CMAIN
About the CMAIN PCB
CMAIN is an open source PCB design by Arrow-air, published on GitHub. It is a 4-layer board measuring 210.6 × 220 mm, with 245 components from 71 distinct parts.
Other key parts include the TSYS01, TJA1049T/3J, MCP2515-I/SO, SMTSOM380BTR and SY8205FCC. By type, the board carries 64 resistors, 56 connectors, 45 capacitors, 26 diodes, 21 ICs and 9 relays.
From the project
Project Caribou documentation, designs, and project artifacts.
- GitHub issue: #8 — Design Caribou main PCB: merge Feather PDB and Quiver main PCB - Starting point: Project Feather PDB and Project Quiver main PCB. - Scope: low-voltage/signal-level avionics integration, 6-motor outputs, ArduPilot/CAN architecture, ESC signal outputs, sensor connections, and central-frame form factor. High-voltage/current handling is out of scope. - External 3D viewer / Fusion share link: - STEP export: manufacturing/CMAINPCB.step`
Main components on the CMAIN
CMAIN bill of materials (BOM)
245 components, 71 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TSYS01 | QFN65P400X400X90-17N | IC1 |
| 1 | TJA1049T/3J NXP | SOIC127P600X175-8N | U1 |
| 1 | MCP2515-I/SO Microchip | SOIC127P1030X265-18N | U2 |
| 4 | SMTSOM380BTR YIYUAN(怡远) | SMD_BD6.0-D4.2 | U3, U6, U7, U8 |
| 3 | SY8205FCC | VREG_SY8205FCC | U4, U17, U18 |
| 4 | SMTSO3050CTJ Sinhoo(雄和远景) | SMD_SMTSO3060CTJ | U5, U19, U20, U21 |
| 4 | ~ XUNPU(讯普) | WAFER-GH1.25-4PLB | U13, U14, U15, U16 |
| 3 | LTC4370IMS#PBF Analog Devices | MSOP-16_3x4.039mm_P0.5mm | U29, U30, U31 |
| 2 | SIR804DP-T1-GE3 SIRA99DP-T1-GE3 VISHAY(威世) | fp_a2a0cc2e74 | Q1, Q2 |
| 6 | SIR804DP-T1-GE3 PSMN4R3-30BL,118 VISHAY(威世) | POWERPAK-SO-8_L5.9-W4.9 | Q4, Q5, Q6, Q7, Q8, Q9 |
| 1 | NX3225GB-16M-STD-CRA-2 16MHz NDK | NX3225GB-16M-STD-CRA-2 | X1 |
| 4 | ~ Sinhoo(雄和远景) | SCREW-SMD_TH162050CTJ | CN13, CN14, CN15, CN16 |
| 1 | SSQ-120-01-F-D RPI_5_WITH_SSQ-120-01-F-D | SSM-120-XXX-DV | J1 |
| 8 | 1778719 | 1778719 | J2, J6, J10, J16, J19, J21, J24, J50 |
| 2 | AXK5S00347YG AXK6S00547YG | AXK6S00547YG | J3, J4 |
| 4 | SM04B-GHS-TB(LF)(SN) SM04B-GHS-TB_LF__SN_ | SM04B-GHS-TB | J5, J7, J15, J35 |
| 3 | 1814935 B04B-JWPF-SK-R | B04B-JWPF-SK-R | J8, J39, J49 |
| 1 | SM04B-GHS-TB(LF)(SN) SM04B-GHS-TB_LF__SN_ | SM04B-GHS-TB_J9 | J9 |
| 1 | SSQ-104-01-L-D M9N-G4-3100 | M9N-G4-3100 | J11 |
| 11 | B04B-JWPF-SK-R | B04B-JWPF-SK-R | J12, J13, J23, J27, J32, J40, J45, J52 +3 |
Show 51 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XT30PW-F | XT30PW-F_AMASS_XT30PW-F | J14 |
| 1 | 1814922 SM03B-GHS-TB(LF)(SN) JST | CONN-TH_SM03B-GHS-TB-LF-SN | J17 |
| 6 | B08B-JWPF-SK-R | B08B-JWPF-SK-R | J25, J26, J28, J34, J42, J44 |
| 3 | B06B-JWPF-SK-R | B06B-JWPF-SK-R | J29, J30, J31 |
| 1 | SM05B-GHS-TB(LF)(SN) SM05B-GHS-TB_LF__SN_ | SM05B-GHS-TB | J36 |
| 2 | 1778719 B04B-JWPF-SK-R | B04B-JWPF-SK-R | J37, J38 |
| 1 | SM06B-GHS-TB(LF)(SN) SM06B-GHS-TB_LF__SN_ | SM06B-GHS-TB | J41 |
| 4 | SM04B-GHS-TB(LF)(SN) B04B-JWPF-SK-R | B04B-JWPF-SK-R | J43, J46, J48, J56 |
| 2 | LSHM-120-02.5-L-DV-A-S-K-TR GIGABLOX_NANO_SWITCH_REVA_MODULE | fp_072ec239da | J47, J51 |
| 2 | 0154002.DR | 0154002DR | F1, F7 |
| 3 | 0154005.DR | 0154005DR | F2, F3, F4 |
| 1 | 1812L110/24DR 1812L110_24DR | 1812L010DR | F8 |
| 9 | CPC1019N | SOP254P610X218-4N | K1, K2, K4, K5, K6, K7, K8, K9 +1 |
| 1 | CMT-8530S-SMT-TR | CMT8530SSMTTR | LS1 |
| 2 | SLW-913535-2A-SMT CUI Devices | SLW9135352ASMT | S1, S2 |
| 1 | TYPEC-303-ACP16 XUNPU(讯普) | USB-C-SMD_TYPEC-303-ACP16 | USB33 |
| 2 | APT2012LVBC/D APT2012LVBC_D | LEDC2012X85N | LED4, LED5 |
