2 layers29.5 × 24.3 mm
2 layers100 × 56 mm
SmallKat v2
OperationSmallKat/SmallKat-Motherboard2- Size
- 100 × 56 mm
- Copper layers
- 2
- Thickness
- 0.57 mm
- Parts
- 142
- Nets
- 102
- Pads
- 470
- Tracks, vias
- 770, 383
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 9 Nov 2019
- Updated
- 13 Mar 2023
Overview
SmallKat v2 is an open-source printed circuit board by OperationSmallKat, from the OperationSmallKat/SmallKat-Motherboard repository on GitHub. It is a 2-layer board of 100 × 56 mm with 142 parts on 102 nets, routed with 770 tracks and 383 vias.
It is built around the ESP32-S3-MINI-1-N8 and BNO085. Its parts include 41 resistors, 26 capacitors, 23 connectors, 13 diodes and 7 fuses. It belongs with the ESP32 boards of this library.
Main components
2
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
BNO085
LGA-28(3.8x5.2)1.65V~3.6V 12bit、16bit IMU (accelerometer + gyroscope) SPI、I2C、UART X,Y,Z X,Y,Z ±2000dps ±8g LGA-28(3.8x5.2) Accelerometers ROHSCEVAAccelerometers
README
README.mdEsp32-S3 Motherboard
Pins
| Pin | Use |
|---|---|
| 0 | Boot |
| 1 | Servo 15 |
| 2 | Servo 14 |
| 3 | Servo 13 |
| 4 | Servo 12 |
| 5 | Fuse 4 ADC |
| 6 | Fuse 1 ADC |
| 7 | Servo 0 |
| 8 | Servo 1 |
| 9 | Servo 2 |
| 10 | Servo 3 |
| 11 | Fuse 2 ADC |
| 12 | Servo 4 |
| 13 | Servo 5 |
| 14 | Servo 6 |
| 15 | 6V ADC |
| 16 | Batt Voltage ADC |
| 17 | Fuse 3 ADC |
| 18 | Fuse 5 ADC |
| 19 | USB - |
| 20 | USB + |
| 21 | Servo 7 |
| 26 | AD Servo 1 |
| 33 | AD Servo 3 |
| 34 | AD Servo 4 |
| 35 | Batt Serial TX |
| 36 | Heart Beat LED |
| 37 | Servo 8 |
| 38 | Servo 9 |
| 39 | Servo 10 |
| 40 | Servo 11 |
| 41 | SDA |
| 42 | SCL |
| 43 | TX |
| 44 | RX |
| 45 | |
| 46 | |
| 47 | AD Servo 2 |
| 48 | Batt Serial RX |
I2C
- i2c (SCL 42, SDA 41) - BNO055
Serial
- Serial 0: Tx 43, Rx 44
- Serial 1: Tx 35, Rx 48
Parts
142| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3, J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23, J24 +4 |
| 14 | 10K | Resistor_SMD:R_0402_1005Metric | R2, R4, R7, R10, R13, R15, R17, R19, R20, R23, R24, R27, R30, R33 |
| 9 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3, D6, D9, D10, D11, D12, D13 |
| 6 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C3, C12, C14, C18, C22, C23 |
| 6 | 8.2K | Resistor_SMD:R_0402_1005Metric | R5, R8, R25, R28, R31, R34 |
| 5 | 20K | Resistor_SMD:R_0402_1005Metric | R9, R26, R29, R32, R35 |
| 5 | Fuse | 01550900M:0154.250DR | F1, F2, F3, F4, F5 |
| 5 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP5, TP6, TP7, TP14, TP15 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R41, R42 |
| 2 | 100uF | Capacitor_SMD:C_1210_3225Metric | C33, C35 |
| 2 | 10pF | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | 10uF | Capacitor_SMD:C_1206_3216Metric | C30, C32 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C4, C6 |
| 2 | 10uH | Inductor_SMD:L_0805_2012Metric | L1, L2 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C27, C36 |
| 2 | 2.2uF | Capacitor_SMD:C_0805_2012Metric | C2, C5 |
