2 layers72.5 × 61.5 mm
Breakout boards
UMSATS/SRAD-AvionicsComputer
This repository contains the schematic, PCB, and supporting design files for the Student Researched and Designed (SRAD) rocket avionics computer.
54 parts
4 layers76.2 × 152.4 mm
SRAD V2
UMSATS/SRAD-AvionicsComputerThis repository contains the schematic, PCB, and supporting design files for the Student Researched and Designed (SRAD) rocket avionics computer.
- Size
- 76.2 × 152.4 mm
- Copper layers
- 4
- Thickness
- 1.72 mm
- Parts
- 163
- Nets
- 191
- Pads
- 583
- Tracks, vias
- 1,058, 316
- Pours
- 40
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Apr 2025
- Updated
- 22 Oct 2026
Overview
SRAD V2 is an open-source printed circuit board by UMSATS, from the UMSATS/SRAD-AvionicsComputer repository on GitHub. It is a 4-layer board of 76.2 × 152.4 mm with 163 parts on 191 nets, routed with 1,058 tracks and 316 vias.
It is built around the LM4040CYM3-4.1-TR. Its parts include 52 capacitors, 28 resistors, 15 diodes, 12 ICs and 7 connectors.
Main components
1README
README.mdSRAD_V2
This repository contains the schematic, PCB, and supporting design files for the Student Researched and Designed (SRAD) rocket avionics computer.
Project Structure
- SRAD_V2.kicad_pro — Main KiCad project file
- SRAD_V2.kicad_sch — Schematic file containing the full circuit design.
- SRAD_V2.kicad_pcb — PCB layout file for board routing and placement.
- SRAD_V2-backups/ — Automatically generated backup files created by KiCad.
- Custom E-cad Models/ — Custom or project-specific component symbols, footprints and 3D models used in the PCB design.
System Overview
The schematic is organized into blocks for clarity:
-
Power Delivery System (PDS)
Handles voltage regulation and distribution. Goal is to provide stable power to all avionics subsystems. -
E-match Firing Circuit (EMFC)
Provides quick burst of high current to e-matches via four separate channels. It also includes short circuit protection and various other safety features. -
MCU (Microcontroller Unit)
Central controller that interfaces with all sensors and peripherals. Will run the flight software and handle communication. -
IMU for Sensing Motion and Temperature -> LSM6DSV80XTR
-
Magnetometer -> MMC5983MA
-
Barometer -> MS5607-02BA
-
GPS -> MAX-M10S
-
Data Storage -> AT25SFQ64
Parts
163| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C10, C11, C13, C15, C16, C19, C20, C23, C24, C31, C32, C34, C37, C45 +8 |
| 11 | 10uF | Capacitor_SMD:C_1206_3216Metric | C18, C22, C28, C35, C36, C41, C42, C46, C47, C50, C52 |
| 8 | 1uF | Capacitor_SMD:C_0603_1608Metric | C14, C17, C21, C25, C29, C30, C33, C44 |
| 7 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R4, R15, R20, R21, R22, R23 |
| 6 | 4.7k | Resistor_SMD:R_0603_1608Metric | R3, R5, R6, R9, R12, R13 |
| 5 | 10R | Resistor_SMD:R_1206_3216Metric | R8, R16, R17, R18, R19 |
| 5 | 806R | Resistor_SMD:R_0603_1608Metric | R2, R7, R10, R11, R24 |
| 5 | ~ | Schottky_Diode:DIODE_MSP3V3 | D2, D8, D9, D10, D11 |
| 4 | Fuse_Small | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | FU1, FU2, FU3, FU4 |
| 4 | MOSFET N-CH | NTMFS5C673NT1G-2:TRANS_NTMFS5C673NT1G | Q1, Q2, Q3, Q4 |
| 4 | MountingHole | MountingHole:MountingHole_3.5mm_Pad_Via | H1, H2, H3, H4 |
| 4 | ~ | Screw_Terminal:691210910002 | EM1, EM2, EM3, EM4 |
| 3 | 22uF | Capacitor_SMD:C_1206_3216Metric | C38, C39, C40 |
| 3 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J6, J7 |
| 3 | LED | 150120SS75000:WL-SMCW_1206 | LED1, LED2, LED3 |
| 3 | TVS diode | Diode_SMD:D_SOD-323 | D5, D6, D12 |
| 2 | 10nF | Capacitor_SMD:C_0402_1005Metric | C12, C27 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C1, C4 |
