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4 layers100 × 56 mmSmallKat v2, the printed circuit board in 3D

SmallKat v2

keionbis/SmallKat_CM4
Open in PCBKitView on GitHub.kicad_pcb
Size
100 × 56 mm
Copper layers
4
Thickness
4.48 mm
Parts
167
Nets
272
Pads
862
Tracks, vias
48, 6
Pours
1
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
18 Oct 2021
Updated
18 Oct 2021

Overview

SmallKat v2 is an open-source printed circuit board by keionbis, from the keionbis/SmallKat_CM4 repository on GitHub. It is a 4-layer board of 100 × 56 mm with 167 parts on 272 nets, routed with 48 tracks and 6 vias.

It is built around the STM32G474CEU6, 74LVC1G07 and PCA9685BS, with the BNO055 among its other parts. Its parts include 47 resistors, 36 capacitors, 30 connectors, 14 diodes and 9 ICs. It belongs with the STM32 and Raspberry Pi (Linux) boards of this library.

Main components

4

README

README.md

Esp32-Motherboard

Pins

PinUse
0Boot
1TX
2SD_DATA0
3RX
4SD_DATA1
5AD_SERVO_1
12SD_DATA2
13SD_DATA3
14SD_CLK
15SD_CMD
16AD_SERVO_2
17AD_SERVO_3
18EN_SERVO_DRIVER
19AD_SERVO_4
21SDA
22SCL
23LED
25BATT_VOLTAGE_ADC
266_VOLT_ADC
27SCL_1
32SDA_1
33Fuse5_ADC
34FUSE2_ADC
35FUSE1_ADC
36FUSE3_ADC
39FUSE4_ADC

I2C

  • i2c 1 (SCL 22, SDA 21) - BNO055, QwIIC connector
  • i2c 2 (SCL 27, SDA 32) - PCA9685

