2 layers40 × 75 mm
4 layers250 × 145 mm
KARCA v2
rice-eclipse/kARCA_v2Schematics and Board files for the Titan II/Proxima Hybrid Engine Control System
- Size
- 250 × 145 mm
- Copper layers
- 4
- Thickness
- 1.32 mm
- Parts
- 323
- Nets
- 214
- Pads
- 919
- Tracks, vias
- 1,836, 260
- Pours
- 21
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Sep 2024
- Updated
- 25 May 2026
Overview
KARCA v2 is an open-source printed circuit board by rice-eclipse, from the rice-eclipse/kARCA_v2 repository on GitHub. It is a 4-layer board of 250 × 145 mm with 323 parts on 214 nets, routed with 1,836 tracks and 260 vias.
It is built around the AD8223ARZ, MCP3208-BI/P and AP62300WU, with the NUP4202W1, TLVH431CPK and TVS1400DRV among its other parts. Its parts include 121 resistors, 73 capacitors, 30 ICs, 17 diodes and 9 connectors.
Main components
12
AD8223ARZ
SOIC-8-12V~-2V、2V~12V -40℃~+85℃ 0.07% 0.3V/us 1 12nA 18us 250uV 2nA 2uV/℃ 30nV/√Hz@1kHz 350uA 3V~24V 5V/V~1000V/V 5pA/℃ 80dB 80dB External resistor gain、Overvoltage protection、EMI filtering/RF suppression Rail-to-rail output SOIC-8 Instrumentation Amplifiers ROHSAnalog DevicesInstrumentation Amplifiers
MCP3208-BI/P
PDIP-16-40℃~+85℃ 0.5LSB 100kHz 12 1LSB 1MHz、2MHz 2.7V~5.5V 500nA 8 External External Multiplexers、Bipolar input Not supported SAR SPI Yes PDIP-16 Analog to Digital Converters (ADC) ROHSMicrochip TechnologyAnalog To Digital Converters (ADC)
AP62300WU
TSOT-23-6-40℃~+125℃ 1 155uA 3A 4.2V~18V 750kHz 800mV~7V Adjustable Buck Buck Built-in Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
NUP4202W1
SC-88-40℃~+125℃ 1.5pF、3pF 14.5V 28A@8/20us 500W 5V 5uA 6V ESD IEC 61000-4-2 SC-88 ESD and Surge Protection (TVS/ESD) ROHSonsemiESD And Surge Protection (TVS/ESD)
TLVH431CPK
SOT-89-30℃~+70℃ 1.24V~18V 1.24V~18V 100uA 70mA Adjustable Parallel ±1.5% SOT-89-3 Voltage Reference ROHSTexas InstrumentsVoltage Reference
TVS1400DRV
WSON-6-EP(2x2)-40℃~+125℃ 120pF 14V 16.9V 19.3V 2.2nA 43A@8/20us 80W@8/20us IEC 61000-4-2、IEC 61000-4-5 TVS Unidirectional WSON-6-EP(2x2) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
1206W4F1001
1206-55℃~+155℃ 1kΩ 200V 250mW Thick Film Resistor ±1% ±100ppm/℃ 1206 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount
KT-1206Y
12061.8V~2.4V 120° 20mA 210mcd 48mW 586nm~596nm 598nm Discrete Diode Water Clear Yellow 1206 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete1206W4F1002
1206-55℃~+155℃ 10kΩ 200V 250mW Thick Film Resistor ±1% ±100ppm/℃ 1206 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
CL21B105KBFNNNE
08051uF 50V X7R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMTARG06DTD2500N
1206-55℃~+155℃ 200V 250mW 250Ω Thin Film Resistor ±0.5% ±50ppm/℃ 1206 Chip Resistor - Surface Mount ROHSViking TechChip Resistor - Surface Mount
README
README.mdkARCA 2.0
kARCA 2.0 is a revision of kARCA: Rice Eclipse's Engine Control System PCB for the data collection and remote control of their Titan II and Proxima Hybrid Rocket Motors
It performs the same functions as kARCA with the addition of thermocouple data collection, driver current monitoring, and battery monitoring. In addition, various components have been replaced for updated ICs and the power regulation and load cell circuits have been revised.