| 2 | PESD0603-240 LITTELFUSE | DIONC1608X55N | D1, D2 |
| 2 | SMBJ13CA hongjiacheng | D_SMB | D3, D4 |
| 1 | USBLC6-2SC6 ST(意法半导体) | SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | D5 |
| 2 | SS34 BORN(伯恩半导体) | SMB_L4.6-W3.6-LS5.3-RD | D6, D7 |
| 1 | SS14 R+O(宏嘉诚) | SMA_L4.3-W2.6-LS5.0-FD | D8 |
| 12 | APT2012SURCK | LED_APT2012SURCK | D9, D10, D11, D18, D19, D20, D21, D22 +4 |
| 6 | SMBJ20A hongjiacheng | D_SMB | D12, D13, D14, D15, D16, D17 |
| 3 | 3.3UH 3.3uH SHOU HAN(首韩) | IND-SMD_CYA0650-3.3UH | L1, L2, L3 |
| 7 | CC0805KRX7R9BB104 100nF 50V Yageo | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3, C4, C5, C27, C28, C31 |
| 9 | 0.1uF 50V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C8, C26, C33, C35, C36, C40, C42 +1 |
| 2 | CC0603JRNPO9BN8R0 8pF 50V Yageo | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C6, C7 |
| 6 | GCM31CC71E106KA03L 10uF 50V SAMSUNG(三星) | C1206 | C9, C10, C11, C12, C15, C16 |
| 6 | EEU-FC1E101S 100uF 100V NJCON(永立) | CAP-TH_BD10.0-P5.00-D0.6-FD_2 | C13, C14, C17, C18, C20, C21 |
| 1 | 22pF 50V | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C22 |
| 6 | 22uF 25V SAMSUNG(三星) | C1206 | C23, C24, C34, C39, C41, C46 |
| 3 | 1uF 50V | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C25, C37, C44 |
| 3 | CC0805KKX7R9BB474 0.47uF 50V Yageo | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C29, C30, C32 |
| 2 | 22pF 50V | C_0603_1608Metric | C38, C45 |
| 9 | 1K5 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R22, R26, R27, R42, R43, R44, R45 +1 |
| 6 | 100K 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R4, R5, R23, R33, R36 |
| 2 | 100R 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R6 |
| 5 | 10K 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R9, R25, R35, R38 |
| 1 | RC0805FR-0710KL 100k 150V Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 6 | RC0805FR-0710KL 10K 150V Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11, R17, R19, R20, R21 |
| 2 | 5K1 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R13 |
| 2 | RC0805FR-07120RL 120R 150V Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14, R18 |
| 1 | RC0805FR-070RL 0R 150V Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16 |
| 3 | 75K 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24, R34, R37 |
| 6 | 1R 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R28, R31, R32, R39, R40, R41 |
| 2 | 4K7 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R29, R30 |
| 1 | 47K 150V | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R47 |
| 9 | RC0805FR-072KL 2K 150V Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R50, R51, R52, R53, R54, R55, R74, R75 +1 |
| 6 | PA2512FKE070R002E 2mR Yageo | R_2512_6332Metric | R67, R68, R69, R70, R71, R72 |
| 3 | 560R 150V Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R77, R78, R79 |
CMAIN design files
The KiCad project lives in the Arrow-air/project-caribou repository on GitHub; these links point at the commit this page was built from.
CMAIN: common questions
How big is the CMAIN PCB?
The CMAIN measures 210.6 × 220 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the CMAIN?
245 components, from 71 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the CMAIN design files?
From the Arrow-air/project-caribou repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the CMAIN design in my own project?
The repository has no license, so all rights stay with Arrow-air. Use it as a reference, and ask the author before reusing the design.
