4 layers45 × 81 mm
RAM R2
nimishcoder1232/Bedroom-Engineering-Propulsive-Landing-Project
This repo has everything that I made for my rocket that can propulsive landing, while still being under ITAR restrictions.
78 parts
2 layers48 × 78 mm
Sigma1
InSynchronous/mango2An ESP32-S3 based flight computer with an external flash, imu, barometer, magnetometer, 4 servo ports, and 4 pyrotechnic channels with MOSFETs. Designed for Aerospace applications.
- Size
- 48 × 78 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 62
- Nets
- 60
- Pads
- 260
- Tracks, vias
- 816, 67
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 Dec 2025
- Updated
- 25 Jan 2026
Overview
Sigma1 is an open-source printed circuit board by InSynchronous, from the InSynchronous/mango repository on GitHub, published under the MIT licence. It is a 2-layer board of 48 × 78 mm with 62 parts on 60 nets, routed with 816 tracks and 67 vias.
It is built around the ESP32-S3-WROOM-1-N8, MLX90395KDC-BBA-001-SP and TPS565208DDC, with the W25Q16JVSSIQ, ICM-42688-P and IRLML6402 among its other parts. Its parts include 19 capacitors, 13 resistors, 11 connectors, 7 ICs and 4 transistors. It belongs with the ESP32 boards of this library.
Main components
7
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MLX90395KDC-BBA-001-SP
SOIC-8-40℃~+125℃ 16bit 2.3mA 2.6V~3.6V I2C、SPI ±130mT ±50mT SOIC-8 3D Magnetic Sensors ROHSMelexisLinear Hall Sensors
TPS565208DDC
TSOT-23-6-40℃~+125℃@(TJ) 1 4.5V~17V 500kHz 5A 760mV~7V Adjustable Buck Buck Built-in Yes TSOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
W25Q16JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 10uA 133MHz 16Mbit 2.7V~3.6V 20 Years 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
ICM-42688-P
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 7.5uA IMU (accelerometer + gyroscope) SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps Motion Event Detection, Synchronization, Timestamp Support LGA-14(2.5x3) Accelerometers ROHSTDK InvenSenseAccelerometers
IRLML6402
SOT-23-55℃~+150℃ 1 P-Channel 1.3W 110pF 12nC 145pF 20V 3.7A 400mV 633pF 65mΩ@4.5V P-Channel SOT-23 MOSFETs ROHSGuangdong HottechMOSFETs
OV-7604-C7-32.768KHZ-20PPM-TB-QA
SMD3215-4P-40℃~+125℃ 1.6V~5.5V 32.768kHz 500nA ±20ppm ±20ppm SMD3215-4P Crystal Oscillators ROHSMicro CrystalCrystal Oscillators
README
README.mdMANGO
An ESP32-S3 based flight computer with an external flash, imu, barometer, magnetometer, 4 servo ports, and 4 pyrotechnic channels with MOSFETs. Designed for Aerospace applications.
Key Features
- Dual core Xtensa microcontroller
- 4 Servo Outputs
- 4 High current mosfet switches for pyrotechnic channels
- External 16 MB flash for flight logging
- IMU, Magnetometer, and Barometer for orientation and state estimation
- External expansion header with space for an I2C bus, 4 extra GPIO pins, and 2 pairs of power
Schematic
PCB
Parts
62| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100n | Capacitor_SMD:C_0603_1608Metric | C6, C7, C10, C11, C12 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R2, R7, R9, R11, R13 |
| 4 | 0.1µF | Capacitor_SMD:C_0603_1608Metric | C3, C4, C15, C18 |
| 4 | 100 | Resistor_SMD:R_0603_1608Metric | R6, R8, R10, R12 |
| 4 | 10µF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C13, C14 |
| 4 | IRLML6402 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_Xinya_XY308-2.54-2P_1x02_P2.54mm_Horizontal | J2, J9, J10, J11 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R5 |
| 2 | 22µF | Capacitor_SMD:C_0603_1608Metric | C16, C17 |
| 2 | SW_Push | TL3365AF180QG:SW_TL3365AF180QG | SW1, SW2 |
| 2 | Servo 1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3, J6 |
| 1 | 0.1μF | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 10uf | Capacitor_SMD:C_0603_1608Metric | C19 |
| 1 | 2u2 | Capacitor_SMD:C_0603_1608Metric | C8 |
| 1 | 3.3uh | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 54.9k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4 |
| 1 | BMP390_C5124834 | easyeda2kicad:LGA-10_L2.0-W2.0-P0.50-BL | U5 |
| 1 | Conn_01x02 | Connector_AMASS:AMASS_XT30U-F_1x02_P5.0mm_Vertical | J1 |
| 1 | Conn_01x10 | Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical | J8 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U1 |
| 1 | ICM-42688-P | ICM:PQFN50P300X250X97-14N | U3 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | MLX90395KDC-BBA-001-SP | MLX90395KDC-BBA-101-SP:SOIC127P600X172-8N | U7 |
| 1 | OV-7604-C7-32.768KHZ-20PPM-TB-QA | OV7604C7:OSC_OV-7604-C7-32.768KHZ-20PPM-TB-QA | Y1 |
| 1 | Servo 2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | Servo 3 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | TPS565208 | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | USB_C_Plug_USB2.0 | Connector_USB:USB_C_Receptacle_Amphenol_124019772112A | P1 |
| 1 | W25Q16JVSS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U8 |
Questions
How big is the Sigma1 PCB?
It measures 48 × 78 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sigma1 use?
62 parts, built around the ESP32-S3-WROOM-1-N8, MLX90395KDC-BBA-001-SP, TPS565208DDC and W25Q16JVSSIQ. 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 Sigma1 KiCad files?
From the InSynchronous/mango repository on GitHub, at the commit this page was made from: the board is pcb/Sigma1.kicad_pcb and its schematic pcb/Sigma1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sigma1 design in my own project?
Its repository publishes it under the MIT 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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