| 2 | TVS diode | Diode_SMD:D_SOD-123F | D1, D3 |
| 2 | ~ | S02B-XASS-1:CONN2_S02B-XASS_295x496_JST | J2, J4 |
| 2 | ~ | Gate_Driver:SOP65P490X110-9N | IC9, IC10 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R26 |
| 1 | 120R | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | 2.2uH | Inductor_SMD:L_Bourns_SRP5030T | L2 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 2200uF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C43 |
| 1 | 27nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 33.2k | Resistor_SMD:R_0603_1608Metric | R14 |
| 1 | 47pF | Capacitor_SMD:C_0402_1005Metric | C26 |
| 1 | 500k | Resistor_SMD:R_0603_1608Metric | R28 |
| 1 | 68k | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ1 |
| 1 | Conn_01x01_Pin | Connector_PinHeader_1.27mm:PinHeader_1x01_P1.27mm_Vertical | J5 |
| 1 | Crystal | VXM7_9032_25M0000000:VXM7_MCH | X1 |
| 1 | G*** | kibuzzard-6A9704D1 | kibuzzard-6A9704D1 |
| 1 | G*** | kibuzzard-6AC04A03 | kibuzzard-6AC04A03 |
| 1 | G*** | kibuzzard-6A95CC9C | kibuzzard-6A95CC9C |
| 1 | G*** | kibuzzard-6A3D75FD | kibuzzard-6A3D75FD |
| 1 | G*** | kibuzzard-6A876244 | kibuzzard-6A876244 |
| 1 | G*** | kibuzzard-6A6394C9 | kibuzzard-6A6394C9 |
| 1 | G*** | kibuzzard-6A95CC6E | kibuzzard-6A95CC6E |
| 1 | G*** | kibuzzard-6AC0F9EB | kibuzzard-6AC0F9EB |
| 1 | G*** | kibuzzard-6A982418 | kibuzzard-6A982418 |
| 1 | G*** | kibuzzard-6AC049EA | kibuzzard-6AC049EA |
| 1 | G*** | kibuzzard-6A9050F6 | kibuzzard-6A9050F6 |
| 1 | G*** | kibuzzard-6ABFFFA9 | kibuzzard-6ABFFFA9 |
| 1 | G*** | kibuzzard-6A95C1A9 | kibuzzard-6A95C1A9 |
| 1 | G*** | kibuzzard-6AC0FA62 | kibuzzard-6AC0FA62 |
| 1 | G*** | kibuzzard-6A95C150 | kibuzzard-6A95C150 |
| 1 | G*** | kibuzzard-6A95CBD7 | kibuzzard-6A95CBD7 |
| 1 | G*** | kibuzzard-6A95C5A9 | kibuzzard-6A95C5A9 |
| 1 | G*** | kibuzzard-6A95C804 | kibuzzard-6A95C804 |
| 1 | G*** | kibuzzard-6A6394D1 | kibuzzard-6A6394D1 |
| 1 | LOGO | pcbway:pcbway_logo | G*** |
| 1 | LOGO | UMSATS_thick:UMSATS_thick | G*** |
| 1 | NPN BJT | Package_TO_SOT_SMD:SOT-23 | Q5 |
| 1 | Schottky Diode | Diode_SMD:D_SMA | D4 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | TVS diode | PTVS3V3S1UTR_115:CR_PTVS3V_NEX-L | D7 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | USB1 |
| 1 | Vol Ref. | Package_TO_SOT_SMD:SOT-23 | U1 |
| 1 | op-amp | TS941ILT:SOT23-5L_STM | IC11 |
| 1 | ~ | Package_LGA:LGA-8_3x5mm_P1.25mm | IC6 |
| 1 | ~ | RF_GPS:ublox_MAX | IC3 |
| 1 | ~ | MMC5983MA:MMC5983MA_MEM | IC4 |
| 1 | ~ | spdt_switch:SW_SLW-913535-2A-SMT | SW1 |
| 1 | ~ | Package_QFP:LQFP-144_20x20mm_P0.5mm | IC1 |
| 1 | ~ | RSP_122811_02-2:SAMTEC_RSP-122811-02 | J3 |
| 1 | ~ | Package_TO_SOT_SMD:SOT-23-6 | IC7 |
| 1 | ~ | Current_Sensor:D0008A-IPC_A | IC8 |
| 1 | ~ | push_button:SW_TS18-5-15-SL-160-SMT-TR | SW2 |
| 1 | ~ | LSM6DSVTR:LGA14-L_2P59X3P1X0P5_STM | IC2 |
| 1 | ~ | NAND_Flash:SON127P600X800X80-8N | IC5 |
The 161 most common of 163 parts.
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Questions
How big is the SRAD V2 PCB?
It measures 76.2 × 152.4 mm and has 4 copper layers, 1.72 mm thick.
What parts does the SRAD V2 use?
163 parts, built around the LM4040CYM3-4.1-TR. 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 SRAD V2 KiCad files?
From the UMSATS/SRAD-AvionicsComputer repository on GitHub, at the commit this page was made from: the board is SRAD_V2/SRAD_V2.kicad_pcb and its schematic Breakout Boards/Barometer_breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SRAD V2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask UMSATS before reusing the design.