4 layers93.7 × 43.7 mm
Flight Computer
SunDevilRocketry/Flight-Computer
General purpose flight computer for high powered rocketry projects.
113 parts5
4 layers116.8 × 56.7 mm
Engine Controller
SunDevilRocketry/Liquid-Engine-Controller1Main microcontroller board for embedded control of SDR's liquid bipropellant engine.
- Size
- 116.8 × 56.7 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 119
- Nets
- 180
- Pads
- 548
- Tracks, vias
- 1,387, 177
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 26 Jun 2022
- Updated
- 9 Jun 2023
Overview
Engine Controller is an open-source printed circuit board by SunDevilRocketry, from the SunDevilRocketry/Liquid-Engine-Controller repository on GitHub. It is a 4-layer board of 116.8 × 56.7 mm with 119 parts on 180 nets, routed with 1,387 tracks and 177 vias.
It is built around the CP2102-GMR, AD623ARZ-R7 and SST25VF040B-50-4I-S2AE-T, with the MAX4617EUE+T, TS391IYLT and SML-LX1206GC-TR among its other parts. Its parts include 38 resistors, 33 capacitors, 14 ICs, 14 connectors and 11 diodes. It belongs with the STM32 boards of this library.
Main components
12
CP2102-GMR
WQFN-28-EP(5x5)-40℃~+85℃ 1Mbps 20mA 3V~3.6V 80uA Transceiver USB 2.0 WQFN-28-EP(5x5) USB Converters ROHSSilicon LabsUSB Converters
AD623ARZ-R7
SOIC-8-40℃~+85℃ -6V~-2.5V、2.5V~6V 0.3V/us 1 100nV/℃ 12V 200uV 20us 250pA 25nA 35nV/√Hz@1kHz 3V~12V 550uA 5pA/℃ 800kHz 80dB 80dB Rail-to-Rail Output SOIC-8 Instrumentation Amplifiers ROHSAnalog DevicesInstrumentation AmplifiersSST25VF040B-50-4I-S2AE-T
SOIC-8-208mil0℃~+70℃ 100 Years 100,000 cycles 2.7V~3.6V 4Mbit 50MHz 5uA SPI Software write protection、Write enable latch SOIC-8-208mil NOR FLASH ROHSMicrochip TechnologyNOR FLASH
MAX4617EUE+T
TSSOP-16-40℃~+85℃ 1 10ns 10Ω 2V~5.5V 32pF 7ns 8:1 TSSOP-16 Analog Switches, Multiplexers ROHSMaxim Integrated (Analog Devices)Analog Switches, Multiplexers
TS391IYLT
SOT-23-5-18V~-1V、1V~18V -40℃~+125℃ 1 1.3us 1mV 200uA 25nA 2V~36V 300us 36V 5nA DTL、TTL、CMOS、ECL SOT-23-5 Comparators ROHSSTMicroelectronicsComparators
SML-LX1206GC-TR
1206LED Indication - DiscreteLumex
SM5819PL-TP
SOD-123FL-65℃~+125℃ 1 Independent 1A 20uA@15V 30A 330mV@100mA 40V SOD-123FL Schottky Diodes ROHSMicro Commercial ComponentsSchottky Diodes
54602-908LF
插件-40℃~+70℃ 1 12.7mm 15.3mm 17.74mm Copper Alloy Gold Harpoon Contact (Plastic) Non-LED Non-PoE RJ45 Jack Right Angle Unshielded cat3 Plugin Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHSAmphenolEthernet Connectors / Modular Connectors (RJ45 RJ11)CLMVC-FKA-CL1D1L71BB7C3C3
SMD-4P-40℃~+100℃ 1.9V、2.9V、3V 460nm~475nm、520nm~535nm、619nm~624nm 49mW、49mW、60mW 5mA 71mcd、112mcd、355mcd Common Anode Red, Green, Blue Water Clear SMD-4P LED Indication - Discrete ROHSCree LEDLED Indication - Discrete
ECS-240-18-33-JGN-TR
SMD3225-4P-40℃~+85℃ 18pF 24MHz 40Ω ±20ppm ±30ppm SMD3225-4P Crystals ROHSECSCrystals
EJ508A
插件-15-+90℃ 12V 2mm 500V 5A 8.8x13.5x10.85mm Black Brass, Phosphor Bronze PBT 插件 Power connector / plug connector ROHSMPDDC Power Connectors
PPTC041LFBN-RC
插件,P=2.54mm-40℃~+105℃ 1 1x4P 2.54mm 250V 3A 4P 8.51mm Phosphor bronze Square Hole Through Hole Tin Top Plugin,P=2.54mm Female Headers ROHSSullins Connector SolutionsFemale Headers
README
README.mdLiquids Engine Controller
Current PCB Revision: 5.1
PCB Part Number: L0002
