40Vservo
About the 40Vservo PCB
40Vservo is an open source AVR/Arduino PCB design by SJSURoboticsTeam, published on GitHub. It is a 4-layer board measuring 20 × 20 mm, with 21 components from 11 distinct parts.
Its main chip is the ATmega328PB-M, from the AVR/Arduino family. Other key parts include the TMAG5170-Q1, MCP1792x-3302xDB and DRV8251ADDAR. By type, the board carries 10 capacitors, 5 resistors, 4 ICs and 1 crystal.
It belongs with the robotics & motion designs in this gallery.
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 40Vservo
40Vservo bill of materials (BOM)
21 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATmega328PB-M | QFN-32-1EP_5x5mm_P0.5mm_EP3.1x3.1mm | U1 |
| 1 | TMAG5170-Q1 | VSSOP-8_3.0x3.0mm_P0.65mm | U2 |
| 1 | MCP1792x-3302xDB | SOT-223-3_TabPin2 | U3 |
| 1 | DRV8251ADDAR | Texas_HSOP-8-1EP_3.9x4.9mm_P1.27mm | U4 |
| 1 | CSTNE8M00G550000R0 | Resonator_SMD_Murata_CSTxExxV-3Pin_3.0x1.1mm_HandSoldering | Y1 |
| 1 | Thermistor_NTC | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | TH1 |
| 1 | 2.2uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1 |
| 5 | 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C4, C5, C6, C7 |
| 4 | 10uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8, C9, C10, C11 |
| 4 | 50k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R4, R5 |
| 1 | 2.7k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
40Vservo 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.
- Layout40Vservo/40Vservo.kicad_pcb
- Schematic40Vservo/40Vservo.kicad_sch
40Vservo: common questions
What microcontroller does the 40Vservo use?
The 40Vservo is built around the ATmega328PB-M, from the AVR/Arduino family.
How big is the 40Vservo PCB?
The 40Vservo measures 20 × 20 mm, has 4 copper layers and is 1.600198 mm thick.
How many components are on the 40Vservo?
21 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the 40Vservo 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 40Vservo 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.
Can I test firmware for the 40Vservo without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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