Parts

167
QtyValueFootprintReferences
20Conn_01x03_MaleConnector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalJ3, J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23, J24 +4
1410KResistor_SMD:R_0402_1005MetricR2, R4, R7, R10, R14, R17, R19, R20, R24, R27, R30, R33, R45, R46
11CCapacitor_SMD:C_0402_1005MetricC3, C5, C6, C7, C8, C9, C10, C11, C13, C17, C21
11LEDLED_SMD:LED_0603_1608MetricD1, D2, D3, D5, D6, D7, D9, D10, D11, D12, D13
9RResistor_SMD:R_0402_1005MetricR11, R13, R15, R18, R21, R22, R23, R44, R47
68.2KResistor_SMD:R_0402_1005MetricR5, R8, R25, R28, R31, R34
6Qwiic connectorConnector_JST:JST_SH_BM04B-SRSS-TB_1x04-1MP_P1.00mm_VerticalJ1, J2, J26, J27, J28, J29
520KResistor_SMD:R_0402_1005MetricR9, R26, R29, R32, R35
5Fuse01550900M:0154.250DRF1, F2, F3, F4, F5
40.1uFCapacitor_SMD:C_0402_1005MetricC1, C12, C14, C22
4MountingHole_PadMountingHole:MountingHole_3.2mm_M3_Pad_ViaH1, H2, H3, H4
2100kResistor_SMD:R_0402_1005MetricR41, R42
2100uFCapacitor_SMD:C_1210_3225MetricC33, C35
210pFCapacitor_SMD:C_0402_1005MetricC15, C16
210uFCapacitor_SMD:C_1206_3216MetricC30, C32
21uFCapacitor_SMD:C_0402_1005MetricC27, C36
2330RResistor_SMD:R_0402_1005MetricR1, R16
247uFCapacitor_SMD:C_1206_3216MetricC31, C34
2BUK9M17-30EX / BUK7M10-40EPackage_SON:VSON-8_3.3x3.3mm_P0.65mm_NexFETQ2, Q3
2CCapacitor_SMD:C_1206_3216MetricC20, C23
2CCapacitor_SMD:C_0805_2012MetricC18, C19
2D_TVSDiode_SMD:D_SOD-523D8, D14
2SCLTestPoint:TestPoint_Pad_D1.5mmTP3, TP13
2SDATestPoint:TestPoint_Pad_D1.5mmTP2, TP12
2SW_SPSTButton_Switch_SMD:SW_SPST_EVQPE1SW1, SW2
2TestPointTestPoint:TestPoint_Pad_D1.5mmTP5, TP6
11000pFCapacitor_SMD:C_0402_1005MetricC24
1100pFCapacitor_SMD:C_0402_1005MetricC25
110nFCapacitor_SMD:C_0402_1005MetricC26
110uFCapacitor_SMD:C_0805_2012MetricC4
110uHInductor_SMD:L_0805_2012MetricL1
1120KResistor_SMD:R_0402_1005MetricR6
112kResistor_SMD:R_0402_1005MetricR40
11KResistor_SMD:R_0402_1005MetricR43
11uHInductor_SMD:L_Bourns_SRP1245AL3
12.18kResistor_SMD:R_0402_1005MetricR36
12.2uFCapacitor_SMD:C_0805_2012MetricC2
12.4KResistor_SMD:R_0402_1005MetricR3
12.61kResistor_SMD:R_0402_1005MetricR38
120kResistor_SMD:R_0402_1005MetricR37
13.3vTestPoint:TestPoint_Pad_D1.5mmTP4
132.768kHzCrystal:Crystal_SMD_3215-2Pin_3.2x1.5mmY1
133.2Resistor_SMD:R_0402_1005MetricR12
14.22kResistor_SMD:R_0402_1005MetricR39
14.7uFCapacitor_SMD:C_0402_1005MetricC28
1470nFCapacitor_SMD:C_0402_1005MetricC29
16VTestPoint:TestPoint_Pad_D2.5mmTP11
174LVC1G07Package_TO_SOT_SMD:SOT-143U3
1BNO055Package_LGA:LGA-28_5.2x3.8mm_P0.5mmU2
1Batt+TestPoint:TestPoint_Pad_D2.5mmTP9
1Check for lifeTestPoint:TestPoint_Pad_D1.5mmTP1
1ComputeModule4-CM4CM4IO:Raspberry-Pi-4-Compute-ModuleModule1
1Conn_01x02_FemaleDJI_BATTERY_CONN:XT-30_femaleJ25
1Conn_01x22_FemaleXF2J-222412A:XF2J-2224-12AJ8
1Crystal_GND24_SmallCrystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mmY2
1Crystal_SmallCrystal:Crystal_SMD_3215-2Pin_3.2x1.5mmY3
1DIODEDiode_SMD:D_SOD-123FD4
1FSUSB42MXPackage_DFN_QFN:UQFN-10_1.4x1.8mm_P0.4mmU4
1FuseFuse:Fuse_1206_3216MetricF6
1GNDTestPoint:TestPoint_Pad_D2.5mmTP10
1HDMI_A_1.4Connector_HDMI:HDMI_Micro-D_Molex_46765-0x01J30
1ISM330DLCTRISM330DLCTR:PQFN50P250X300X86-14NU5
1LMR14010APackage_TO_SOT_SMD:SOT-23-6IC1
1PCA9685BSPackage_DFN_QFN:QFN-28-1EP_6x6mm_P0.65mm_EP4.25x4.25mmU1
1STM32G474CEU6STM32G4:STM32G474CEU6U6
1TLVM13630TLVM13630:TLVM13630IC2
1TPS40192DRCT-TPS40192DRCTPackage_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mmIC3
1USB_C_ReceptacleC167321:C167321J31

Questions

How big is the SmallKat v2 PCB?

It measures 100 × 56 mm and has 4 copper layers, 4.48 mm thick.

What parts does the SmallKat v2 use?

167 parts, built around the STM32G474CEU6, 74LVC1G07, PCA9685BS and BNO055. 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 keionbis/SmallKat_CM4 repository on GitHub, at the commit this page was made from: the board is SmallKat v2.kicad_pcb. 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 keionbis before reusing the design.

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