The Liquid Engine Controller is the main embedded processor of Sun Devil Rocketry's Liquid Engine. As the brains of the engine, the controller is responsible for executing propellant feed sequences semi-autonomously, logging sensor data, and transmitting engine telemetry. The controller is equipped with an STM32 ARM Cortex M7 processor and 4Mb of external flash for data logging. The board includes a micro-SD card jack for easy access to the logged data. The board includes many power sources for flexible use of the controller during testing and normal operation. These include a 12V power jack, a USB Type B connector, and a 2-pin male pin header. The board includes short circuit protection on the main power rail and regulates the multiplexed supply to 5V and 3.3V with a buck converter and linear regulator (LDO) respectively. The board interfaces with a PC through either the USB port or the 8-pin telemetry connector, which allows wireless transceiver modules with either a UART or SPI interface to be connected. The screw terminals on the board connect to the ignition circuitry. An e-match is used to initiate combustion, and two continuity wires are used to provide the controller feedback on the ignition state. The ignition current is routed through an additional screw terminal which serves as a safety/arming switch. The board interfaces with all of the engine sensors, including eight pressure transducers, a thermocouple, and a load cell. The pressure transducer outputs are amplified with a programmable-gain instrumentation amplifier, which allows for up to 256 calibration settings. The thermocouple output is processed using a cold-junction compensation IC. Additionally, the board includes a reset button and several LEDs for visual indication of power and firmware status.
Working Directory Structure:
cad: 3d models
doc: documentation
img: images of circuit/footprints for github display
lib: libraries for schematic symbols and footprints
production: files needed for pcb fabrication, e.g. gerbers, profile, drill file
sim: simulation models/files
src: source design files, e.g. schematic and PCB layout files
3D Model:
Parts
119| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 0.1uF | Engine-Controller:CAP_0603 | C8, C9, C11, C13, C14, C15, C16, C20, C21, C22, C24, C31, C32 |
| 11 | 10k | Engine-Controller:RES_0603 | R6, R8, R10, R11, R12, R14, R20, R34, R35, R36, R37 |
| 6 | 1uF | Engine-Controller:CAP_0603 | C2, C3, C12, C18, C19, C30 |
| 4 | 10 | Engine-Controller:RES_0603 | R22, R23, R24, R25 |
| 4 | 100k | Engine-Controller:RES_0603 | R4, R7, R15, R18 |
| 4 | 10uF | Engine-Controller:T491A106K010AT | C6, C7, C27, C28 |
| 4 | Mounting-Hole | Engine-Controller:MountingHole_4.3mm_M4_DIN965 | H1, H4, H5, H6 |
| 4 | SML-LX1206GC-TR | Engine-Controller:SML-LX1206GC-TR | D3, D6, D7, D9 |
| 3 | 2.2uF | Engine-Controller:CAP_0603 | C17, C23, C26 |
| 3 | 2k | Engine-Controller:RES_0603 | R2, R31, R32 |
| 2 | 100 | Engine-Controller:RES_0603 | R26, R27 |
| 2 | 240 | Engine-Controller:RES_0603 | R5, R28 |
| 2 | 2M | Engine-Controller:RES_0603 | R30, R38 |
| 2 | 470 | Engine-Controller:RES_0603 | R3, R9 |
| 2 | 68uF | Engine-Controller:EEEFPV680XAP | C1, C29 |
| 2 | 82 | Engine-Controller:RES_0603 | R1, R16 |
| 2 | 8pF | Engine-Controller:CAP_0603 | C33, C34 |
| 2 | AD623ARZ-R7 | Engine-Controller:AD623ARZ-R7 | U8, U15 |
