4 layers101.6 × 26.9 mm
4 layers101.6 × 26.9 mm
Liaka V3
LulaUAV/Laika-Flight-Computer2Kicad files for the Laika flight computer
- Size
- 101.6 × 26.9 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 81
- Nets
- 105
- Pads
- 353
- Tracks, vias
- 910, 133
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 7 Mar 2024
- Updated
- 3 Apr 2023
Overview
Liaka V3 is an open-source printed circuit board by LulaUAV, from the LulaUAV/Laika-Flight-Computer repository on GitHub. It is a 4-layer board of 101.6 × 26.9 mm with 81 parts on 105 nets, routed with 910 tracks and 133 vias.
It is built around the CP2102N-A01-GQFN28R, ESP32-WROOM-32 and L80-M39, with the MS561101BA03-50, XTSD04GLGEAG and THD2528-11SD-GF among its other parts. Its parts include 21 resistors, 19 capacitors, 11 ICs, 7 diodes and 6 transistors. It belongs with the ESP32 boards of this library.
Main components
12
CP2102N-A01-GQFN28R
QFN-28-EP(5x5)-40℃~+85℃ 13.7mA 195uA 3Mbps 3V~3.6V Transceiver USB 2.0 QFN-28-EP(5x5) USB Converters ROHSSilicon LabsUSB Converters
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
L80-M39
SMD,16x16Hot start acceleration、RTC backup power、Short-circuit detection SMD,16x16 GNSS Modules ROHSQuectelGNSS Modules
MS561101BA03-50
QFN-8(3x5)-40℃~+85℃ 1.8V~3.6V 140nA 150pa 1Kpa~1.2bar 8.22ms I2C、SPI Integrated ADC and digital interface、On-chip calibration and non-volatile storage、Standby mode、On-chip temperature output Yes QFN-8(3x5) Pressure Sensors ROHSTE ConnectivityPressure Sensors
XTSD04GLGEAG
LGA-8(6x8)-30℃~+85℃ 2.7V~3.6V 200uA 4Gbit 50MHz SPI LGA-8(6x8) NAND FLASH ROHSXTXNAND FLASH
THD2528-11SD-GF
SMD2mm Connector and Ejector MicroSD Card (TF Card) No Push-Push SMD SD Card / Memory Card Connector ROHSTHDSD Card / Memory Card Connector
ADXL375BCCZ-RL7
LGA-14(3x5)-40℃~+85℃ 100nA 16bit 2V~3.6V Accelerometer SPI、I2C X,Y,Z ±200g LGA-14(3x5) Accelerometers ROHSAnalog DevicesAccelerometers
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BMX055
LGA-20(3x4.5)-40℃~+85℃ 12bit、16bit 2.4V~3.6V 62uA IMU (accelerometer + gyroscope) Motion event detection SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-20(3x4.5) Accelerometers ROHSBosch SensortecAccelerometers
LM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparators
RFM95W-915S2
LCC-16_16X16mmLCC-16_16X16mm New Arrivals ROHSHopeRF Micro-electronicsUncategorised
B5819W
SOD-123-55℃~+125℃ 1.5A 1mA@40V 25A 40V 600mV@1A Standalone SOD-123 Schottky Diodes ROHSMDDSchottky Diodes
README
V2/README.mdLiaka-Flight-Computer
Kicad PCB files for the Liaka flight computer
PCB Ordering Information:
Export the PCB files as Gerber. See online tutorial for details. Upload drill files, gerber files, BOM and .pos file to JLCPCB for PCB manufacture and assembly. JLC can assemble most of the components other than RFM95W, GPS, Baro and various other minor parts. I highly reccomend to have JLC assemble the ESP32 chip for you.
For code to run on the board, see my rocket-software repository.
Errata List:
- PWR and GND for XT-30 connector are reversed.
- Round edges of PCB to minimise stress concentrations.
Areas for improvement:
- MPU6050 locks out after 15g. Consider higher range accelerometer.