A detailed description of the changes can be found on karca_v2/Docs/changelog
Detailed documentation on the circuit board can be found on karca_v2/Docs/main_documentation
Download and Usage
Download KiCAD
Navigate to your preferred folder and clone into the repository:
git clone https://github.com/rice-eclipse/kARCA_v2.gitOpen KiCAD and open the project file (.kicad_pro):
File > Open ProjectSchematics: karca_v2/Docs/Schematics
Spice Simulations: karca_v2/Docs/Simulations
Board Files: karca_v2/Docs/Board_Files
Parts
323| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | 1k | Resistor_SMD:R_1206_3216Metric | R14, R15, R18, R23, R24, R100, R105, R106, R109, R111, R113, R115, R117, R119, R120, R123 +40 |
| 44 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | DRV1, DRV2, DRV3, DRV4, TP1, TP2, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19 +28 |
| 22 | 0.1u | Capacitor_SMD:C_1206_3216Metric | C4, C5, C16, C20, C24, C28, C32, C40, C42, C46, C48, C52, C54, C58, C60, C66 +6 |
| 16 | 3.3k | Resistor_SMD:R_0402_1005Metric | R21, R22, R28, R29, R35, R36, R42, R43, R52, R57, R62, R103, R127, R128, R129, R130 |
| 12 | 1u | Capacitor_SMD:C_1206_3216Metric | C18, C22, C26, C30, C34, C36, C38, C64, Ce1, Ce2, Ce3, Ce4 |
| 12 | 680n | Capacitor_SMD:C_1206_3216Metric | C21, C25, C29, C33, C35, C37, C39, C43, C49, C55, C61, C65 |
| 9 | LED | LED_SMD:LED_1206_3216Metric | D2, D5, D7, D8, D10, D13, D16, D19, D22 |
| 8 | 0.01u | Capacitor_SMD:C_0402_1005Metric | C41, C44, C47, C50, C53, C56, C59, C62 |
| 8 | 100 | Resistor_SMD:R_1206_3216Metric | R63, R66, R69, R72, R75, R78, R81, R84 |
| 8 | 10k | Resistor_SMD:R_1206_3216Metric | R10, R12, R19, R90, R94, R98, R107, R121 |
| 6 | 10m | Resistor_SMD:R_2512_6332Metric | R108, R110, R112, R114, R116, R122 |
| 6 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1, Q4, Q9, Q10, Q11, Q12 |
| 6 | Fuse | Fuse:Fuse_1812_4532Metric | F2, F3, F4, F5, F6, F7 |
| 5 | D_Schottky | Diode_SMD:D_SMA | D11, D14, D17, D20, D23 |
| 5 | TLV9304xD | Package_SO:SO-14_3.9x8.65mm_P1.27mm | U6, U7, U9, U10, U17 |
| 4 | 10u | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C19, C23, C27, C31 |
| 4 | 1M | Resistor_SMD:R_1206_3216Metric | R67, R73, R79, R85 |
| 4 | 1u | Capacitor_SMD:C_0805_2012Metric | C3, C13, C14, C73 |
| 4 | 30 | Resistor_SMD:R_1206_3216Metric | R50, R55, R60, R101 |
| 4 | 330 | Resistor_SMD:R_1206_3216Metric | R20, R27, R34, R41 |
| 4 | 47k | Resistor_SMD:R_1206_3216Metric | R51, R56, R61, R102 |
| 4 | AD8223 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U18, U19, U20, U21 |
| 4 | AD8495 | Package_SO:MSOP-8_3x3mm_P0.65mm | U22, U24, U26, U28 |
| 4 | Jumper_3_Bridged12 | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | JP2, JP3, JP4, JP5 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | NUP4202 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U2, U5, U14, U16 |
| 4 | TLVH431 | Package_TO_SOT_SMD:SOT-23 | U23, U25, U27, U29 |
| 3 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C70, C74, C76 |