| 2 | Jumper_NO | Engine-Controller:Jumper-NO | J1, J2 |
| 2 | LMS8117AMP-3.3_NOPB | Engine-Controller:LMS8117AMP-3.3NOPB | U3, U10 |
| 2 | MAX4617EUE+T | Engine-Controller:max4617eue | U12, U13 |
| 2 | SM5819PL-TP | Engine-Controller:SM5819PL-TP | D4, D5 |
| 2 | SMBJ36CA-13-F | Engine-Controller:CDSOT23-SM712 | D10, D11 |
| 1 | 0530470410 | Engine-Controller:0530470410 | P17 |
| 1 | 10nF | Engine-Controller:CAP_0603 | C4 |
| 1 | 140-504-415-000 | Engine-Controller:140-504-415-000 | P6 |
| 1 | 150uF | Engine-Controller:EEEFP1E151AL | C5 |
| 1 | 1M | Engine-Controller:RES_0603 | R29 |
| 1 | 20021511-00026T4LF | Engine-Controller:20021511-00026T4LF | P8 |
| 1 | 20k | Engine-Controller:RES_0603 | R21 |
| 1 | 280 | Engine-Controller:RES_0603 | R17 |
| 1 | 282837-2 | Engine-Controller:282837-2 | P11 |
| 1 | 282837-6 | Engine-Controller:282837-6 | P2 |
| 1 | 3.3k | Engine-Controller:RES_0805 | R19 |
| 1 | 3220-20-0200-00 | Engine-Controller:3220-20-0200-00 | P3 |
| 1 | 33uH | Engine-Controller:SRP1038A-330M | L1 |
| 1 | 4.7k | Engine-Controller:RES_0603 | R13 |
| 1 | 4.7uF | Engine-Controller:CAP_0603 | C10 |
| 1 | 470 | Engine-Controller:RES_0805 | R33 |
| 1 | 54602-908LF | Engine-Controller:54602-908LF | P9 |
| 1 | 647676-2 | Engine-Controller:647676-2 | P7 |
| 1 | CLMVC-FKA-CL1D1L71BB7C3C3 | Engine-Controller:CLMVC-FKA-CL1D1L71BB7C3C3 | D1 |
| 1 | CP2102-GMR(QFN28) | Engine-Controller:CP2012-GMR | U5 |
| 1 | ECS-240-18-33-JGN-TR | Engine-Controller:ECS-240-18-33-JGN-TR | Y1 |
| 1 | EJ508A | Engine-Controller:12V_power_jack | P1 |
| 1 | LM22672MRE-5.0_NOPB | Engine-Controller:LM22672MRE-5.0_NOPB | U2 |
| 1 | Logo | Engine-Controller:Logo | LOGO2 |
| 1 | Micro_SD_Card | Engine-Controller:MEM2075-00-140-01-A | P4 |
| 1 | PPTC041LFBN-RC | Engine-Controller:PPTC041LFBN-RC | P18 |
| 1 | PTS647SM38SMTR2LFS | Engine-Controller:PTS647SM38SMTR2LFS | B1 |
| 1 | QFN65P500X500X100-21N_MCP96RL00T-E/MX | Engine-Controller:MCP96L01T-E_MX | U14 |
| 1 | QS5U17TR | Engine-Controller:QS5U17TR | Q1 |
| 1 | RB160VAM-60TR | Engine-Controller:RB160VAM-60TR | D2 |
| 1 | SN65HVD71DR | Engine-Controller:SN65HVD71DR | U7 |
| 1 | SP0504BAHTG | Engine-Controller:SP0504BAHTG | D8 |
| 1 | SST25VF040B-50-4I-S2AE-T | Engine-Controller:SST25VF040B-50-4I-S2AE-T | U4 |
| 1 | STM32H750VBTx | Engine-Controller:STM32H750VBT6 | U1 |
| 1 | TPS2115APWR | Engine-Controller:TPS2115APWR | U6 |
| 1 | TS391IYLT | Engine-Controller:TS391IYLT | U11 |
| 1 | USB | Engine-Controller:USB-TypeB | P5 |
Questions
How big is the Engine Controller PCB?
It measures 116.8 × 56.7 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Engine Controller use?
119 parts, built around the CP2102-GMR, AD623ARZ-R7, SST25VF040B-50-4I-S2AE-T and MAX4617EUE+T. 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 Engine Controller KiCad files?
From the SunDevilRocketry/Liquid-Engine-Controller repository on GitHub, at the commit this page was made from: the board is src/Engine-Controller/Engine-Controller.kicad_pcb and its schematic src/Engine-Controller/Connectors.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Engine Controller design in my own project?
Its repository states no licence, so its author keeps all rights: ask SunDevilRocketry before reusing the design.
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