- Consider the use of a flash chip rather than a micro SD card.
Parts
81| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C4, C13, C16, C18, C19 |
| 5 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R6, R13, R14, R18 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric | R5, R8, R9, R20 |
| 4 | 10uF | Capacitor_SMD:C_0603_1608Metric | C3, C5, C9, C14 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO14580_Pad_TopOnly | H1, H2, H3, H4 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R12, R15, R21 |
| 3 | B5819W | Diode_SMD:D_SOD-123 | D2, D3, D4 |
| 3 | Si2301CDS | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C7, C10 |
| 2 | 100uF | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B | C8, C15 |
| 2 | 12k | Resistor_SMD:R_0603_1608Metric | R10, R11 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C11, C12 |
| 2 | 2.4k | Resistor_SMD:R_0603_1608Metric | R16, R17 |
| 2 | MMBT2222 | Package_TO_SOT_SMD:SOT-23 | Q4, Q5 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 2-3S_LiPo_LARGE_HOLE_XT-30 | Connector_AMASS:AMASS_XT30PW-M_1x02_P2.50mm_Horizontal | J2 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q6 |
| 1 | 300k | Resistor_SMD:R_0603_1608Metric | R19 |
| 1 | 3M | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | 5.1M | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 56k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | ADR5040ARTZ-2.048 | Local_footprints:Analog_Devices-ADR5040ARTZ-REEL7-Level_C | U6 |
| 1 | ADXL375BCCZ-RL7 | Local_footprints:ADXL375BCCZ-RL7 | U3 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U7 |
| 1 | BAT54C | Package_TO_SOT_SMD:SOT-23 | D7 |
| 1 | BMX055 | Local_footprints:BMX055 | U10 |
| 1 | BOOT | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KSC6xxJ | SW3 |
| 1 | CP2102N-A01-GQFN28 | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm | U8 |
| 1 | Conn_Coaxial | Connector_Coaxial:SMA_Amphenol_132291_Vertical | J1 |
| 1 | ERROR_STATUS_LED | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U9 |
| 1 | HPR_Logo | Local_footprints:HPR_Logo | H5 |
| 1 | I2C_Interface_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | L80-M39 | Local_footprints:L80-M39 | U1 |
| 1 | LED_BLUE | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | LED_RED | LED_SMD:LED_0603_1608Metric | D6 |
| 1 | LM393 | Local_footprints:LM393DR2G | U5 |
| 1 | Liaka_Text | Local_footprints:Liaka_Text | H6 |
| 1 | MS561101BA03-50 | Local_footprints:MS561101BA03-50 | U2 |
| 1 | MS621FE-FL11E | Local_footprints:BAT_MS621FE-FL11E | BT1 |
| 1 | NC | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | RFM95W-915S2 | RF_Module:HOPERF_RFM9XW_SMD | U4 |
| 1 | RRC3_In | Connector_JST:JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J3 |
| 1 | RST | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KSC6xxJ | SW2 |
| 1 | SD_DUMP | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KSC6xxJ | SW4 |
| 1 | SMT-1127-S-R | Local_footprints:XDCR_SMT-1127-S-R | LS1 |
| 1 | THD2528-11SD-GF | Local_footprints:THD252811SDGF | J7 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J5 |
| 1 | XTSD04GLGEAG | Local_footprints:SON127P800X600X95-8N | IC1 |
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Questions
How big is the Liaka V3 PCB?
It measures 101.6 × 26.9 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Liaka V3 use?
81 parts, built around the CP2102N-A01-GQFN28R, ESP32-WROOM-32, L80-M39 and MS561101BA03-50. 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 Liaka V3 KiCad files?
From the LulaUAV/Laika-Flight-Computer repository on GitHub, at the commit this page was made from: the board is V3/Liaka_V3.kicad_pcb and its schematic V3/DataLogging.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Liaka V3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask LulaUAV before reusing the design.