWatch1a simple, Zephyr-powerd wristwatch
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 112
- Nets
- 100
- Pads
- 401
- Tracks, vias
- 1,162, 177
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 29 Aug 2022
- Updated
- 16 Feb 2025
Overview
SmartWatch is an open-source printed circuit board by SimonBrenninger, from the SimonBrenninger/smartWatch repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board with 112 parts on 100 nets, routed with 1,162 tracks and 177 vias.
It is built around the ISL9110IRT7Z-T7A, PCA9957HNMP and AP9101CAK6-ABTRG1, with the BQ25606RGET, MXC4005XC and SP0503BAHTG among its other parts. Its parts include 27 resistors, 22 capacitors, 7 crystals, 5 inductors and 3 switches. It belongs with the wearables boards and the nRF52 and nRF5x boards of this library.
Main components
7
ISL9110IRT7Z-T7A
TDFN-12-EP(3x3)1 1.2A 1.8V~5.5V 2.5MHz 5V Buck-Boost Buck-Boost Built-in Yes TDFN-12-EP(3x3) DC-DC Converters ROHSRenesas ElectronicsDC-DC Converters
PCA9957HNMP
VQFN-40-EP(5x5)-40℃~+85℃ 2.7V~5.5V 31.25kHz 32mA 6.5% Over-Temperature Protection (OTP)、Open-Circuit Protection、Short-Circuit Protection PWM VQFN-40-EP(5x5) LED Drivers ROHSNXP SemiconductorsLED Drivers
AP9101CAK6-ABTRG1
SOT-26-40℃~+85℃ 1 1.5V~5.5V 10nA 2.5V 4.425V Lithium Battery Not supported Overcharge protection、Over-discharge protection、Overcurrent Protection、Short-Circuit Protection、Overvoltage Protection Protection IC Support SOT-26 Battery Management ROHSDiodes IncorporatedBattery Management
BQ25606RGET
VQFN-24(4x4)-40℃~+85℃ 1 3.9V~13.5V 3A 4.352V 58uA Charging IC Lithium Battery Support Support VQFN-24(4x4) Battery Management ROHSTexas InstrumentsBattery Management
MXC4005XC
WLP-6(1.2x1.7)-40℃~+85℃ 1.62V~3.6V 12bit 1uA Accelerometer I2C X,Y,Z ±8g 运动事件检测 WLP-6(1.2x1.7) Accelerometers ROHSMEMSICAccelerometers
SP0503BAHTG
SOT-143-55℃~+125℃ 10A@8/20us 14V 150W@8/20us 30pF、60pF 5.5V 6V 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)SSM6N68NU,LF
UDFN-6(2x2)MOSFETsToshiba
README
README.mdsmartWatch
is a simple, digital wristwatch that uses LEDs to indicate the position of each clock arm.
Smart Features
The smartWatch incorporates an nRF52810 for handling BLE connectivity to send the monitored data regularly to the host device.
PCB Design
The PCB was designed using KiCad.
PCB front-side
PCB back-side
Future Features
A future revision will include a biomedical sensor to enable even more smart functionalities i.e. SpO2 and heart-rate measurements.
