FYSETC SB CAN V2 CAN Bus Distribution Board + USB Hub for StealthChanger

SB CAN V2 is a newly designed StealthBurner/StealthChanger tool board running Klipper. Based on STM32F072, it supports two communication modes—CAN Bus or USB—and integrates a USB 2.0 hub with up to three ports for accessories such as a probing/leveling sensor or AI camera. The board can mount vertically with an optional auxiliary board for quick front-cover install/removal.

Key features

• MCU: STM32F072 (Klipper-ready)
  

• PCB: 6-layer design with solid + tantalum capacitors

• Mounting: Two onboard M3 × 3.5 mm isolation standoffs (no printed parts needed)

• Connectivity modes: Hardware CAN/USB selector switch

• Serviceability: Onboard RESET and BOOT0 buttons for easy firmware updates

• Power stage: Independent high-power MOSFETs for fan and heater outputs (cooler, safer)

• 5V rail: Onboard DC-DC 5 V @ 3 A (up to 15 W peak)

• Input power: XT30 connector; includes custom cable

• USB hub: USB 2.0 hub with 3 ports (one provided on the auxiliary board)

• Drivers & I/O: Onboard TMC2209; 3× fans, 3× level-shifted IO, 1× RGB, 1× heater, 1× thermistor, status LED

• Sensors: Onboard ADXL345 accelerometer (for Klipper input-shaping)

• Port: USB-C for firmware flashing

• Aux board support: Adds 1× USB, 2× 3-wire fan headers, and 1× RGB; enables quick front-cover removal

What’s on the board (at a glance)

• Communication: CAN Bus or USB 2.0 (switchable)

• USB hub: 3× USB 2.0 ports total (board + auxiliary)

• Motion/driver: TMC2209 integrated

• Sensors: ADXL345 onboard

• I/O headers: 3× fan, 3× IO (level converted), 1× RGB, 1× heater, 1× thermistor

• Power: XT30 input, 5 V/3 A DC-DC, high-power MOSFETs

• Service: RESET/BOOT0, USB-C flashing

Compatibility

Designed for StealthBurner / StealthChanger toolhead environments using Klipper. Verify pinout and physical clearances for your specific toolhead and controller.

Package contents

• FYSETC SB CAN V2 main board

• Custom XT30 cable

• Auxiliary board

Firmware notes (Klipper)

• Flash over USB-C or via CAN after assigning a canbus_uuid

• Use the CAN/USB switch to choose your transport

• Add device-specific macros and pin mappings per your controller documentation

Documentation

• github.com/FYSETC/SB_Combo_V2