| 2 | 33.2 | Resistor_SMD:R_0402_1005Metric | R11, R12 |
| 2 | 330R | Resistor_SMD:R_0402_1005Metric | R1, R16 |
| 2 | 47uF | Capacitor_SMD:C_1206_3216Metric | C31, C34 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R14, R18 |
| 2 | BUK9M17-30EX / BUK7M10-40E | Package_SON:VSON-8_3.3x3.3mm_P0.65mm_NexFET | Q2, Q3 |
| 2 | DIODE | Diode_SMD:D_SOD-123F | D4, D5 |
| 2 | D_TVS | Diode_SMD:D_SOD-523 | D7, D8 |
| 2 | Fuse | Fuse:Fuse_1206_3216Metric | F6, F7 |
| 2 | LMR14010A | Package_TO_SOT_SMD:SOT-23-6 | IC1, IC2 |
| 2 | LOGO | Smallkat_Logo:logo | G***, G*** |
| 2 | SW_SPST | Button_Switch_SMD:SW_SPST_EVQPE1 | SW1, SW2 |
| 1 | 1000pF | Capacitor_SMD:C_0402_1005Metric | C24 |
| 1 | 100pF | Capacitor_SMD:C_0402_1005Metric | C25 |
| 1 | 10nF | Capacitor_SMD:C_0402_1005Metric | C26 |
| 1 | 120K | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 12k | Resistor_SMD:R_0402_1005Metric | R40 |
| 1 | 1K | Resistor_SMD:R_0402_1005Metric | R43 |
| 1 | 1uH | Inductor_SMD:L_Bourns_SRP1245A | L3 |
| 1 | 2.18k | Resistor_SMD:R_0402_1005Metric | R36 |
| 1 | 2.4K | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 2.61k | Resistor_SMD:R_0402_1005Metric | R38 |
| 1 | 20k | Resistor_SMD:R_0402_1005Metric | R37 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric | C17 |
| 1 | 3.3v | TestPoint:TestPoint_Pad_D2.0mm | TP4 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | Y1 |
| 1 | 4.22k | Resistor_SMD:R_0402_1005Metric | R39 |
| 1 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C28 |
| 1 | 470nF | Capacitor_SMD:C_0402_1005Metric | C29 |
| 1 | 6V | TestPoint:TestPoint_Pad_D2.0mm | TP11 |
| 1 | BATT_SERIAL | Connector_JST:JST_PH_B2B-PH-SM4-TB_1x02-1MP_P2.00mm_Vertical | J1 |
| 1 | BNO085 | BNO085:BNO085 | AC1 |
| 1 | Batt+ | TestPoint:TestPoint_Pad_D2.0mm | TP9 |
| 1 | Check for life | TestPoint:TestPoint_Pad_D2.0mm | TP1 |
| 1 | Conn_01x02_Female | RC-Battery-Connectors:XT-60_male | J25 |
| 1 | ESP32-S3-MINI-1-N8 | ESP32-s3-wroom-mini:ESP32S3MINI1N8 | IC4 |
| 1 | GND | TestPoint:TestPoint_Pad_D2.0mm | TP10 |
| 1 | SCL | TestPoint:TestPoint_Pad_D2.0mm | TP3 |
| 1 | SDA | TestPoint:TestPoint_Pad_D2.0mm | TP2 |
| 1 | TPS40192DRCT-TPS40192DRCT | Package_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mm | IC3 |
| 1 | USB_C_Receptacle | C167321:C167321 | J8 |
The 141 most common of 142 parts.
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Questions
How big is the SmallKat v2 PCB?
It measures 100 × 56 mm and has 2 copper layers, 0.57 mm thick.
What parts does the SmallKat v2 use?
142 parts, built around the ESP32-S3-MINI-1-N8 and BNO085. 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 SmallKat v2 KiCad files?
From the OperationSmallKat/SmallKat-Motherboard repository on GitHub, at the commit this page was made from: the board is SmallKat v2.kicad_pcb and its schematic 3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SmallKat v2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask OperationSmallKat before reusing the design.