Parts
112| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | green | LED green:LEDM2012X80N | V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24, V25 +8 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R6, R7, R8, R9, R16, R17, R18, R24 |
| 5 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C11, C12, C16, C21 |
| 5 | 10u | Capacitor_SMD:C_0603_1608Metric | C3, C4, C6, C7, C8 |
| 4 | 12p | Capacitor_SMD:C_0603_1608Metric | C9, C14, C17, C19 |
| 3 | 4k7 | Resistor_SMD:R_0603_1608Metric | R14, R15, R23 |
| 3 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C2, C10, C20 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C5, C13 |
| 2 | 2k7 | Resistor_SMD:R_0603_1608Metric | R3, R25 |
| 2 | 5k11 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | Gnd | TestPoint:TestPoint_Pad_D1.0mm | TP2, TP6 |
| 1 | 0.8p | Capacitor_SMD:C_0603_1608Metric | C18 |
| 1 | 0R | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 100p | Capacitor_SMD:C_0603_1608Metric | C15 |
| 1 | 10u | Inductor_SMD:L_0603_1608Metric | L4 |
| 1 | 15n | Inductor_SMD:L_0603_1608Metric | L3 |
| 1 | 1Meg | Resistor_SMD:R_0603_1608Metric | R26 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 1u | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R22 |
| 1 | 2u2 | Inductor_SMD:L_1008_2520Metric | L2 |
| 1 | 3.3V | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | 30k | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 32.768k | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 324k | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 32MHz | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1 |
| 1 | 330R | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | 330R | Resistor_SMD:R_2512_6332Metric | R4 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R19 |
| 1 | 3n9 | Inductor_SMD:L_0603_1608Metric | L5 |
| 1 | 56p | Capacitor_SMD:C_0603_1608Metric | C22 |
| 1 | 5k1 | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | 820R | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | AP9101CAK6-ABTRG1 | Protection:SOT95P285X140-6N | V1 |
| 1 | Antenna_Chip | myLib:Ignion_NN01-102_BT_WIFI | AE1 |
| 1 | BAT+ | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | BAT- | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | BQ25606RGET | Charger:QFN50P400X400X100-25N | V5 |
| 1 | BTN0 | myLib:Tactile_Panasonic_EVQP7J01P | S2 |
| 1 | BTN1 | myLib:Tactile_Panasonic_EVQP7J01P | S3 |
| 1 | Bat-Conn | Connector_JST:JST_PH_B2B-PH-SM4-TB_1x02-1MP_P2.00mm_Vertical | X2 |
| 1 | CHRG_STAT | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | DBG_LED | LED red:LEDC1608X80N | V7 |
| 1 | DCDC-PG | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | FerriteBead_Small | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | Fuse_1A | Fuse:Fuse_0603_1608Metric_Pad1.05x0.95mm_HandSolder | F1 |
| 1 | ISL9110IRT7Z-T7A | DC-DC:SON40P300X300X75-13N | V4 |
| 1 | MXC4005XC | Gyroscope:MXC4005XC | V32 |
| 1 | NTC | myLib:PinHeader_P2mm_1x02_SMD | X3 |
| 1 | PCA9957HNMP | Package_DFN_QFN:QFN-40-1EP_5x5mm_P0.4mm_EP3.6x3.6mm | V33 |
| 1 | PHOTO | TestPoint:TestPoint_Pad_D1.0mm | TP11 |
| 1 | SFH 3710 | Phototransistor:LEDC2012X95N | V34 |
| 1 | SP0503BAHTG | ESD:SP0503BAHTG | V3 |
| 1 | SSM6N68NU,LF | Mosfet:SSM6N68NULF | V2 |
| 1 | SWD | myLib:PinHeader_2x05_P1.27mm_Vertical_SMD | X5 |
| 1 | UART | myLib:PinHeader_2x03_P1.27mm_Vertical_SMD | X4 |
| 1 | USB_C_Receptacle_USB2.0 | myLib:USB_C_Receptacle_Amphenol_12401598 | X1 |
| 1 | VBUS | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | nRF52810-QCxx | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.6x3.6mm | V6 |
| 1 | nRST | myLib:SW_SPST_EVQP2 | S1 |
| 1 | ~{CHRG_PG} | TestPoint:TestPoint_Pad_D1.0mm | TP10 |
| 1 | ~{DCDC-BAT} | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
Questions
What parts does the SmartWatch use?
112 parts, built around the ISL9110IRT7Z-T7A, PCA9957HNMP, AP9101CAK6-ABTRG1 and BQ25606RGET. 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 SmartWatch KiCad files?
From the SimonBrenninger/smartWatch repository on GitHub, at the commit this page was made from: the board is pcb/pcb.kicad_pcb and its schematic hvqfn_adapter/hvqfn_adapter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SmartWatch design in my own project?
Its repository publishes it under the GPL-3.0 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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