4 layers110 × 90 mm
4 layers160 × 80 mm
Powerboard
SemuBot/semubot-electronicsFiles for SemuBot PCB design.
- Size
- 160 × 80 mm
- Copper layers
- 4
- Thickness
- 0.62 mm
- Parts
- 130
- Nets
- 76
- Pads
- 524
- Tracks, vias
- 639, 356
- Pours
- 138
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 15 Jan 2024
- Updated
- 29 Oct 2026
Overview
Powerboard is an open-source printed circuit board by SemuBot, from the SemuBot/semubot-electronics repository on GitHub. It is a 4-layer board of 160 × 80 mm with 130 parts on 76 nets, routed with 639 tracks and 356 vias.
Its parts include 60 capacitors, 28 resistors, 18 transistors, 6 ICs and 6 connectors.
README
wheelbase/README.mdWheelbase
Overview
This project implements a 3-motor BLDC wheelbase controller using an STM32G4 microcontroller and three independent 3-phase gate-driver/MOSFET power stages, one per wheel.
Components
Microcontroller
- STM32G474RET6 Main controller (LQFP-64).
BLDC Drivers
- DRV8353FSRTAR (x3) 3-phase gate driver with integrated current-shunt amplifiers, one per motor.
MOSFETs
- AON7262E (x18) N-channel MOSFETs for the power stage, 6 per motor (3-phase half-bridges).
Current Sensing
- 9x 10 mΩ shunt resistors (2512 package), 3 per motor, read out through each DRV8353's integrated current-shunt amplifiers.
Voltage Regulation
- RT9013-33GB 3.3V LDO regulator.
Power Input & Connectors
-
XT30PW-M Main DC power input connector.
-
MR30PW-M (x3) Motor phase power connectors, one per motor.
-
10155435-00011LF (Amphenol) USB Type-C connector.
-
B5B-XH-A_LF(SN) (JST XH) (x6) 5-pin connectors for Hall/sensor inputs.
-
MTSW-104-09-L-S-400 (Samtec) 4-pin header, general purpose/debug I/O.
-
DS1013-10SSIB1 10-pin connector for general purpose I/O.
ESD / Overvoltage Protection
- PRTR5V0U2X ESD protection for data lines (standard KiCad library part).
- SMCJ33A 33V TVS diode for transient/overvoltage protection.
- BZX84C3V3 3.3V zener diode.
Timing & Clock
- X322516MLB4SI Crystal resonator for the STM32's HSE clock.
User Interface
- 1x green + 4x red status LEDs.
Technical Summary
Power Stage
- MOSFETs: 18x AON7262E (6 per motor)
- Gate Drivers: 3x DRV8353FSRTAR
- Current Sense Resistors: 9x 10mΩ (2512 package), read via the DRV8353's built-in current-shunt amplifiers (no separate current-sense ADC on this revision)
Parts
130| Qty | Value | Footprint | References |
|---|---|---|---|
| 31 | Vault:CAPC1608X10N | C11, C12, C14, C15, C16, C17, C18, C21, C23, C25, C27, C28, C29, C30, C32, C33 +15 | |
| 20 | Vault:RESC1608X06N | R2, R10, R11, R12, R13, R14, R17, R18, R19, R20, R21, R22, R25, R26, R27, R28 +4 | |
| 17 | Vault:CAPC5750X31N | C38, C39, C40, C47, C48, C49, C50, C51, C52, C53, C54, C55, C56, C57, C58, C59 +1 | |
| 8 | Vault:CAPAE10083X105M | C1, C3, C10, C13, C19, C22, C26, C31 | |
| 8 | Vault:INF-PG-TDSON-8-1_V | Q2, Q4, Q5, Q6, Q8, Q10, Q11, Q12 | |
| 8 | , , , , , , , | ||
| 8 | Vault:RESC6432X09N | R1, R3, R7, R9, R15, R16, R23, R24 | |
| 6 | Vault:1711725-Footprint-1 | J1, J2, J3, J4, J5, J6 | |
| 4 | Vault:INF-PG-TO252-3-11_A_L | Q1, Q3, Q7, Q9 | |
| 4 | Vault:INDP134126X50N | L1, L2, L3, L4 | |
| 4 | Vault:TSSOP50P640X120_HS-39N | U1, U2, U3, U4 | |
| 4 | Vault:FP-GRM31C-0_2-e0_3_0_8-IPC_A | C2, C4, C20, C24 | |
| 4 | Vault:DPAK200P800X170-5N | Q13, Q14, Q16, Q17 | |
| 2 | Vault:INF-PG-HSOF-8-1_V | Q15, Q18 | |
| 1 | Vault:ADI-UF-20_V | U6 | |
| 1 | Vault:FP-MS-16-05-08-1669-IPC_B | U5 |
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Questions
How big is the Powerboard PCB?
It measures 160 × 80 mm and has 4 copper layers, 0.62 mm thick.
What parts does the Powerboard use?
130 parts. 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 Powerboard KiCad files?
From the SemuBot/semubot-electronics repository on GitHub, at the commit this page was made from: the board is powerboard/powerboard.kicad_pcb and its schematic powerboard/hot-swap.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Powerboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask SemuBot before reusing the design.