2 layers307.3 × 148.3 mm
4 layers89.9 × 88.8 mm
Bigboard
mincrmatt12/MWatchpebble-style smartwatch os&hardware
- Size
- 89.9 × 88.8 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 110
- Nets
- 166
- Pads
- 653
- Tracks, vias
- 1,310, 236
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 23 Aug 2023
- Updated
- 31 Oct 2023
Overview
Bigboard is an open-source printed circuit board by mincrmatt12, from the mincrmatt12/MWatch repository on GitHub. It is a 4-layer board of 89.9 × 88.8 mm with 110 parts on 166 nets, routed with 1,310 tracks and 236 vias.
It is built around the SC0914(7), APDS-9306-065 and BMM150, with the GD25LQ128DSIGR, SN74LVC8T245PWRE4 and BMI270 among its other parts. Its parts include 43 capacitors, 16 resistors, 11 ICs, 11 connectors and 8 diodes. It belongs with the RP2040 boards of this library.
Main components
12
SC0914(7)
QFN-56(7x7)-40℃~+85℃@(TC) 1.8V~3.3V 12bit 133MHz 264KB 30 32 Bit ARM Cortex-M0+ Built-in+External External QFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
APDS-9306-065
UDFN-6(2x2)-40℃~+85℃ 0.65mm 1.7V~3.6V 20bit 2mm 2mm I2C Light Intensity UDFN-6(2x2) Ambient Light Sensors ROHSBroadcom LimitedAmbient Light Sensors
BMM150
WLCSP-12(1.6x1.6)-40℃~+85℃ 1.62V~3.6V I2C、SPI ±1.3mT ±2.5mT WLCSP-12(1.6x1.6) 3D Magnetic Sensors ROHSBosch3D Magnetic Sensors
GD25LQ128DSIGR
SOP-8-208mil-40℃~+85℃ 1.65V~2V 100,000 cycles 120MHz 128Mbit 20 Years 35uA 500us SPI SOP-8-208mil NOR FLASH ROHSGigaDevice Semicon BeijingNOR FLASH
SN74LVC8T245PWRE4
TSSOP-24-40℃~+85℃ 1 8 Level translator Power-off protection、Output enable high-impedance Tri-State TSSOP-24 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
BMI270
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 3.5uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometersMAX20353AEWN+
WLP-56(3.68x4.18)Dynamic voltage regulation、Overcurrent Protection、Adjustable current limiting、Power-on timing control WLP-56(3.68x4.18) Power Management - Specialized ROHSMaxim Integrated (Analog Devices)Power Management Specialized - PMIC
PCF85263AT/AJ
SO-8-40℃~+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 SO-8 Real Time Clocks ROHSNXP SemiconductorsReal Time Clocks
TXB0104D
SOIC-14-40℃~+85℃ 1 1.2V~3.6V 1.65V~5.5V 100Mbps 4 Auto Direction Detection Bidirectional CMOS CMOS Tri-State SOIC-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
CC0201KRX5R8BB104
0201100nF 25V X5R ±10% 0201 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
B3F-1020
插件-4P,6x6mm-25℃~+70℃ 50mA 5mm 6mm 6mm 98gf Black PC Pin Round Button SPST Through Hole Without Bracket 插件-4P,6x6mm Tactile Switches ROHSOmronTactile SwitchesCC0201MRX5R6BB105
020110V 1uF X5R ±20% 0201 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
README
README.mdMWatch
Parts
110| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 100nF | Capacitor_SMD:C_0201_0603Metric | C2, C11, C16, C19, C20, C22, C23, C24, C25, C26, C27, C28, C29, C32, C33, C34 +10 |
| 9 | 10k | Resistor_SMD:R_0201_0603Metric | R1, R2, R3, R11, R12, R13, R14, R15, R16 |
| 8 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 |
| 7 | 1uF | Capacitor_SMD:C_0201_0603Metric | C3, C5, C12, C21, C30, C31, C37 |
| 5 | 10uF | Capacitor_SMD:C_0603_1608Metric | C9, C10, C13, C14, C15 |
| 5 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2, J3, J4, J5, J10 |
| 5 | TestPoint | TestPoint:TestPoint_Pad_D2.5mm | TP1, TP2, TP3, TP4, TP5 |
| 4 | D | Diode_SMD:D_SOD-323 | D2, D3, D7, D8 |
| 3 | LED | LED_SMD:LED_0603_1608Metric | D4, D5, D6 |
| 2 | 120pF | Capacitor_SMD:C_0201_0603Metric | C40, C41 |
| 2 | 1k | Resistor_SMD:R_0201_0603Metric | R7, R8 |
| 2 | 2.2uH | Inductor_SMD:L_0805_2012Metric | L2, L3 |
| 2 | 27 | Resistor_SMD:R_0201_0603Metric | R9, R10 |
| 2 | 27pF | Capacitor_SMD:C_0201_0603Metric | C17, C18 |
| 2 | 5.1k | Resistor_SMD:R_0201_0603Metric | R4, R5 |
| 2 | SN74LVC8T245PWR | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U4, U5 |
| 1 | 12MHz | Crystal:Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 4.02k | Resistor_SMD:R_0201_0603Metric | R6 |
| 1 | 4.7uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | APDS-9306-065 | OptoDevice:Broadcom_DFN-6_2x2mm_P0.65mm | U9 |
| 1 | Antenna_Loop | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-2_1x02_P2.54mm_Horizontal | AE1 |
| 1 | BMI270 | Package_LGA:Bosch_LGA-14_3x2.5mm_P0.5mm | U8 |
| 1 | BMM150 | Package_CSP:WLCSP-12_1.56x1.56mm_P0.4mm | U7 |
| 1 | Battery_Cell | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | BT1 |
| 1 | Conn_01x02_Male | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | Conn_01x05_Male | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J7 |
| 1 | Conn_02x03_Row_Letter_First | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J8 |
| 1 | Conn_02x07_Row_Letter_First | Connector_PinHeader_2.54mm:PinHeader_2x07_P2.54mm_Vertical | J11 |
| 1 | Conn_2Rows-21Pins_MountingPin | displaymolex:5035662102 | J6 |
| 1 | D52MxxM8 | RF_Module:Garmin_M8-35_9.8x14.0mm_Layout6x6_P1.5mm | U2 |
| 1 | GD25LQ128DSIGR | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U6 |
| 1 | MAX20353AEWN+ | max20353:MAX20353AEWN&plus_ | U1 |
| 1 | Motor_AC | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-2_1x02_P2.54mm_Horizontal | M1 |
| 1 | PCF85263AT/AJ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U11 |
| 1 | RP2040 | rp2040:RP2040-QFN-56 | U3 |
| 1 | SP0502BAHTG | Package_TO_SOT_SMD:SOT-23 | D1 |
| 1 | TXB0104D | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U10 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J1 |
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Questions
How big is the Bigboard PCB?
It measures 89.9 × 88.8 mm and has 4 copper layers, 1 mm thick.
What parts does the Bigboard use?
110 parts, built around the SC0914(7), APDS-9306-065, BMM150 and GD25LQ128DSIGR. 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 Bigboard KiCad files?
From the mincrmatt12/MWatch repository on GitHub, at the commit this page was made from: the board is board/bigboard/bigboard.kicad_pcb and its schematic board/bigboard/ambientlight.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bigboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask mincrmatt12 before reusing the design.