Main arm
About the Main arm PCB
Main arm is an open source PCB design by SJSURoboticsTeam, published on GitHub. It is a 2-layer board measuring 80 × 60 mm, with 52 components from 26 distinct parts.
Other key parts include the LF33_TO252, SN65HVD230, DT1446-04TS-7 and PRTR5V0U2AX-QVL. By type, the board carries 15 resistors, 11 capacitors, 7 diodes, 4 ICs, 3 connectors and 2 switches.
From the project
The 2024 - 2026 rover electrical monorepo
This is the repository for the SJSU Robotics Club Electrical team repository from 2024-2026.
Main components on the Main arm
Main arm bill of materials (BOM)
52 components, 26 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LF33_TO252 | TO-252AD | U1 |
| 1 | SN65HVD230 | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | DT1446-04TS-7 | SOT-23-6 | U3 |
| 1 | PRTR5V0U2AX-QVL | SOT-143_Handsoldering | U4 |
| 1 | MicroMod | micromod | J1 |
| 1 | Conn_ARM_JTAG_SWD_10 | PinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 5 | Conn_01x02_MountingPin | AMASS_XT60PW-F_1x02_P7.20mm_Horizontal | BatIn1, BatOut1, BatOut2, BatOut3, BatOut4 |
| 2 | Conn_01x04_MountingPin | Pluggable_Terminal_2.54mm_4P_Horizontal | CanArmOut1, CanIn1 |
| 1 | Conn_01x04_MountingPin | Pluggable_Terminal_2.54mm_4P_Vertical | CanOut1 |
| 1 | SMD1206B075TFT 0.75A | Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | USB_C_Receptacle_USB2.0_14P | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | Programming1 |
| 2 | SW_SPST | SW_SPST_CK_RS282G05A3 | SW1, SW2 |
| 6 | LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D3, D4, D5, D6, D7 |
| 1 | 3A | DO-221AC | D2 |
| 4 | 100n | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C11, C12, C13 |
| 4 | 10u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C7, C8, C9 |
| 2 | 1u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C6 |
| 1 | 2.2u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5 |
| 1 | 33k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 6 | 1.5k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R6, R7, R8, R9, R15 |
| 1 | TBD | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 2 | 5.1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R5 |
| 2 | 4.7k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10, R11 |
| 2 | 100k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12, R13 |
| 1 | 120 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14 |
Main arm design files
The KiCad project lives in the SJSURoboticsTeam/urc-electrical-2026 repository on GitHub; these links point at the commit this page was built from.
- Layoutmain_arm/main_arm.kicad_pcb
- Schematicmain_arm/main_arm.kicad_sch
Main arm: common questions
How big is the Main arm PCB?
The Main arm measures 80 × 60 mm, has 2 copper layers and is 1.59 mm thick.
How many components are on the Main arm?
52 components, from 26 distinct parts. The full bill of materials is listed on this page.
Where can I download the Main arm design files?
From the SJSURoboticsTeam/urc-electrical-2026 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Main arm design in my own project?
The repository has no license, so all rights stay with SJSURoboticsTeam. Use it as a reference, and ask the author before reusing the design.
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