| 3 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C6, C7, C12 |
| 3 | MCP3208 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3, U11, U13 |
| 2 | 100n | Capacitor_SMD:C_1206_3216Metric | C8, C9 |
| 2 | 250 | Resistor_SMD:R_1206_3216Metric | R13, R14 |
| 2 | SW_SPDT_MSM | custom-footprints:SW_500SSP1S2M2QEA | SW2, SW4 |
| 2 | Screw_Terminal_01x10 | custom-footprints:P-2604-1110 | J6, J9 |
| 1 | 1.8k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 100k | Resistor_SMD:R_1206_3216Metric | R124 |
| 1 | 100n | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 10A | custom-footprints:FUSE_4628 | F1 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 15k | Resistor_SMD:R_1206_3216Metric | R16 |
| 1 | 3.3u | Inductor_SMD:L_Sunlord_SWPA5040S | L1 |
| 1 | 40k | Resistor_SMD:R_1206_3216Metric | R5 |
| 1 | 470 | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 47u | Capacitor_SMD:C_0805_2012Metric | C17 |
| 1 | 50k | Resistor_SMD:R_0805_2012Metric | R125 |
| 1 | 52.3k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 5k | Resistor_SMD:R_1206_3216Metric | R17 |
| 1 | AP62300WU | Package_TO_SOT_SMD:TSOT-23-6 | U8 |
| 1 | Buzzer | custom-footprints:P-2604-1102 | J11 |
| 1 | Conn_02x10_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x10_P2.54mm_Vertical | J12 |
| 1 | Conn_Batt | custom-footprints:P-2604-1102 | J2 |
| 1 | HBT | LED_SMD:LED_1206_3216Metric | D6 |
| 1 | INA180A2 | Package_TO_SOT_SMD:SOT-23-5 | U33 |
| 1 | INA180A4 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U31 |
| 1 | INA180A4 | Package_TO_SOT_SMD:SOT-23-5 | U30 |
| 1 | Keyhole ignition switch | custom-footprints:P-2604-1102 | E1 |
| 1 | LM4040DBZ-4.1 | Package_TO_SOT_SMD:SOT-23 | D4 |
| 1 | LOGO | logo:karca_logo | G*** |
| 1 | LOGO | logo:logo | G*** |
| 1 | LoadCell_1_2 | custom-footprints:P-2604-1108 | J4 |
| 1 | LoadCell_3_4 | custom-footprints:P-2604-1108 | J5 |
| 1 | PN2222A | Package_TO_SOT_THT:TO-92_Inline | Q2 |
| 1 | SDT10A45P5 | Diode_SMD:D_PowerDI-5 | D1 |
| 1 | Screw_Terminal_01x04 | custom-footprints:P-2604-1104 | J10 |
| 1 | Screw_Terminal_01x08 | custom-footprints:P-2604-1108 | J8 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | TLV9301xDBV | Package_TO_SOT_SMD:SOT-23-5 | U36 |
| 1 | TVS1400DRV | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U1 |
Questions
How big is the KARCA v2 PCB?
It measures 250 × 145 mm and has 4 copper layers, 1.32 mm thick.
What parts does the KARCA v2 use?
323 parts, built around the AD8223ARZ, MCP3208-BI/P, AP62300WU and NUP4202W1. 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 KARCA v2 KiCad files?
From the rice-eclipse/kARCA_v2 repository on GitHub, at the commit this page was made from: the board is karca_v2/karca_v2.kicad_pcb and its schematic karca_v2/active_filters.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the KARCA v2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask rice-eclipse before reusing the design.
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